The Crimes and Violence of Birds

Reddish Egret, Egretta rufescens

It’s a fairy tale or fake news to believe all is sweet and peaceful in the world of birds. We are enchanted by their melodious tweets and beautiful plumage, and are often found among them in seemingly peaceful natural settings, but don’t be fooled. Their world is one without constables or arbiters of justice. There are no rules, other than “might makes right”, “survival of the fittest”, and “it’s okay if you can get away with it”.

Blue Jay, Cyanocitta cristata

Their crimes range from petty theft to rape and murder. We birders are onlookers into this world which is similar to our old Wild West, and are grateful for our, albeit fragile, institutions of justice. As we bird we are witnesses to many of these crimes and often wonder what it would be like living in their world. Occasionally I’m even tempted to intervene on behalf of a victimized bird, but usually hold back and let nature take its course and toll.

American Wigeon, Anas americana

Many of their crimes are mere misdemeanors. This would include the holes the Red-bellied Woodpecker is making in my sister-in-law’s cedar siding. The crows, jays, and gulls are perfecters of the art of petty theft. The former two are attracted to shiny objects, while the latter steals food, literally from the mouths of their careless victims. This usually results in a chase, sometimes resulting in a maimed fish dropped back into the ocean with no party getting any satisfaction.

Red-bellied Woodpecker, Melanerpes carolinus

A somewhat more onerous and significant crime is the practice of brood parasitism as I’ve discussed in prior posts. This disgusts our human sense of fairness and personal responsibility, but evolution has apparently blessed it as a successful tactic among many bird species. The initial crime is the stealthy planting of the itinerant egg in the nest of the unsuspecting parent-to-be, but the atrocity is magnified when the robust hatchling pushes the other weaker step-sibling out of the nest.

Brown-headed Cowbird, Molothrus ater

Many avian disputes are over territory and nesting rights, somewhat similar to those issues which crowd our human court dockets. The Red-winged Blackbird claims his territory with a beautiful song, but don’t let that fool you. He’ll attack any other bird, even a larger foe, that dares interlope into his nesting sphere of influence.

Bald Eagle, Haliaeetus leucocephalus

My friends Andy and Sam were accidental witnesses to a spectacular avian air battle between an adult Bald Eagle and Osprey. Andy was even dexterous enough to grab a camera and snap off a shot or two to document the event. Unfortunately, in cases such as that one shoots the pictures first, and checks camera settings later. It seemed like the smaller Osprey got the better of that fight. It was probably a territorial spat with the eagle getting too close to the Osprey’s nest. As you know, Bald Eagles are opportunistic scavengers, often feasting on the killings of others.

Red-shouldered Hawk, Buteo lineatus

Hawks and owls, on the other hand, are merciless killers, always on the prowl to feed themselves and their offspring. Often their victims are other birds, but small mammals are also unsafe around a hungry bird-of-prey. In my yard Accipiters have become good at patrolling the bird feeders, flying in fast and low to take an innocent, unsuspecting passerine. We can take some comfort in that such killings are a necessity of life for the raptor.

Tundra Swan, Cygnus columbianus

In my last post I reported the rape of a Muscovy Duck. I will hazard a completely uninformed guess and venture that most sex among birds is consensual. I may be completely wrong about this, but do point out that many birds do mate for life. That lasting bond would be hard to imagine if it began with a rape, but admittedly I’m anthropomorphizing. Those ducks, however, did seem to cross a line, with no avian justice in sight.

Reddish Egret, Egretta rufescens

I was recently chasing a rarity Iceland Gull on Fort Myers beach, unsuccessfully, when I snuck up on a Reddish Egret and was rewarded with my closest shots ever of the great bird. Suddenly a second egret swooped in and I witnessed a prolonged battle; or was it courtship and copulation? I find it hard to differentiate these with the birds.

So with all the violence, what is the mortality rate among birds? In this year of the pandemic our human death rates are plastered on the headlines daily. A few things are clear in the avian world. Larger birds live longer than smaller birds, but why is this so? Perhaps it’s because the larger birds are near the top of the food chain and less often preyed upon. Banding data has reported some longevity record life spans: Red-tailed Hawks and Brown Pelicans, 28 years; American Robin, 14 years; Eastern Bluebird, 10 years; and Ruby-throated Hummingbird, 9 years. Most birds, however have much shorter lives.

Ring-billed Gull, Larus delawarensis

It’s estimated that 80-90% of birds do not live to maturity. This is a striking number, but when one remembers the numerous eggs laid and multiple broods per year created by a mating pair, it makes perfect sense. If they all survived we would be inundated with birds, just like an Alfred Hitchcock film. It’s also said that the mortality rate of birds is six times higher during spring and fall migrations. Travel is risky, as we all know.

Anna’s Hummingbird, Calypte anna

It’s difficult to determine how many birds die at the hands or feet of other birds, or from avian diseases. Data regarding bird deaths caused by us humans is more readily available. Collisions with buildings and glass claim an astounding 600 million birds a year; collisions with vehicles, 200 million, and electric wires, 25 million. Six million birds succumb to electrocution each year and one such case was chronicled in my post of 17 November 2019. Our pesticides claim another 72 million per year, and who knows how many die from their loss of habitat. But all these numbers pale next to the 2.4 billion birds killed yearly by domestic and feral cats. That shocking number is hard to believe.

Great Blue Heron, Ardea herodias

How can I conclude such a morbid post of avian crime and death? Perhaps by showing you two Great Blue Herons in love, or by simply stating that these are observations of life on our planet as it is, and not as we wish it to be. It’s merely a description of both the beautiful and fair, right along with the ugly and unjust.

A Season For Nesting

Great Blue Heron, Ardea herodias

 

“For everything there is a season, and a time for every purpose under heaven”, Ecclesiastes 3:1.  The earth has just passed through the solstice and the seasons have changed yet again.  We have that 23 degree tilt to thank for this welcome variety in our lives.  For the birds the spring migration is over and some of the Arctic nesters are already beginning to feel the urge to head south.  But around here in Chesapeake country, nesting and all its attendant chores is in full swing.

House Wren, Troglodytes aedon

The first task is to choose a suitable site, one pleasing to her, for even in the avian world the female needs to be satisfied.  “Mr. and Mrs. Mallard were looking for a place to live.  But every time Mr. Mallard saw what looked like a nice place, Mrs. Mallard said it was no good.  There was sure to be foxes in the woods or turtles in the water, and she was not going to raise a family where there might be foxes or turtles.  So they flew on and on.”

Mallards, Anas platyrhynchos

That’s the first paragraph of Robert McCloskey’s 1941 classic, “Make Way For Ducklings” and is a favorite of our family.  Mrs. Mallard’s final choice in the middle of urban Boston’s Public Garden makes me question her judgement somewhat, but as the story goes, she did receive welcomed police protection.

Juvenile Bald Eagle, Haliaeetus leucocephalus

This spring I’ve noticed a significant decrease in the Tree Swallow population, leaving the yard’s birdhouses to the Eastern Bluebirds which have had a banner year.  But even their lives are not without controversy.  “Of all the houses, in all the yards, in all the world, this is the one you chose?”  The male bluebird can just hang is head in shame and vow to do better next year.

Eastern Bluebirds, Sialia sialis

I marvel at the variety of nesting strategies.  Some try to hide the nest from predators and the elements, deep in the leafy shrubs, while others nest in plain sight, oblivious to the risks.  The former nests only become apparent in the leafless winter when I’m surprised to see the vacated refuge, often near the front door.

Yellow Warbler, Dendroica petechia

The Killdeer, however, just scrapes a few stones together in the wide open driveway and hopes that I’ll avoid it with the truck, or that he’ll successfully fool me and lead me away with that phony injured wing routine.  Inexplicably the ancient Diamondback Terrapin follows the Killdeer’s lead as she crawls out of the muddy cove, lumbers across the lawn, and digs her nest right in the middle of the driveway.  This is just too easy pickings for the Raccoon and Black Snake who have a great appetite for the leathery turtle eggs, but who am I to argue with eons of evolutionary success.

Anhinga, Anhinga anhinga

The breadth of nesting materials is great, ranging from stones to the soft down lining the nests of passerines.  Larger birds use coarser sticks, more structurally suited to their weight and their exposed sites.  But the Osprey couple often don’t agree on the suitability of every stick.  I’ve observed the triumphant male, with great effort, fly in with a beauty, to my eye the perfect stick, and proudly present it to his mate for placement in the growing nest.  As soon as he flies away to find another she kicks it into the river, probably muttering something unkind under her breath.

Osprey, Pandion haliaetus

Since large nests are difficult to hide, the waders seek safety in numbers, nesting in large, noisy rookeries, often on a island populated by diverse species.  The Venice rookery in Florida, a favorite destination for me and many bird photographers, is a great example.  But one can never completely protect the nest.  J.J. Audubon has wonderfully captured the drama of a rattle snake attack on the Mockingbird nest as these birds valiantly rise to the defense of their young.  There will always be risks.

Mimus polyglottos by J. J. Audubon

Cavity nesters have more choices than ever before.  Bird lovers have made up for the disappearance of natural cavities by building birdhouses galore.  I’ve constructed many of the standard wood variety, but have recently tried a more durable version made from PVC pipe.  It is stark white and suffered a few years of vacancy before its contemporary style was finally accepted.  The Purple Martins, on the other hand, seem to have no problem with the crowded, multi-family, modern look.  To each his own.

Eastern Bluebird, Sialis sialis

Purple Martins, Progne subis

There’s also great variety in the chosen structure of the nest.  Many seem too precarious to be practical.  I refer to the Osprey again, attempting to build on the point of channel marker 2SD, right off our dock.  I suspect this is a juvenile bird, still learning the ropes.

Osprey, Pandion haliaetus

The least appealing in terms of materials, view, etc., are the nests of the Barn Swallows, plastered to the underside of a dock or the ceiling of a dingy porch or barn.  They seem perfectly content with their residential design, however, and who are we to judge.

Barn Swallow, Hirundo rustica

Don’t forget the swinging sacs carefully constructed by the Baltimore Oriole, but the world’s record for the sac design has to be the Baya Weaver’s amazing creation which we saw hanging in India several years ago.

Baya Weaver, Ploceus philippinus

I hate to bring them up again, but must remind you of the dastardly Cuckoos and and Cowbirds that just avoid the entire drudgery of nesting by their successful brood parasitism.  I just hope it doesn’t catch on.

Pileated Woodpecker, Dryocopus pileatus

Is the season of nesting initiated by temperature, hours of daylight, hormones, or some other deep rooted instinct that passes down through the generations?  Nesting is clearly not limited to the Aves.  The American Pregnancy Association clearly recognizes the nesting urge in Homo sapiens, usually, but not always, occurring in late pregnancy.  They have published guidelines to help expectant mothers channel their energy toward making their nests perfect for the new arrivals.

Brown-headed Nuthatches, Sitta pusilla

This nesting season, as they all do, will pass too quickly.  The fawns are already losing their spots and wandering independently.  The fledgling geese, although diminished in number by the Red Fox, are almost full grown.  The Bluebirds and Brown-headed Nuthatches are still busy feeding their chicks, but this also will end soon.  Their nests, like ours, will be empty.  For everything there is a season.

Trash Birds

Herring Gull, Larus argentatus

 

These are the birds no one loves.  They’re numerous, obnoxious, and ubiquitous.  We often do not even tick them off on our eBird lists; why bother?  Most do not migrate; we’re stuck with them all year long.  Monthly the National Audubon Society scares us with a growing list of near-extinctions, but these birds never make the list.  Despite our efforts to pollute and destroy habitats, these birds thrive.

House Sparrow, Passer domesticus

But, “one man’s trash is another man’s treasure”.  If you don’t believe this just watch a couple episodes of the Antique Roadshow on PBS.  A little research can reveal beauty, wonder, and maybe even some monetary reward in even the most unlikely of candidates.  With this in mind this post tries to uncover a few redeeming qualities in my list of trash birds, at least in the beauty and wonder departments.

Eurasian Tree Sparrow, Passer montanus

Take the House Sparrow, please.  Previously known as the English Sparrow, it was introduced to New York in 1851, and we are still wondering why.  This aggressive Old World sparrow is a native of Eurasia and northern Africa and has enjoyed phenomenal success in North America.  The lookalike cousin across the pond is the Eurasian Tree Sparrow.  Its strategy has been to seek out urban centers, crowded sidewalk cafes, and virtually any man-made structure.  You can’t say the male is ugly with its gray head, black beard, and brown and white highlights.  The female is just another difficult to identify LBJ, (little brown job).

Rock Dove, Columba livia

Speaking of urban-loving birds transplanted to us from Europe, Africa, and India, you can count the feral Pigeon.  In more polite circles they are known as Rock Doves.  We are partly to blame for their success, domesticating them for their homing tendencies.  As we all know they have taken over our park benches, school yards, and sky scraper ledges.  A few have attempted to return to their rural roots, nesting on coastal cliffs and mountainsides, but the vast majority still cling to us humans and our cities.  Their redeeming feature is the great variety of iridescent feathers and that striking red eye.

Boat-tailed Grackle, Quiscalus major

Next there are the Grackles.  Just the name reminds one of their irritating call that mimics a rusty gate desperately in need of oil.  They often travel in wolf-like packs, swarming the feeder and driving off the shier passerines.  They have single handedly caused me to shut down the feeders in the warm weather.  One can only afford so many bags of sunflower seeds on a fixed retirement income.  You have to look closely to reveal their beauty, also found in the iridescent plumage and piercing golden eye of the male Common Grackle.  The less common cousins, the Boat-tailed and Great-tailed, share similar assets and  liabilities.

Ring-billed Gulls, Larus delawarensis

Sea Gulls have lost the “sea” in their name and have moved inland following our human trash, dumps, waste water treatment plants, and McDonalds parking lots.  For a birder to become an expert observer of this confusing family of lookalikes, he or she must become gullible.  They’ll take you to some of the most acrid and non-picturesque places on the planet and your reward will be a squabbling colony of black, white, and shades of gray.  You’ll have to hope for the chills and thrills of finding a rarity amidst that flock of a thousand scavengers.

European Starling, Sturnus vulgaris

We could drop the “European” from the name of our only Starling in North America, but keep it as a reminder of where this “gift” came from in 1890.  It has taken over the continent with vast flocks forming in the fall and winter.  It crowds out other birds in both the urban centers and rural farmlands, competing with other more welcome cavity nesters.  They are persistent.  I’ve now removed their nest from my boat-lift motor six times this spring, the last time despite a new protective screen.  They pecked right through it.  On a sunny day, when I’m feeling upbeat, I can appreciate the metallic hues given off by their feathers, decorated with a sprinkle of dots.  The yellow bill of the summertime male adds a nice contrast.  I’m trying to be kind.

Brown-headed Cowbird, Molothrus ater

Remember the phrase, “a face only a mother could love”?  The maternal Brown-headed Cowbird must have forgotten it.  She just clandestinely deposits her eggs in another innocent passerine’s nest and moves on, without even gazing upon the face of her offspring.  These brood parasites have developed a successful policy of avoiding the hard work of parenthood.  You have to admire their audacity or perhaps find some pleasure in their contrasting brown and black coloration, but its hard to find anything good to say about them.

American Crow, Corvus brachyrhynchos

We’re frequently told that Crows are among the smartest of all birds, but intelligence is no excuse and protector from being on my trash list.  There is a reason that a flock of these birds is called a “murder” of crows.  When’s the last time you saw a crow sitting innocently on a wire, just enjoying life.  They’re always chasing or being chased, raising a raucous, or attacking a poor songbird.  Perhaps you can admire their energy, but they are a constant reminder that intelligence does not always breed contentment.

Herring Gull, Larus argentatus

So there you have it, my list of trash birds.  I suspect this post will find disfavor among my birding friends who find beauty in all the creation.  On a good day I am among their ranks, but lately my tolerance level has been tested.  Here’s to better days ahead.

Bird Sleep

 

Just after sunset, with fading light and falling temperature, wave after wave of Canada Geese circled our cove and gracefully landed.  They joined a raucous flock of geese, perhaps 500 or more, apparently judging the cove to be a safe haven for the night.  But with all the honking I wondered if any, myself included, would ever be able to fall asleep.  With darkness, however, they did quiet down, except for the occasional honk from a vigilant sentry goose proclaiming all is well.

Canada Geese, Branta canadensis

As one ages sleep patterns become an issue, and sometimes even a topic of conversation and concern.  Being a curious birder I decided to do a little research, emphasis on little, as to the sleeping habits of our feathered friends.  What’s their sleep pattern, how much do they need, where do they go at night, can they sleep while flying, etc.?  I also scanned my photo archives looking for pictures of sleeping birds.  Unfortunately I usually delete pictures of birds with their eyes closed, but did find a few suitable for this post.

Eastern Screech Owl, Megascops asio

On my bedside nightstand there is a fascinating book by Matthew Walker entitled “Why We Sleep”.  It’s mostly about humans but does include a great chapter about the evolution of sleep.  According to the author a biologic sleep requirement must have evolved very early, as all animals, even insects, demonstrate sleep cycles.  You can confirm this with the characteristic brain waves on the EEG’s of sleeping animals and by periodic cycles of non-arousal of small insects.

Yellow-crowned Night-Heron, Nyctanassa violacea

Although all animals require some sleep, the amount and style vary considerably.  Walker states that the length of the restorative sleep requirement is determined by the complexity of the animal’s nervous system.  Both the length and type have evolved separately for every species and are balanced by the equally important need for wakeful hunting, eating, nest-building, and blog writing.

Dunlins, Calidris alpina

We are all familiar with the two types of sleep, REM and non-REM, identified by their characteristic brain waves.  It’s interesting that REM, the shallower sleep stage associated with dreaming, only occurs in mammals and birds.  It is, therefore, a later creation in the evolutionary sequence.  I consider it an “eye opener” to think of birds actually dreaming.

Common Nighthawk, Chordeiles minor

Although there are similarities between avian and human sleep, there are also many differences.  Birds demonstrate hemispheric sleep, the amazing ability to let half the brain sleep while the other half stays wide awake, perhaps as a defense for lurking predators.  At some point this split reverses and the other half falls asleep.  It’s interesting that this hemispheric sleep only occurs with non-REM sleep; REM for some reason, requires total brain participation.

Barred Owl, Strix varia

Frigatebirds are amazing seabirds that can stay aloft without landing for up to two months.  They have one major deficit–they cannot swim.  If forced to land at sea they quickly become water-logged and drown.  So curious Niels Rattenborg and others from the Max Planck Institute for Ornithology figured they would be the perfect bird to evaluate for in-flight sleep.

Magnificent Frigatebird, Fregata magnificent     photo by A. Sternick

Rattenborg fastened EEG leads to the skulls of 15 frigatebirds and attached a device to monitor flight speed.  The study confirmed that birds do indeed sleep while flying, but not in the expected manner.  They slept only in short bursts of 10 seconds and only for a total of 45 minutes each day, a much shorter duration than their sleep cycle on land.  They also only used hemispheric sleep while flying, and only slept while gaining altitude in a thermal.  They were completely awake and alert in every gliding descent, perhaps to avoid a lethal crash landing at sea.

Black Skimmers, Rynchops niger

Birds assume many different sleeping positions on land, but I’ve not yet seen one on its back with feet pointing heavenward.  Shorebirds sleep standing up, often on one leg, and usually facing into the wind.  Night herons, owls, and woodpeckers sleep  perched upright.  Their leg muscles in a relaxed state result in a clenched claw, firmly grasping the branch.  Many birds such as the nighthawks sleep horizontally, while some parrots sleep hanging upside down in a bat-like manner.  Many cavity nesters seek out a vacant cavity for the night.

Bonaparte Gull, Larus philadelphia

Birds, like humans, are susceptible to sleep deprivation.  Walker reports that the U.S. government has spent millions investigating the sleep pattern of the lowly White-crowned Sparrow.  If you deprive this bird of sleep during the season it would normally be migrating, it experiences no ill effects.  But similar sleep deprivation at any other time results in catastrophic physiologic brain and body dysfunction.

White-crowned Sparrow, Zonotrichia leucophrys

I’m not sure how they deprived the little bird of sleep; perhaps with bright lights and continuous Barry Manilow songs at high volume.  In any case, this bird has apparently evolved some protective mechanism for sleep deprivation that the U.S. government would love to uncover.

Black-crowned Night-Heron, Nycticorax nycticorax

Have you noticed how difficult it is to sleep the first night in a new hotel and bed?  I now believe this is a throwback to my evolutionary past.  Is there a Sabre-toothed Tiger lurking in the bushes or a Wooly Mammoth lumbering past my cave?  Just like the birds I require safe sleep, but haven’t yet mastered that hemispheric trick.  I guess I need that sentinel goose, standing guard and signaling all is well.

Blue Ridge Birding, Brides, and Biophilia

Red-tailed Hawk, Buteo jamaicensis

 

If you’re a urban dweller in the Washington / Baltimore corridor the urge to escape the asphalt jungle can either pull you to the east and the rural tidal wetlands of the Chesapeake Bay, or to the  west and the historic Shenandoah Valley and Blue Ridge Mountains.  It was the lure of the saltwater bay that won the day for us, but not without an occasional wistful glance over our shoulders to the beautiful mountains of Virginia.  Luckily a family wedding and an invitation from friends allowed us to visit this hill country in October.

Bald Eagle, Haliaeetus leucocephalus

Edward Wilson codified our urge to commune with nature as the “biophilia hypothesis” in 1984.  He actually suggested a genetic basis for homo sapien’s desire to affiliate with other forms of life, both plant and animal.  I suspect it’s a driving force behind increasing urban green spaces, back yard gardening, environmentalism, and the popularity of birding.  It may have also inspired an urban bride and groom to head to the mountains to exchange their vows.

It was a perfect day for a wedding with an Indian summer sun’s slanting, late afternoon rays, shining on the wedding party.  Grazing cows on the nearby hills barely noticed the nuptial festivities.  I was not unaware of the soaring birds completing the idyllic scene.  Live music and dancing, with some blue grass flavor finished the memorable day.

Eastern Bluebird, Sialia sialis

The next morning we headed further south and west, higher into the Blue Ridge, along the Cow Pasture River.  Friends from Charlottesville, two families, had jointly dreamed of owning a cabin in the hills.  It would be a rustic, secluded lodge, along a river, ideal for fly-fishing, tubing, and hiking.  It would be a country retreat for the two large families, now with many grandchildren.  It was all that and more with a large front porch, stone fireplace, and comfortable beds, with a nearby bunkhouse for the kids.

One arrives at this destination over a mile of winding, narrow, gravel road along the creek bed, past a repaired wash-out, and through the dense woods.  Several times I wanted to turn back, this couldn’t be the right route, but we pressed on.  At the edge of the forest and the top of the last hill we finally saw the house in the valley below, with barking dogs, Lang, Peggy, and Mike all welcoming us to their home in the mountains.

Right out of the car I spotted a large bird perched atop a pole and power line, maybe a quarter mile across the valley.  It had a light upper and dark lower body and I prematurely declared it must be a Bald Eagle.  I quickly unpacked my camera and proceeded to close in for a better look.  The technique is to advance 50 feet, take some shots, check exposure factors, and advance another 50 feet.  If you’re lucky you may even get a flight shot when the bird finally spooks.

Yellow-Romped Warbler, Dendroica coronata

In my experience most raptors, especially eagles, won’t let you get very close.  My goal was to hide behind the last tree, perhaps 100 yards from the perching bird.  I inched my way there and still the bird did not move; something was not right.  I took more shots and zoomed them to the maximum.  It was not an eagle.  It was a Red-tailed Hawk, upside down, and dead.  The whiteness I saw from a distance was the hawk’s lower belly feathers, not the head of a Bald Eagle.

Obviously I could now get as close as I wanted, inspect the crime scene, and get as many shots as needed, all with the correct sun angle and exposure.  This hawk was not going anywhere.  How did this proud bird reach this ignoble, inverted end, hanging earthward, limp, dead?  Death had come recently.  There were no signs of gunshot, but man was not completely blameless.  I believe this was death by electrocution.

Birds land and perch on power lines everyday with no ill effect.  The flow of electrons takes the direction of least resistance through the wire, bypassing the relatively insulated body of the bird.  If that bird, however, ever touches another wire or any grounded structure, the current will flow through the bird and kill it.  My theory is that this hapless hawk landed on top of the wooden pole and its wing or feet touched the wire, completing the circuit from wire, to bird, to pole, and the ground.

Barn Swallows, Hirundo rustica

I did more birding that day and the next as our hosts guided us over the suspension bridge and through their forest on barely blazed trails.  We saw other woodland birds but I could not get that hawk out of my mind.  A couple weeks later Peggy emailed me that it had finally fallen to earth and the vultures had picked over the corpse, leaving just feathers and some bones to mark the spot.

And time goes by.  This fall weekend reminded me of that yet again.  Mother Earth and all its creatures grow old.  If we’re fortunate aging is graceful and gradual, but occasionally unexpected tragedy intervenes.  We cling to nature, each other, and our God for solace, but time waits for no one, not even a Red-tailed Hawk.

Birding Daily, Almost

 

Osprey, Pandion haliaetus

 

They were loud, almost obnoxious neighbors.  When we slept with the windows open to catch the gentle summer breeze they were the last thing we heard each evening and the first raucous greeting each dawn.  But now they are gone, without even a neighborly adieu, and I admit to missing them already.

Osprey family

There are three Osprey platforms along our shore and each hosts a successful breeding pair every summer.  The parents, new fledglings, and yearlings certainly created an interesting summer on San Domingo Creek this year, learning to fly, fish, and chase away the bullying Fish Crows.  But now they’re all gone and the quiet is eerie.

Eastern Kingbird, Tyrannus tyrannus

Other quieter cast members have also left the stage, exit south.  I refer to the Eastern Kingbirds, whom the permanent resident Northern Mockingbirds allowed to breed beside the cove, and the related Barn and Tree Swallows who breed under the dock and in the Bluebird houses.  Any day now they will be replaced by large noisy flocks of migratory Canada Geese and a new cacophony will begin.  Alas, another season has passed.

Barn Swallow, Hirundo rustica

My birding has evolved, and not necessarily for the better.  It’s been a long time, since Norway in May, for me to purposely set out on a birding excursion.  You know the drill; an early AM start armed with binoculars, camera with telephoto lens, guide book or cell phone, bug spray, sun protection, etc.

Tree Swallow, Tachycineta bicolor

I may have become a victim of the eBird challenge for us to bird continuously, submitting daily lists of sightings as we go about our non-birding lives.  Their intentions at Cornell are laudable, trying to expand the world-wide data base of birds to assess population trends and birds at risk.  But I think I may have carried this all too far.

Northern Mockingbird, Mimus polyglottos

The eBird app makes it too easy (http://www.ebird.org).  We went out for a seafood dinner along the Tred Avon River with a large group and I secured a waterside seat so I could clandestinely count the cormorants and gulls between bites.  No one knew.  One of my favorite personal locations is a comfortable hammock strategically positioned in the back yard between a feeder and birdbath.  The chickadees, finches, and hummingbirds hardly notice me there unless I snore and drop the iPhone.  I even got a few ticks through a hospital window during a brief illness last January.

American Goldfinch, Carduelis tristis

eBird got serious about these daily tabulations last January when they announced the “Checklist-A-Day Challenge”.  Submit your daily sightings all year long, even if a session is as short as 3 minutes, and be eligible to win a set of Zeiss binoculars on December 31.  More importantly you contribute to a valuable growing database of birds.  I started the year on a roll, 133 straight days of sightings, but then life intervened.  Not to worry, you just need an average of 1 list per day and there are still 97 days left in 2019 to make up the deficit.

Lincoln Park, Chicago

We recently took two short non-birding trips that allowed me to squeeze in a few observations.  One was to a spectacular family wedding at Chicago, Lincoln Park.  The joy of seeing my nephew and his beautiful bride begin their lives together, and seeing the satisfaction and celebration of the supporting families and friends overshadowed even the birds.  But I did count some on the shore of Lake Michigan and during an architectural tour on the Chicago River, whose flow, by the way, was remarkably reversed by engineers in 1900.

Keuka Springs Winery

The other trip was to Upstate New York, my native stomping ground.  To the New York City crowd, anything north of the Tappan Zee Bridge is called “upstate”.  The rest of us know that the true upstate is Syracuse, Rochester, Ithaca, Watkins Glen, Skaneateles, and countless other small towns nestled among the rolling hills, wineries, and the Finger Lakes.  The residents here even sound different than the big city folks.  I don’t believe there is a more beautiful and comfortable place anywhere in the summer.  But forget the winters.

White-breasted Nuthatch, Sitta carolinensis

It was another chance for some soft core birding while we became reacquainted with family and friends.  My sister has maintained and restored the old summer cottage that my Dad and Mom bought on Keuka Lake in 1956, and my brother has recently relocated just down the road.   We had dinner with the same next door neighbors that I knew in the 1950’s, now with several generations of offspring all returning to their homestead each year, similar to those migrating Osprey.

Wood Duck, Aix sponsa

I’m the only birder in the family, so for one week the old feeder is dusted off and filled with sunflower seeds.  It only takes a few hours for the chickadees and finches, to find the cache.  I’m particularly pleased with the nuthatches climbing the trunks of the ash and pines near the back door.  We have Wood Ducks, American Black Ducks, and Common Mergansers on the lake, all new since my childhood days when we only saw Mallards.  There even was an Osprey fishing near the shore, apparently just as happy with the freshwater sunfish and bass as their more common salt water catch.

Common Merganser, Mergus merganser

The last stop in Upstate was Ithaca, the home of dear friends and also the famous Sapsucker Woods and the Cornell Lab of Ornithology.  I can “blame” them for my list-a-day craze, but Cornell and their brain child eBird have seriously revolutionized birding.

Sapsucker Woods Pond

Their data, even my sightings from the hammock, have documented the loss of 3 billion birds from the U.S. and Canada since the 1970’s, 30% of our total bird population.  “More than 90% of the losses are from 12 families including sparrows, finches, blackbirds, and warblers”.  But all is not doom and gloom.  The water fowl population has grown 56% and raptors are up 200% over the same period.  Those ducks and the thriving Osprey families can thank Cornell, dedicated ornithologists, and even lowly eBirders for this revival.

 

Birding Florida in August

Tricolor Heron, Egretta tricolor

 

In early August I spent a week in south Florida.  No, I’m not crazy.  I had some indoor painting to do there, and own a perfectly functioning air conditioner.  It makes one wonder what people did in the South before AC.  And more importantly, how do the birds handle this heat?  Instead of watching the paint dry I  ventured outside to do a little summertime birding and to solve this mystery.

White Ibis, Eudocimus albus

The August humidity in Florida is oppressive; just get used to being damp while doing anything outside, including birding.  We sweat in an attempt to cool our bodies through evaporation.  Remember your high school thermodynamics; water going from liquid to gaseous phases requires energy and draws heat away from your skin.  But birds don’t sweat; they do not have sweat glands.  Despite this they still like to stay wet in the hot weather to take advantage of evaporative cooling.

Fish Crow, Corvus ossifragus

Birds have also developed other behavioral and physiologic mechanisms to deal with extreme heat.  They have a much higher metabolic rate than humans and a higher baseline temperature, as high as 108F degrees for some birds.  Ninety degree days, therefore are not as critical for a bird as for us humans, however extreme temperatures can be a problem.  Their behavioral adjustments to the heat strike me as just common sense, like things your mother would tell you.  “Stay out of the hot mid-day sun, feed and play in the early morning or evening, bathe often, and drink a lot of water.”

Brown Pelicans, Pelecanus occidentalis

I understand that soaring birds soar even higher on hot days, seeking cooler air.  If all else fails, the birds can always consider an earlier fall migration or relocation to habitats at higher elevation.  Indeed the ranges of many birds are expanding northward as the climate warms.

Osprey, Pandion haliaetus

Avian physiologic adjustments to heat are interesting.  Birds can increase their respiratory rate and breathe with an open bill, just like a panting dog.  Think of the bird’s lungs as a heat exchanger, with heat passing from the hot blood to the relatively cooler air.  Some birds take this thermoregulation to a higher level, by including a rapid vibration of the moist throat to enhance evaporation.  This is called “gular fluttering” and can be seen with cormorants, night hawks, and doves.

Yellow-crowned Night Heron, Nyctanassa violacea

Feathers, such vital insulating structures for cooler weather, work against the bird in the hot summer.  Luckily birds also have some vascular featherless body parts, (legs, feet, bills, eye rings) that can also function as cooling heat exchangers.  The huge bills of the tropical Toucans are very vascular and a good example of this cooling technique.  When the temperature finally falls the blood flow to these parts decreases to maintain warmth.

Green Heron, Butorides virescens

Vultures, as you might expect, lead the way with the most disgusting cooling method.  Urohydrosis is the sophisticated term for these birds urinating on their feet and legs to foster evaporative cooling.  The drying white urate salts also better reflect the sun’s rays than the darker clean legs and feet.  I’m told that multi-colored birds perch with their lighter and more reflective plumage toward the sun in hot weather, but have not observed this pattern myself.

Black Vulture, Coragyps atratus

Some of these cooling methods were evident while birding the Pelican Bay berm along the mangroves and further inland at the Corkscrew Swamp Sanctuary.  The birds were hiding from me and the heat, especially the passerines where only a few were active in the deep shade of the cypress forest.  There certainly was no shortage of water as the ditches and ponds were all full from the daily monsoons.  The Florida waders were out in force, but I only saw one shorebird; a Willet frolicking alone in the Gulf surf.

Yellow-crowned Night Heron, Nyctanassa violacea

Anhinga, a juvenile night heron, and a vulture were all seen holding their wings out, away from their bodies.  This is for drying and evaporative cooling, but also to keep the insulating wing feathers away from the body.

Corkscrew’s Lettuce Lake

Don’t forget the birder who must also adapt to the heat.  Sunscreen, hats, water bottles, etc. are obvious, but I wasn’t prepared for the severe Florida humidity.  The air temperature was similar to that of the Chesapeake region this time of year, but the humidity was brutal.

Great Blue Heron, Ardea herodias

Dripping sweat clouding glasses and lenses was a constant battle, but on the plus side, there were no throngs crowding the birding hotspots.  I made the 3 mile loop on the Corkscrew boardwalk and saw only two other birders.  There were many more guides than patrons.  The Pelican Bay berm and beach were almost empty with no joggers or bikers to dodge.  If you prefer to bird alone, Florida in August beckons.

Gulf of Mexico

August is our yearly lull on the birding calendar for more reasons than just the heat.  The excitement of breeding, nesting, and feeding hatchlings is subsiding.  Birds are lying low, molting, and building up reserves for a possible long fall migration.  For the full time residents of Florida, both avian and human, its just a time to relax, try to stay cool, and wait for the inevitable surge from the north, soon to begin.

Florida’s Raptors

Red-shouldered Hawk, Buteo lineatus

 

 

I’m life untethered, soaring upward

on itself, sharp of talon and lethal of

beak, leaving nothing in my wake but

warm blood and gristle.

Taylor Rosewood

Maybe that first stanza in Rosewood’s poem is a little gruesome, but probably a fair description of the raptors or birds-of-prey who fill the niche at the peak of their food chain.  These predators include the hawks, falcons, harriers, osprey, owls, and kites, and also the scavenging vultures, eagles, and caracara.

Barred Owl, Strix varia

Raptors are characterized by keen eyesight for hunting, strong feet with talons for killing, and a sharp, curved beak for tearing flesh.  They are powerful in flight, some plunging from great altitude at high speed to take their unsuspecting prey.  A few, however, subsist on carrion, leaving the killing to others.

Turkey Vulture, Cathartes aura

The hearts of birders and non birders alike speed up when we spot a bird-of-prey, and in Florida this occurs almost daily.  Not so much with the vultures, which only a mother could love, but definitely with the rest.  The most common hawk here is the Red-shouldered, which tends to perch and call from seemingly every woodlot and residential neighborhood.

Red-shouldered Hawk, Buteo lineatus

I’ve been accused, rightly, of failing to read the fine print.  A recent birding example of the malady was my futile attempt to find a Florida specialty bird, the Short-tailed Hawk.  Everyone else was reporting it but me.  Finally I read the fine print in Dunne, Sibley, and Sutton’s classic, “Hawks In Flight”.  This bird hides itself well and is practically never seen on the ground, but hunts from great soaring heights.  To see it “look up, way up, and be grateful for the backdrop of white cumulus clouds that enrich the Florida skies.”  Sure enough, there it was just as advertised, thousands of feet above me, soaring with the vultures.

Short-tailed Hawk, Buteo brachyurus

My pictures of this hawk are not ideal given the distance, however hawk ID is not about subtle field marks, but rather about the grosser patterns of light and dark, wing and body shape, and the cadence of the flapping wings and their attitude while gliding.  The Short-tail Hawk comes in two varieties or morphs.  I saw the light morph, which reportedly is less common in Florida compared to the dark one.  These are tropical raptors of Central and South America that reach the northern limit of their range in Florida.  Unlike most buteos, they are hunters of other birds, taking them unawares from above.

Crested Caracara, Caracara cheriway

Other birds-of-prey that might be considered a Florida specialty (not as widely seen in other states) are the Crested Caracara, Snail Kite, Swallow-tailed Kite, and Burrowing Owl.  The caracara vie with Bald Eagles for “king-of-the-road-kill” supremacy.  They displace the Black Vultures from the carrion, who have displaced the Turkey Vultures, who previously shooed away the crows.  It’s a real-life pecking order.

Black Vulture, Coragyps atratus

I lived here several winters before I saw my first Snail Kite, formerly called the Everglades Kite.  This picky raptor’s diet is exclusively the apple snail, which it searches for in freshwater wetlands.  Issues with water management seriously threatened this raptor in the 1950’s with the number of surviving birds reportedly as few as 50.  Better management since has seen a recovery to 1000 or more birds, but it’s still a great birding day when you see a Snail Kite.  Look for a white base of tail in flight, not to be confused with the Northern Harrier which has a white rump.

Snail Kite, Rostrhamus sociabilis

The Swallow-tailed Kite makes it spring debut in Florida on Valentine’s Day, migrating across the Gulf of Mexico from its wintering grounds in South America.  Dunne, et-al gush, “some may argue that this kite is the continent’s most beautiful bird.  Elegant, almost rakish in design, it dresses formerly in black and white attire, tails and all.”  I do not disagree.

Swallow-tailed Kite, Elanoides forficatus

The “cute award” for raptors must go to the Burrowing Owl.  This diminutive raptor seem to thrive here, often digging their burrows in sandy vacant building lots.  Driving through Marco Island’s residential neighborhoods you see these birds sitting at their burrows with nearby stakes marking their protected nests.  It must drive the homeowners crazy while they wait for the owls to move out so they can finally build their Florida dream house.

Burrowing Owl, Athene cunicularia

I was birding at Clam Pass last week when a kayaker landed, pulled out a large net on a long handle and tried to sneak up on a Black Skimmer which appeared to be disabled by a broken leg.  Tim Thompson, I later learned was a good Samaritan and volunteer at the Conservancy of Southwest Florida.  Along with many research and educational functions this venerable organization has an animal rescue hospital, http://www.conservancy.org.  I joined in Tim’s effort to net the bird, but to no avail.  It could still fly.

Peregrine Falcon, Falco peregrinus

But I learned that Tim did this type of rescue work on a regular basis and had recently worked with others rebuilding a wind-damaged Great Horned Owl’s nest. They successfully returned two flightless downy owlets to their home, high in a slash pine, all under the watchful eyes of concerned parents.  He offered to take Andy and I back to the site, inside an exclusive golf community, check on the nest, and give us an opportunity for some owl photos.

Great Horned Owlets, Bubo virginiaus                          photo by A. Sternick

We found the owlets still safely perched in the same tree, even after the thunderstorm of the previous night.  While dodging golf balls and golfers, (who were also seeking birdies) we also found one parent watching us warily from across the fairway.  Several hundred shots later, we finally called it a good day of birding.

Great Horned Owl, Bubo virginianus

So what is it about these birds-of-prey that makes them so compelling?  We’re in awe of their size and fierce countenance.  We’re shocked by their ruthless killings which keep their prey ever wary.  But there’s also a calm confident majesty they possess as the lords of their food chain.  They only kill to survive, and are superbly equipped to do just that, with an occasional leg up from Tim and the Conservancy of Southwest Florida.

The Flight of Birds; Fair or Foul?

I was minding my own business at the desk by the window when WHACK, a Cardinal crashed into the glass.  I rushed outside to look for a body in the hedge, or at least a stunned bird, but found nothing, not even a red feather.  He must have survived.  It got me thinking about flight.  It’s marvelous and amazing and we terrestrial-bound species are jealous of the birds, but it does come with risks and at a price.  What are the risks and what exactly have the birds given up when they evolved this specialized skill.

Northern Cardinal, Cardinalis cardinalis

I count five groups that have acquired the ability to fly, (omitting the gliding frogs and squirrels).  They are the myriad insects, the extinct dinosaurs–Pterosaurs, the mammalian bats, the birds, and Homo sapiens, since Kitty Hawk.  You must admit that at least with insects and birds, flight has been a successful strategy, with Aves flying around for 150 million years since Archaeopteryx, and insects for even longer.  This compares with a meagre 20 million years for Hominids on earth, with flight mastered by us just 115 years ago.

Brown Pelican, Pelicans occidentalis

There are, of course, obvious advantages of bird flight.  They can get from point A to point B quickly, whether its to find food, escape a predator, or chase a prospective mate.  The destination may just be across the yard or a migration of thousands of miles. Their flying skills include, hovering, take-offs and landings, on either land or water, soaring, gliding, and high speed dives.  They can catch a fly on the wing and even copulate in mid-air.  Very impressive.

Red-shouldered Hawk, Buteo lineatus

There are, however, obvious physical risks to flight.  My office window, multiplied by millions is an example.  Add to that the glass of towering skyscrapers, burgeoning wind farms, and power lines, and you have some real flight hazards.  Fall migration itself takes a huge toll on the young birds.  That’s why the spring migration is less crowded, returning to us just the survivors.

Limpkin, Aramus guarauna

But I’m more interested in the anatomic and physiologic adaptations that have evolved and made flight possible, and what price Aves have paid for this specialization.  The upper extremity of birds has reduced the five digits of its ancestors to three and these serve as the anchors for the primary flight feathers.  The wing is a wonderful and highly specific adaptation for flight, but useless for grasping a tool or playing the piano.  No matter; birds have evolved a flexible neck and versatile beak and tongue to partially offset these deficits.

Rose-ringed Parakeet, Psittacula krameri

What about size?  It does matter for birds.  Flight requires the birds to be relatively small and light.  When you double the length of a bird you increase its weight 8-fold.  Even though the large Golden Eagle only weighs 15 pounds it requires an 8-foot wingspan to fly.

Black Vulture, Coragyps atratus

The physics of flight applies to the birds, just as it did for the Wright brothers.  There must be air flowing over the wing or airfoil to create enough lift to overcome the drag.  Flapping adds greatly to the lift, but weight is still a limiting factor.  Just recall the spectacle of the heavy swan or goose, beating its wings while running across the pond, in its onerous fight to become airborne.

Osprey, Pandion haliaetus

Experts debate how the Pterosaurs and ancient birds “learned” to fly.  One camp suggests a “tree-down” approach, falling or gliding from a height, similar to flying squirrels.  Another group suggests a “ground-up” technique, running or leaping into the air, similar to our struggling swan.  I doubt we’ll ever know for sure.

Laysan Albatross, Phoebastria immutabilis

Birds have also solved the weight issue by their light, hollow bones, ideal for flight but lacking somewhat in strength–another compromise.  “Light as a feather”, the saying goes.  The evolution of the feather figures centrally in the history of flying animals.  Experts now believe feathers evolved long before flight.  Once we pictured dinosaurs as hairless, leathery reptiles, but now learn that some were actually adorned with colorful feathers.  The only question is whether their feathers were for insulation or for sexual ornamentation, but clearly they were not, at least initially, useful for flight.

Belted Kingfisher, Ceryle alcyon

The weight restrictions of flight also require that a bird brain remain relatively small, and surrounded by only a thin skull.  Most of its brain is devoted to eyesight, so highly perfected in raptors, and much of the rest to the regulation of basic functions and the intricate movements of flight.  Although much has been written about the intelligence of birds, (primarily the Corvids), don’t get carried away.  They will not be writing a Beethoven symphony any time soon, or even running for political office.

Prairie Warbler, Dendroica discolor

The warm-blooded, hyperactive, flying birds are massive consumers of energy.  Their high metabolic rates require a never-ending search for food (using energy in the process) for both themselves and their young.  It is a bird’s greatest mission everyday.  The avian respiratory system is also a unique and complicated adaptation of rigid lungs, multiple air sacs, and unidirectional air flow, all designed to supply richly oxygenated blood to meet their high energy demands.

Sandwich Tern, Sterna sandvicensis

It’s interesting that some birds have given up flight completely.  You wonder why.  For Penguins the rudimentary wings are now used for swimming, while the large Ostriches of the savannas of Africa use their downy feathers and wings for shade.  The flightless Dodo birds of the Mauritius Island in the Indian Ocean were doing just fine on the ground until discovered by Dutch sailors in 1598.  The vulnerable bird was easy prey for man and his contaminants and the Dodo is now extinct.  Unfortunately its name has become synonymous with naiveté and stupidity.

Wood Stork, Mycteria americana

So the birds have paid some price for their lives in the sky.  We humans need to keep this in mind as we stretch our frontiers upward, even to the Moon and Mars.  I consider Homo sapiens now a flying animal, similar to the birds.  We are part of nature and not just an outside observer looking in.  Never mind that our “wings” are metal and rivets and computers; they are merely our adaptations, the products of our brains, and our unique ticket to the wonders of flight.

The Wright brothers, Homo sapiens, 1903

 

Birding While Kayaking

Glossy Ibis, Plegadis falcinellus

 

When bit by the birding bug your behavior becomes bizarre, according to belittling bystanders.  Be that as it may.  One of our traits is the need to bird constantly.  As you know, birding can be accomplished at many levels of intensity.  There’s the full court press of binoculars, scopes, telephoto lenses, guidebooks, and computers on the one extreme, and the casual noting of birdsong and flyovers as you live the rest of your life, on the other.

Belted Kingfisher, Ceryle alcyon                    (click to zoom)

I’ve birded while sailing (see a prior posting), during a pelagic expedition off the coast of California (another prior posting), and now while kayaking.  I can testify that the latter is the most rewarding aqueous birding for me.  A kayak allows a stealthy approach to the quarry, the bird almost accepting you as part of the water.  There’s no flapping sail, noisy engine, or chumming (either intentional or due to sea-sickness).  As opposed to a tippy canoe, with a kayak you sit right down in the water, at eye level with the surface, giving a pleasing angle for viewing or photography.

Least Tern, Sterna antillarum

A couple practical hints:  wear gloves to avoid blisters, plan on getting wet (you might want to leave your expensive photography equipment on dry land), and if in a dual kayak, take the back seat (you get to steer, the other person can’t whack you with the paddle, and you can take a clandestine break while your partner keeps paddling).  Also, check the boat for varmints.  I keep my kayak turned over on the bank and wasn’t aware I had a large black snake onboard until well underway.  So much for the birding that day.

Osprey, Pandion haliaetus

I’ve birded from a kayak in the mangrove swamps of southwest Florida and near home on tributaries of the Chesapeake Bay.  The Florida excursion was with six people in three boats.  The leading kayak contained the alpha males whose quest was to traverse the swamp and inland waterway and make it to the Gulf of Mexico and unknown distant shores as quickly as possible.  The second boat was made up of young, physically fit bones that could paddle all day.  They weren’t really interested in birds.  The last boat was mine, with two sixty something year old birders trying to keep up and see some interesting birds.  I was in the stern seat.

A mangrove tunnel, from the back seat

The mangrove swamps south of Naples bordering the gulf coast are an extensive tropical tidal ecosystem covering 2700 square kilometers and sometimes extending up to 30 miles inland.  They are the final watershed of the Everglades and Great Cypress Swamp.  The mangrove are crisscrossed by a myriad of navigable tunnels and a few wider waterways.  Its very easy to get turned around and lost if you don’t keep up with your leader, assuming he knows where he’s going.  A handheld GPS is invaluable.

Great Blue Heron, Ardea herodias

White Ibis, Eudocimus albus

We saw no rarities, but that did not detract from the adventure.  A Bald Eagle perched high on a tall pine bade us adieu as we entered the swamp.  The most common birds were egrets, herons, and ibises, with an occasional kingfisher.  I have yet to see a Mangrove Cuckoo.  We packed subs from Subway and passed the perfect sandy island on the way in, with plans to stop for lunch there on the return trip.  But time and tides wait for no man and we settled for lunch standing on this submerged island in 12 inches of water a few hours later.  It was still welcome food and a chance to stretch.

Bald Eagle, Haliaeetus leucocephalus

There are no mangroves in the Chesapeake Bay.  My Eastern Shore is characterized by uncountable tidal creeks, ideal for kayaking.  These are not your typical babbling brooks one thinks of as a “creek”, but rather wide, sometimes as wide as a half mile, of irregular fingers of the vast shallow estuary.  Think oysters, crabs, bluefish and rock bass, as well as sailing and kayaking.

Willey’s Island

My local destination is usually Willey’s Island, one of the bay’s many disappearing islands.  People tell me that at one time there was an active farm on the property.  I have watched it shrink for 20 years till now its just several sand spits, and small surviving uplands with its shore littered by fallen trees.  More succumb with each storm.  There was a single majestic pine on one end of the island, a favorite perch of a local Bald Eagle.  It now has died, has wet feet, and will topple over soon.

The Eagle Tree

The rising sea level is not the only explanation for the disappearing islands.  I’m told that the land itself is actually sinking due to deep geologic events.  These factors together have made these silt and clay islands vulnerable to shoreline erosion.  There are no stabilizing natural rocky shores in the Chesapeake Bay.

Toppled trees along the shoreline

My recent kayak trip to the island showed that a Cormorant had taken over my dying Eagle tree.  Chattering Least Terns are more numerous than Forster’s this year, and I wonder where all the sea gulls have gone.  Most years we’re overrun with Ring-billed and Laughing Gulls by now, but this year, nary a one.  My clean dock is evidence of this.  The Osprey continue to increase in number.  There is a housing crisis for them with now almost every channel marker sporting a nest, even the triangular red markers with the pointed top.

Nesting Osprey

A birder has a subliminal urge to keep birding in some form, to fight the passage of time.  Older legs may no longer be able to scale the peaks to see the alpine birds, or endure the transoceanic flights to other continents.  Florida’s mangroves are under development pressure and the Chesapeake’s islands are disappearing.  The birds are adjusting and evolving, but the rate of change seems to be accelerating and some may not survive.  The time, tide, and birds wait for no man.  Good birding, while you can, and try out a kayak.