A bird known as Titanis walleri made its home in Florida just a few million years ago. Titanis, as its name suggests, was titanic indeed — a flightless predator, 5 feet tall, with a massive hooked bill. Titanis and other birds related to it belong to a group some paleontologists call the "terror birds." They were dominant land predators in South America for tens of millions of years. Paleontologists still aren’t clear about why Titanis and its kin went extinct. But whatever factors ended the era of the terror birds also made it a lot less risky to go out and fill your bird feeder.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 a 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.

To hear a Common Loon in the wild during summer, you’ll need to find a northern, freshwater lake where a pair is nesting. But to find that same Common Loon in winter, you’ll likely need to look on a saltwater bay. This shift from fresh to salt water would kill most animals. But loons — along with many ducks and other water birds — have evolved to make that move. It’s possible that breeding adults nest on fresh water in order to save their energy for raising chicks.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 Wall of Birds at the Cornell Lab of Ornithology is a towering mural showing nearly 250 life-sized birds across a map of the world. To complete the impressive artwork, artist and scientific illustrator Jane Kim spent 17 months painting day in and day out. Though the experience was often solitary, Jane stayed connected to the outside world through the sounds of wildlife in the nature preserve that surround Cornell Lab.Read more about Jane Kim and the Wall of Birds in Field Notes!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.

Writer and ornithologist J. Drew Lanham shares a note he has written to a Dark-eyed Junco, which he fondly nicknames “snowbird.”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.