The annual Great Backyard Bird Count, February 12-15, 2021, is sponsored by the Cornell Lab of Ornithology. Birdwatchers across the country count birds and then report the numbers on-line. Although it may seem that crows are everywhere, the Northern Cardinal is reported on the most lists…

Rachel Carson's Silent Spring, which came out in 1962, linked the pesticide DDT to the decline of many birds, including songbirds. But Peregrine Falcons and other raptors had declined, too. When the birds ingested DDT, it caused their eggshells to thin and break under the weight of the…

The tranquil song of the Kaua'i O'o graced the high, dense forests of Kaua'i until 1987, when it was heard no more. The voice of only one member of this family of birds, now all extinct, remains immortalized on tape. The Macaulay Library maintains the largest collection of bird sounds in…

Birds' legs have an adaptation called "rete mirabile" that minimizes heat loss. The arteries that transport warm blood into the legs lie in contact with the veins that return colder blood to the bird's heart. The arteries warm the veins. Because the veins also cool the arteries, the bird’s…

Project FeederWatch, sponsored by the Cornell Lab of Ornithology and National Audubon, is a window on the birds of winter. Through Project FeederWatch, scientists are able to track the movements of birds - including this Pine Siskin - and understand trends in population and distribution…

Traveling "as the crow flies," eating "like a bird," and being "free as a bird" are just a few of the sayings we use to describe everyday human actions and feelings. But these often don't take into account the birds' real activities, relative to their size. Support for BirdNote comes from…

The Cree call the full moon in October "The Moon of Falling Leaves." It's almost time to stow the tools and put the garden to bed for the winter. When the trees lose their leaves, you can see the nests of summer. It's a good time to prune trees, because you won't disturb nesting birds. If…

The Merlin Bird ID smartphone app from the Cornell Lab of Ornithology is a free, easy way to help you identify new birds. The app asks a series of simple questions and offers a list of possible birds, along with photos and sounds, to help your identification. The app draws from millions of…

The male hummingbird leaves the female to build the nest and raise the young alone, but other father birds are more involved. A Peregrine Falcon father shares duties almost evenly with the mother. (Stewart, seen here, nested on a Seattle skyscraper for many years.) But the male Emu of…

Just because a young bird appears to be alone – whether on the ground or squawking loudly from a bush or tree – doesn't necessarily mean it is sick or injured. In June, young birds, including this juvenile Northern Flicker, are leaving their nests. And most likely, a parent is near-by and…