David Sibley, creator and illustrator of The Sibley Guide to Birds, offers this advice to people learning to identify birds: “Spend time at home, paging through the field guide . . . by flipping through the pages of the book and looking at pictures and reading the names, you’ll start to…

In the Arctic National Wildlife Refuge, June days offer almost continuous daylight to breeding birds, including this Black-bellied Plover. At this high latitude, Black-bellied Plovers can complete their breeding cycle in a month and a half. Not long after the summer solstice, the adults…

Baby Bald Eagles have a lot to learn before they reach adulthood. While still in the nest, they practice fanning their wings and jumping into the air to test their strength. When they’re finally ready for their first test-flight, the fledglings sometimes land unceremoniously on the ground…

High in the mountains of Chiapas, the southernmost state of Mexico, a male Highland Guan is performing his territorial display. The Highland Guan perches on a tree-branch, whistles, and then glides on vibrating wings. The resulting wondrous sound is like no other. The bird’s display…

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…