Birdnote

Northern Cardinals are known for their iconic red feathers, yet that scarlet hue is actually derived from yellow pigments in their food. Most cardinals’ bodies transform those yellow pigments into their signature shade of red, but some lack this ability — resulting in a bright yellow bird. House Finches, Red-bellied Woodpeckers, and other notably red species can also develop an unexpectedly golden complexion. So keep an eye out for all the shades of variation in well-known birds.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.

Red-tailed Hawks typically have a nesting territory of about a half-mile to a full square mile, depending on how much food there is. Bald Eagles’ nesting territories range from 2½ square miles to as much as 15 square miles, for the same reason. But the Gyrfalcons in Finland and Scandinavia really need their space!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. 

Everybody’s heard of a gaggle of geese and a covey of quail. But what’s a group of penguins called? And a “conspiracy” of ravens? Maybe the way we label birds says more about us than it does about them.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. 

Collecting data on wild birds is crucial for their conservation. But it requires huge amounts of effort. One way to help streamline the process is with gizmos called autonomous recording units, or ARUs. For days or months, these recording devices eavesdrop on the environment around them, including the songs and calls of the local birds. Identifying the songs picked up on recordings can be almost as time-consuming as in-person field work, but new AI tools are quickly making it easier to analyze the audio.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. 

Sometimes all you need to identify a bird is a single feather. Because collecting bird feathers is prohibited in the U.S. to protect birds from poachers, start by taking a photo with a common object for scale. Then you can use online resources like the iNaturalist app or Featherbase website to help you solve the mystery. Keep your prime suspect in mind when you’re back where you found the feather and you might get to see the bird itself — feathers and all.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. 

The challenge of learning which gull is which brings to mind a crossword puzzle. Take in all the clues, and come up with the right answer. For identifying gulls, we recommend a good bird book, binoculars, perhaps a thermos of hot coffee, and maybe a chair. So which gull is this? Large gull, dark back, pink legs, seen in the West. This one is a Western Gull!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. 

Around this time of year, Common Mergansers cross the U.S.-Canadian border on their way to wintering grounds in the Lower 48. But how do they know when to go? Ducks are well insulated against frigid winter temperatures, but mergansers can find their fishy prey only by diving below the surface of open water. So they’re doing just fine, resting and feeding in southern Canada, until a thin veneer of ice forms on their lake, signaling the time has arrived to head south!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. 

Every year, hundreds of bird species migrate between North and South America. Some species likely evolved from ancestors that moved north in search of new breeding habitats: the “southern home” hypothesis. But others may have extended their winter ranges south: the “northern home” hypothesis. Many birds have likely gained and lost the ability to migrate multiple times over the course of evolution. And it’s still happening today.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. 

Window collisions kill nearly one billion birds every year in the U.S., with many fatalities occurring during spring and fall migration. Judy Pollock, president of the Chicago Bird Alliance, says this problem has a solution: using bird-safe glass or applying a tight grid of decals to existing windows to make them easier for birds to see.Though many building owners are reluctant to make these much needed changes, Judy and her collaborators are advocating for a city-wide ordinance that would require new construction and major renovations in Chicago to use bird-safe glass. Learn more about Bird-Friendly Chicago in our latest episode of Bring Birds Back.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.

In the tidal marshes of the East Coast, the Saltmarsh Sparrow has a breeding strategy described by scientists as featuring an “obligate, promiscuous, and bond-free relationship between males and females.” That means both sexes copulate with multiple individuals, without a lasting relationship. The female is singularly responsible for nesting and hatching and drives off males that approach while she is raising her young.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. 

As a young child, Kenn Kaufman ventured into his neighborhood in search of the tigers, bears, and dinosaurs, but quickly found that Indiana doesn’t have those. So he set his sights on the next best thing: figuring out which birds were in his family’s yard. Though he’s now a world renowned birder and field guide author, he says his progress was slow. Today’s novice birders have access to mobile apps and websites that put photos, bird calls, and range maps at your fingertips. But whatever tools you choose, Kenn says there’s no substitute for getting outside and experiencing the birds for yourself.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. 

Because of invasive species and climate change, many of the native birds of Hawai‘i are endangered or have gone extinct. Sam ‘Ohu Gon, Senior Scientist and Cultural Advisor for the Nature Conservancy of Hawai'i, says the bright red bird called the ‘i‘iwi holds a special place in native Hawaiian culture. The bird’s feathers appear as the red color in traditional Hawaiian featherwork. Preserving the bird means preserving the strong cultural relationship with the species.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. 

As the colder months arrive, birds that remain in northern climates face the harsh realities of staying warm and finding food. Some birds approach the food problem by storing it in advance — a behavior called caching. Chickadees, nuthatches, jays, and some woodpeckers are known to cache large supplies of seeds in many places. But what enables birds such as this Black-capped Chickadee to find the seeds they’ve stored? They amplify spatial memory.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. 

A flock of small shorebirds, like Western Sandpipers, twists and turns, glittering in the sky. When threatened by a falcon, these birds take to the air, flying so close together that it's hard for a predator to capture one. A bird at one edge turns toward the middle, and a wave sweeps across the entire flock in less than a second.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. 

The American Wigeon is a grazer. Its bill is narrow, with a pointed tip like that of a goose. When feeding on water plants, a wigeon grabs a leaf and rips it off with its strong bill, rather than using the straining apparatus typical of dabbling ducks. Take a field trip with your local Audubon and see if you can spot a wigeon.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.

In the UK for years, milk came in bottles with foil caps. Great Tits, a common songbird, learned how to peck through the foil. The skill spread. But how? Researchers trained Great Tits in different ways of opening a box and re-released them. Knowledge of how to open the box spread rapidly, with most birds copying the trained bird in their group. In a follow-up study, the researchers made one method of opening the box more effective. Many birds quickly switched to the better method, suggesting the tits can stand up to peer pressure if they see there’s a better way of doing things.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. 

Put your winter garden to work as a haven for birds. Leaves and brush left to compost provide foraging and roosting places, smother this year’s weeds, and feed next spring’s plant growth. Watch for juncos and towhees in the leaf litter and wrens in the brush. Maybe even a Song Sparrow! With a little planning, your garden can be a haven for birds year round.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.

When Chidi Paige moved from Nigeria to the U.S., she began running a youth STEM program and had to teach lessons on bird identification. She was in for a challenge: she had to learn the local bird species quickly. On a birding trip, she spotted a Yellow Warbler in a pine tree. The beautiful warbler got Chidi hooked on birding. She has designed several games to make learning bird identification fun for kids.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. 

When a male Indian Peafowl unfurls its magnificently-colored tail and shakes it, it creates an ultra low frequency sound that we humans can’t hear. But it seems to get the special attention of female birds, called peahens.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.

The massive Kori Bustard struts across the savannahs of Eastern and Southern Africa. Its crested head sits on top of a long neck and stilted legs. And this winged giant has a colorful companion. A small bird called the Carmine Bee-eater perches on the bustard’s back. The Kori Bustard and the Carmine Bee-eater have a symbiotic relationship where at least one of them benefits. While the bustard searches for lizards, rodents, and other prey, it kicks up smaller insects that the bee-eater snatches up.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.