Ornithologist Bill Evans has helped us better understand the sounds that birds make as they migrate at night. Known as nocturnal flight calls, many species can be identified based on their signature sound. Using special handmade microphones left outside overnight, Evans, his colleagues and many volunteers recorded countless nocturnal flight calls — and not all of them have been identified yet. In this show, revel in the beauty of the calls that birds make as they fly high in the air.

More info and transcript at BirdNote.org. 

Want more BirdNote? Subscribe to our weekly newsletter. Sign up for BirdNote+ to get ad-free listening and other perks. 

BirdNote is a nonprofit. Your tax-deductible gift makes these shows possible.

Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.

Vampire Ground-Finches menace their victims in broad daylight, stabbing holes in their flesh, then devouring the blood. During the dry season, when their usual diet of seeds can be scarce, they turn to large seabirds, like boobies. Fluttering onto a booby’s back, the finch jabs its sharp beak in among the feathers until blood flows, making a meal of it. Why boobies tolerate this remains a mystery.

More info and transcript at BirdNote.org. 

Want more BirdNote? Subscribe to our weekly newsletter. Sign up for BirdNote+ to get ad-free listening and other perks. 

BirdNote is a nonprofit. Your tax-deductible gift makes these shows possible.

Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.

No bird is better adapted for climbing up a tree trunk than a woodpecker. The foot of this Pileated Woodpecker is ideal for clinging, and its relatively short legs allow it to anchor itself securely. When traveling upward, the woodpecker’s a master. But hitching down? Not so much — usually they will fly. Nuthatches, however, can easily go up and down. This White-breasted Nuthatch walks over the bark of trees by grasping with one leg while using the other for a prop. It also has a rear-facing toe equipped with a long, sharp claw that’s ideal for hanging on while heading downward.

More info and transcript at BirdNote.org. 

Want more BirdNote? Subscribe to our weekly newsletter. Sign up for BirdNote+ to get ad-free listening and other perks. 

BirdNote is a nonprofit. Your tax-deductible gift makes these shows possible.

Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.

The Cinereous Mourner is a small, ashy-gray bird that lives in the forest understory of the Amazon Basin. And it’s taking mimicry to the next level: when viewed from above, lying alone in its cup-shaped nest, its chick is a near match to a highly toxic caterpillar — one that snakes and monkeys won’t eat. The chick even waves its head like a caterpillar, increasing the illusion.

More info and transcript at BirdNote.org. 

Want more BirdNote? Subscribe to our weekly newsletter. Sign up for BirdNote+ to get ad-free listening and other perks. 

BirdNote is a nonprofit. Your tax-deductible gift makes these shows possible.

Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.

Every bird species uses its wings a little differently, and some are specialized for highly efficient flight. But that means going without other abilities. Swallows and hummingbirds (like this Talamanca Hummingbird) capture their food on the wing, but they can’t walk. Swifts, which are acrobatic in the air, can’t even perch. Yet they dazzle with the maneuverability made possible by their aerodynamic bodies.

More info and transcript at BirdNote.org. 

Want more BirdNote? Subscribe to our weekly newsletter. Sign up for BirdNote+ to get ad-free listening and other perks. 

BirdNote is a nonprofit. Your tax-deductible gift makes these shows possible.

Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.

Surf Scoters are perfectly at home in the element they’re named for. They swim smack in the middle of what surfers call the impact zone: Just where the waves break with greatest violence. Why risk the harshest waves when there’s calmer water close by? Because the churning action of crashing waves can expose the small clams and crabs that scoters eat. And how do Surf Scoters avoid getting mashed by the sea? When a towering wave is about to crash down, the scoter deftly dives and swims under the crest of the foaming breaker, then pops up on the other side.

More info and transcript at BirdNote.org. 

Want more BirdNote? Subscribe to our weekly newsletter. Sign up for BirdNote+ to get ad-free listening and other perks. 

BirdNote is a nonprofit. Your tax-deductible gift makes these shows possible.

Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.

Pigeon Pose. Crow Pose. Eagle pose. Bird of paradise. Writer Trisha Mukherjee, who is also a yoga teacher, discusses the connections these bird-inspired yoga poses have with Hindu mythology and philosophy.

More info and transcript at BirdNote.org. 

Want more BirdNote? Subscribe to our weekly newsletter. Sign up for BirdNote+ to get ad-free listening and other perks. 

BirdNote is a nonprofit. Your tax-deductible gift makes these shows possible.

Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.

When it comes to nests, common sense suggests that large birds build large nests, and small birds build small nests. But in fact, some species of smaller birds build large nests. None, though, builds anything like the communal structures of Sociable Weavers in southern Africa’s arid plains. These House Sparrow-sized birds often live in accommodations with room for up to 500 birds. Each family has its own access hole and tunnel into a chamber within the larger complex. Some structures have persisted for more than 100 years, with constant occupation by succeeding generations. 

More info and transcript at BirdNote.org. 

Want more BirdNote? Subscribe to our weekly newsletter. Sign up for BirdNote+ to get ad-free listening and other perks. 

BirdNote is a nonprofit. Your tax-deductible gift makes these shows possible.

Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.

Ornate Hawk-Eagles stand out from other raptors with their impressive crest that looks like an elegant crown in adults, and a punk hairdo over the white-headed and black-bodied juveniles. These birds are excellent hunters, but they’re also devoted parents.

More info and transcript at BirdNote.org. 

Want more BirdNote? Subscribe to our weekly newsletter. Sign up for BirdNote+ to get ad-free listening and other perks. 

BirdNote is a nonprofit. Your tax-deductible gift makes these shows possible.

Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.

Yellow-eyed Juncos sometimes make a migration of sorts — not from north to south, but from the high mountains to the lowlands or the other way around. It’s called altitudinal migration. In the warm summer months, some Yellow-eyed Juncos prefer to nest at higher elevations, while in winter, the scarcity of food pushes them back down to the valleys.

More info and transcript at BirdNote.org. 

Want more BirdNote? Subscribe to our weekly newsletter. Sign up for BirdNote+ to get ad-free listening and other perks. 

BirdNote is a nonprofit. Your tax-deductible gift makes these shows possible.

Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.