BirdNote

La mayoría de las aves mudan y regeneran sus plumas de vuelo, una a la vez en cada ala, para mantenerse en óptimas condiciones para volar. Pero para el albatros viajero ( Diomedea exulans), que tiene una impresionante envergadura de entre 3 y 4 metros, ¡es un gran desafío! A los albatros más grandes

The ability to fly seems to define birds. But there are more than 50 species of flightless birds throughout the world — from the Ostrich and Kiwi to flightless rails, ducks, and this Humboldt Penguin. Why did they evolve the inability to fly? Many dwelt on islands. Others evolved until they were

Kelsen Caldwell drives a bus in and around Seattle for King County Metro. As a bus driver, sometimes there’s downtime if your bus is moving too fast. What do you do with all that extra time? If you’re Kelsen, you fall in love with birds.

Chickadees are tiny songbirds named for their characteristic song and there are seven species found in North America. You'll find the Black-capped Chickadee across the northern US into Canada. The Carolina Chickadee holds sway in the Southeast. Hear the husky voice of a Mountain Chickadee in the

Sapsuckers drill small holes in the bark of favored trees, then return again and again to eat the sap that flows out. And hummingbirds, kinglets, and warblers come to the sap wells to eat the insects trapped in the sap. Although a sapsucker, like the Red-breasted Sapsucker pictured above, may suck a

Most of the bird sounds you hear on BirdNote come from the Macaulay Library, a vast collection of over one million bird calls and songs curated by the Cornell Lab of Ornithology. The library relies on both professional field recordists and dedicated volunteers to capture the sounds of birds all over

Before the high-tech gadgets used to track bird migration today, there was moon-watching: a technique dreamed up in the 1940s by ornithologist George Lowery. Using telescopes pointed at the moon to see the silhouettes of migratory birds, Lowery helped show that birds regularly migrate across the

Corvids, like crows and jays, are known for caching seeds instead of eating them immediately. Sometimes, those seeds take root before the birds return. Mario Pesendorfer, a forest and behavioral ecologist at BOKU in Vienna, says that’s what happened on Santa Cruz Island in southern California. It’s

Las estrellas parecen girar en el cielo, lo que plantea una gran pregunta: ¿cómo logran las aves usarlas para orientarse durante la migración? El ornitólogo Stephen Emlen llevó azulillos índigo ( Passerina cyanea), también llamados colorines azules, a un planetario y observó sus movimientos mientras

The stars appear to rotate in the sky, raising the question of how birds can use stars to navigate during migration. Ornithologist Stephen Emlen brought Indigo Buntings to a planetarium, tracking their movements as the simulated night sky changed above them. The buntings oriented themselves using