The feathers of a bird are, for their weight, among the strongest structures in the world. The bones of this Magnificent Frigatebird weigh less than its feathers! To further reduce weight while maintaining strength, many bird bones are fused. In addition, the pectoral and pelvic girdles…

Bird song caught the ear of Italian composer Antonio Vivaldi. And he even named a 1729 flute concerto for a bird — the goldfinch. The source of inspiration for Vivaldi's Goldfinch concerto, or Il Gardellino, was the European Goldfinch, a tiny bird found throughout much of Europe, where it…

When we watch birds in flight, they’re often seen against a backdrop of clouds. Clouds have many different types and are listed in the International Cloud Atlas. The asperitas cloud was first described by citizen-scientists and has now been incorporated into the official atlas.

The most distinctive characteristic of the California Quail is the black, forward-facing topknot that juts out from its forehead like a small flag. The California Quail – the state bird of California – builds its nest right on the ground. Almost immediately after hatching, the precocial…

One of the world champions of long-distance migration is the Arctic Tern. Arctic Terns nest across the far northern reaches of the continent during our summer, then fly south to Antarctica for the rest of the year. Some will circle the polar ice-pack before heading north again, completing…

The Swainson's Warbler is one of North America's shyest birds. These birds forage quietly on the ground, flipping over leaves to expose and capture insects. They scurry away, calling in alarm when big-footed humans invade their shadowy habitat. On their wintering grounds, in the Blue…

Roger Tory Peterson, the best known American figure of 20th Century birdwatching, offered help on birding by ear. Whenever he could, he provided a catchphrase to identify a bird's song. "Witchety-witchety-witchety" captures the song of this Common Yellowthroat. The California Quail seems…

If you're near High Island, Texas in the spring, you might witness a "fallout," one of the great spectacles of bird migration. Thousands of birds, including Rose-breasted Grosbeaks, orioles, Painted Buntings, and warblers of all kinds, as well as tanagers and Indigo Buntings, like this one…

Happy Mother's Day, from the whole BirdNote team! Avian motherhood is a mixed bag. Peregrine Falcon mothers share duties fairly equally with Peregrine dads. At the other end of the spectrum is the female hummingbird, which usually carries the entire burden of nesting, incubating, and…

Sailor and artist, Brechin Morgan, circumnavigated the globe solo. Alone on the vast expanse of the Pacific Ocean, he welcomed the companionship of a Swallow-tailed Gull, flying off of the bow stay in front of the boat, like a little shadow of moonlight floating back and forth, almost all…