Archive | BirdWords

Floating Dinosaur Birds

American White Pelican

American White Pelican

What California bird weighs five pounds more than our ten-pound eagles, has a wingspan two feet longer than the eagles’ seven feet, and a beak twice as long as a great blue heron’s? What bird is rumored to eat its own young, and also to feed its young with its own blood? What bird is noted in a 1910 poem by Dixon Lanier Merritt as wonderful because “His bill will hold more than his belican”?

Yes, the bird is the American White Pelican. (And yes, the poem is by Dixon Merritt, not Ogden Nash.)

These old birds, with fossil relatives going back half way to the dinosaurs, are shy of people, and remain an infrequent sight in Shasta County. But they are here. They nest along the shallow lakes of north-eastern California, and they winter even closer, throughout the Sacramento River Delta. Occasionally we spot them.

American White Pelican Group In Flight

On a quiet summer day they might float high overhead. They typically proceed in a silent group of fifteen or so, with not a single one of them deigning to speak or flap a wing. Their long bills spear forward like a pteradactyl’s; their motionless, extended wings show black flight feathers on otherwise snowy plumage. They hang in the summer-blue sky, still as pallbearers, seeming beyond the rule of something as mundane as gravity.

But of course they are fellow Earthlings, and sometimes will tilt Earthward and glide severally into a water-ski landing on a shallow lake. They prefer shallow lakes because of their feeding style.

Brown Pelican Dive

Brown Pelican Dive

Their coastal cousins, the brown pelicans, plunge into the water and scoop a beak-full of ocean and, they hope, stunned fish. White pelicans, on the other hand, paddle along the surface to find their food. Frequently they group together to swim-herd fish into shallow coves, where they can more easily scoop a mouthful of prey, either from their normal floating position or by tipping tail-up like a mallard. White pelicans will swallow salamanders and crawdads, but they mostly dine on warm-water fish like carp and minnows.

Each spring, the adults’ beaks brighten from yellow to orange, and they develop a rounded ornamental fin on their upper bills—an accessory that perhaps one must be a pelican to admire. The mated pair scrapes out a hollow in sand or gravel where the female lays 2-3 eggs. Only one of the young will usually fledge. Their in-nest competition is fierce.

While incubating or otherwise resting, pelicans often tuck their bills down their front sides. It may be this habit and the red-orange bill of the breeding season that fostered the mistaken myth that adult pelicans feed the young their blood. They do not.

American White Pelican Resting

As for the grisly tale that parent pelicans eat their offspring: adult pelicans do not carry food to their young in their pouched beaks. They swallow the food and then regurgitate it for the nestling. On its part, the baby stimulates regurgitation by sticking its own beak down its parent’s throat. The scene looks very much like the parent is eating its baby, head first. The feeding practice and the tale it inspired are primitive and perhaps galling; but the unpretentious dining style seems to have worked for 30 million years.

White pelicans declined for the first half of last century, perhaps in part due to the loss of a major nesting rookery when the progenitors of the Westlands Water District drained Tulare Lake, which at the time was the largest lake surface west of the Mississippi. But now the pelicans are recuperating—into new trouble, expanding into the southeast where catfish farms create rich feeding grounds.

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Homes for Birds, Yard by Yard

Hermit Thrush

Hermit Thrush

For birds, yard after yard after yard adds up to a lot of potential homes. Backyard sanctuaries are pleasant for people, too, and fairly easy to provide. Just consider the basic elements of habitat: food, water, and shelter.

Providing food does not require filling feeders. Feeders can be fun because they draw birds for easy viewing, but they also require periodic cleaning to minimize spreading disease—say, once a month with a nine to one water to bleach solution. Hummingbird feeders require cleaning and refreshing every 2-3 days in the summer.

Plants will feed birds with less fuss. Berries and seeds on shrubs, grasses, and trees are all natural food supplies. Flowers, especially tubular ones like fuchsia and penstemon, offer nectar to hummingbirds. Benign neglect of gardens leaves old seedheads for winter consumption and unraked leaves for scratching through for the food they hold. Even without bird-edible fruits and seeds, plants feed insects, which become the main source of protein for songbirds around the world. Native plants are usually best, as they have evolved with the birds and insects of the area and usually support them most effectively.

Cedar Waxwing and American Robin

Cedar Waxwing and American Robin

Of course, avoid pesticides and herbicides. At worst they poison the birds, and at best they kill off the birds’ food source.

Plants also offer shelter. Some birds roost high in trees, others in shrubs, still others on the ground under brush. If décor and fire safety call for pruning up, consider retaining some low shrubbery for sparrows or quail. Woodpeckers carve numerous holes in dead wood, creating homes used by many bird species. You may choose not to leave whole snags standing, but just a standing trunk can invite excavations that bluebirds, wrens, flycatchers, titmice, nuthatches, and swallows will readily use.

Western Bluebird Male

Western Bluebird Male

Those familiar cavity-nesters will also use home-made nesting boxes. To find bird-house directions, at wintuaudubon.org see Places to bird/Attracting birds. In our area, it’s best to mount your birdhouses in shaded areas.

Ash-Throated Flycatcher

Ash-Throated Flycatcher

Of course, ensure that your yard is as feline-free as possible. Outdoor cats kill 15-20% of North American birds every year, including nearly 50% of suburban fledglings.

Water remains the elixir of life. A shallow pan, refreshed every day, makes an easy start. A trickle of running water invites many more visits. Small pumps are inexpensive and can run a home-made fountain if electricity is safely available. For permanent pools, mosquito-fish are available from Shasta County at (530) 365-3768.

Consider commercial fountains carefully. Songbirds prefer shallow puddles; a sloping edge will accommodate birds of different sizes for both drinking and bathing. Steep edges inhibit use.

Ruby-crowned Kinglet

Ruby-crowned Kinglet

Birds have lost vast swathes of former habitat. The wildfires are hardly the worst of it. If we can curb the super-sizing of them, fires are natural, and the cycle of light burn and fresh regrowth benefits many species. The more devastating disruption is the permanent and widespread habitat conversion of historical oak woodlands, wildflower fields, and riparian meanders into row crops, monoculture orchards and tree farms, pavement, and buildings. Now climate change is expected to further eliminate half the seasonal range of 314 North American bird species. It’s a tough time to be dependent on an ecosystem.

We can shape our yards to offer the food, water, and shelter that will help many birds still find homes.

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A Thanksgiving Celebration                           of the part of the bird we don’t eat

Peregrine Falcon

Peregrine Falcon

Bill, neb, schnoz – whatever it’s called, a bird’s beak is its second most important appendage after its wings. Since birds’ upper limbs are devoted to flight, the beak is vitally important in manipulating objects for feeding and nest building. Although some species are able to use feet for those purposes, many rely entirely on their bills.

The upper and lower mandibles comprising the beak are bony structures covered with keratin, a substance similar to human fingernails – and also similarly, constantly growing. The keratin layer may be very rigid and powerful as in the woodpeckers, whose beaks can drill nest holes or tease out insects in hardwood trees. In some species such as puffins and White Pelicans, the keratin forms projections during breeding season, presumably to enhance their attractiveness to prospective mates. These ornaments are shed after nesting time.

Icthyornis dispar

Icthyornis dispar

So, how did the toothed jaws of ancestral dinosaurs become transformed into modern beaks? A strong hint is offered by the recently reconstructed fossils of an ancient sea bird, Icthyornis dispar, that lived alongside dinosaurs 87 to 82 million years ago. Although it had dinosaur-like teeth, its long, narrow jaw was tipped by a tiny beak that it could have used like tweezers to grasp objects. The scientist that led the effort to reconstruct this bird said that it pecked like a bird, but bit like a dinosaur.

Red-breasted Sapsucker

Red-breasted Sapsucker

Over the millennia since then, adaptation to many different foods and environments has led to the vast variety of bills seen in modern birds. Form follows function, and so we have finch and sparrow beaks that act as crackers for seed-opening; eagles with shredders to tear apart meat; woodpeckers with chisels to bore into wood for insects; hummingbird probes used to reach into flowers for nectar; heron and kingfisher spears for skewering fish or frogs; and the warblers’ tweezers for grabbing insects. Not all birds have beaks specialized for a single purpose – the omnivorous crow has a versatile beak that all by itself can be likened to a Swiss army knife.

American Crow

American Crow photo courtesy of Ingrid Taylar

Most birds have little or no sense of smell, but there are notable exceptions. Vultures find the carrion they eat by odor – a characteristic taken advantage of by oil pipeline companies. By including a decay molecule in the crude oil, oil companies attract a cloud of vultures to leaks. The vultures, in turn, are followed by pipeline tenders with repair equipment. At sea, the tables are turned. Some seabirds can follow an odor plume to locate dead fish – and in this case the birds take advantage of the humans to detect fishing boats and their discards.

Generally, nostrils are on the part of birds’ beaks close to the head. However, New Zealand’s distinctive kiwi has nostrils near the tip of the beak where its well-developed sense of smell helps it find the insects and earthworms that it eats in the leaf litter.

Kiwi

Kiwi

The flamingo feeds in a manner as distinctive as its tropical appearance. It partially submerges its beak in prey-rich water, holding it upside down so that the upper mandible is below the lower mandible. It draws in large amounts of water and sieves out small organisms by means of hair-like projections on its beak. Thus, it is a filter-feeder, a characteristic it shares with baleen whales and oysters!

American Flamingo

American Flamingo

Our familiar hummingbirds have tropical cousins with amazingly long or fantastically curved beaks that match the corolla tubes of the flowers they feed from. Scientists who study them think that they are partnered in an “arms race” against other flowers and birds. As the flower and the hummingbird team becomes increasingly matched to just each other, they become physiologically committed to just their unique flower-bird relationship, and they exclude other species from their activity. It is as if they are in a long process of being wedded to each other.

Anna's Hummingbird

Anna’s Hummingbird

You don’t have to travel to exotic places or visit zoos to see these amazing beaks in action. Notice the different ways the house finches and the nuthatches that visit your feeders get into the seeds that they eat. Look at the bills of the birds in your yard – do they look like tweezers, probes or chisels? Then watch and see how the bird uses its beak. This makes another way to enjoy the birds around us.

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There’s Gold in Them Thar Hills!

Golden-crowned Sparrow

Golden-crowned Sparrow

Alas, it seems the miners of 160 years ago missed out on most of it. The Golden State holds so much more amber wealth and beauty than just the lustrous mineral.

Golden hues deck our world liberally, often with ephemeral but recurring glory and ache. They join with pinks and grays to brush our skies at dawn and dusk. In spring they gleam from the soft petals of poppies and the burry stripes of the bees who visit them, and the sweet honey that those two together produce; in fall, the hills and fields of dried grass, especially under sun after rain, glow goldenrod, and maples and oaks effuse geysers of leaves radiant with mustard and ochre and burnished apricot; blonde cider flows from foothill orchards, and under foothill streams trout flash their brilliance. Gold shines in the eyes of blackbirds and eagles, and in bright braids from sun-dappled rivers and lakes; and this time of year, every year, from the optimistic caps of brown little birds, like something hopeful in the miner’s pan.

Golden-crowned Sparrow

Adult Golden-crowned Sparrow

Golden-crowned sparrows are mostly a camouflage of browns and grays, perfect for hiding in under-brush shadows. But like so much of life, they have their shine, too—just a modest dash of color, for them. Adults wear their golden crowns offset with a circlet of black. Young birds sport a smaller, paler spot of yellow, bordered not by black but a nondescript earth tone, like last year’s leaves. Some observers note that the pinkish bill of young birds goes gray with age, starting with the upper mandible.

Golden-crowned Sparrow

First Winter Golden-crowned Sparrow

These sparrows have been northward throughout the summer months. Denizens of the west, they nested from northern British Columbia up into Alaska, as far as the Arctic Circle, where, tucked among grasses and shrubs in boggy meadows, they wove a dense cup lined with feathers or moose hair, perhaps just above spring snow but most often on the ground. They raised a clutch or two with about four eggs in each.

Golden-crowned Sparrow

First Winter Golden-crowned Sparrow

Now both parents and fledglings have flown south, centering their winter range right here in northern California. They can be seen at backyard feeders, although they are generally wilder and scarcer than their racier, more numerous cousins, the white-crowned sparrows.

White-crowned Sparrow

White-crowned Sparrow

Like many sparrows, golden-crowns have a beautiful voice. In our brushy yards and hillsides they can be heard on sunny winter mornings, singing a clear Oh, dear, me! that manages to be both woebegone and beautiful.

Studies on these birds are few, but the sparrows are part of recent measurements of mass bird migrations. Weather radar, with increasing precision, has in the last several years harvested information on not just storm clouds but on clouds of birds. The researchers report spring migrations over the US/Canada border at about 2.6 billion birds. The return trip, coming south in autumn with a new season of surviving fledglings, numbers about 4 billion.

Those nesting seasons are immeasurably valuable. They keep the gold recurring in California.

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A Burning Question Beyond a Bird’s-eye View

Osprey Covering Young

Osprey Adult Shading Young

Something’s wrong, and the birds can’t figure it out. Day to day and year to year, it’s hotter. The birds go about their daily lives as they always have, and their days are too few, their minds too scripted, to even see that there’s a change. But they pant more. Vigor wanes, and they sing less. Rather than snuggling down to warm their eggs and chirp gently to the young inside, they stand over the eggs to shade them. Nestlings die from dehydration and heat exhaustion.

And then the fires hit. Most nestlings had already fledged this year, so at least for the mobile songbirds, and probably for most of the quail, turkeys, grouse, and roadrunners, too, escape was possible—a little by foot, and a lot by flight. Of course not all survived the firestorms, but Shasta Wildlife Rescue and Rehabilitation reported a single avian burn victim, a Great-horned Owl with scalded feet.

Carr Fire Burned House

Where did they fly? People who lost their homes might be able to tell you: wherever they could. But housing grows short. Even where humane values are diligently exercised there is upheaval. And birds are not particularly humane. They are birds, after all, not people.

Even with their best quail-like fellowship, they must crowd into smaller areas where there is still water to drink and vegetation to support the insects they feed on. But not all those places are seasonally ready to support them. The berries may not have ripened, and the fall salmon are not yet decaying along the riverbanks. Disease spreads more readily.

American and Lesser Goldfinches

Then comes the smoke. Most birds don’t live that long, so they may be protected from longer-term ailments like lung cancer. But like children they breathe quickly, so are probably more prone to asthma and bronchial infections, and may suffer similarly with reduced lung, heart, and brain functions.

People try to cope. We don N95 masks, or pretend we’re too rugged or bully to need them. Homeowners negotiate with insurance companies. The Chamber of Commerce and the EDC advertise business relief loans.

Birdhouse In Burn

The feathered things cope more primitively. They fly. They cannot make complex plans, or contemplate next year, or the likelihood of more heat, or the reality that their homes and livelihoods are gone up in smoke, leaving skeletons of trees and dead ash on the ground that once sustained them; or consider the years and generations following, and how the hundreds of thousands of acres burned and the millions more wilting in heat and drought will change resources for food or housing or the animal joy of singing.

Birds don’t have the capacity to grasp or modify the underlying conditions that cause suffering—to address resources with a deliberate eye to health, wildlife, a sustainable economy, climate change, and general well-being. They can’t discern the world beyond their own visceral and short-term needs. The burning question is, can we?

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