White-breasted Nuthatches aren’t the toughest birds on the block — but when it comes to their nests, they know how to put up defenses. Squirrels could easily duck inside a nest cavity and gobble up the eggs. That’s why you might see nuthatches sweeping around their nest hole with a beetle or other insect. It’s thought that chemical compounds from the insect smell bad to squirrels, driving them away. And if that doesn’t work, nuthatches try to make themselves look as big as possible. More info an...
Sep 12, 2022•1 min
Puffins fly under water into schools of slender fish, filling their large beaks. Fish are wedged into the gape, the stretchy skin at the beak hinge, but the bill edges still line up neatly. The dangling fish won’t slide out because the puffin’s tongue and roof of the mouth are heavily lined with backward-angled spines. When its beak is full, the adult flies back to its nest and feeds it all to a single chick. More info and transcript at BirdNote.org . Want more BirdNote? Subscribe to our weekly ...
Sep 11, 2022•2 min
When Florida became a state in 1845, the legislature declared the Everglades, America's largest wetland, totally worthless. In 1905, Napoleon Bonaparte Broward was elected governor on a campaign to drain them. So over the years, the slowly flowing "River of Grass" has been replaced by a series of reservoirs with little water movement. The endangered Snail Kite feeds only on the Apple Snail. And neither kites nor snails flourish in places that are permanently under water. Learn more at StateOfThe...
Sep 10, 2022•2 min
Every spring in Northwest Ohio, the shores of Lake Erie transform into a birder’s paradise. Birder and author Kenn Kaufman, who lives in this area, says that of the many species that migrate through here, one group of vibrant, vivacious songbirds stands out from the rest: warblers. Trees leaf out later in the season along the lakeshore, making the tiny warblers easier to see as they forage for food. Northwest Ohio has earned a reputation as the Warbler Capital of the World among birders in the k...
Sep 09, 2022•2 min
In the animal world, large, charismatic species tend to get the most attention. But for the Kori Bustard, the largest flying bird in Africa, that attention hasn't translated to a ton of scientific research. Katherine Mertes, a research ecologist at the Smithsonian Conservation Biology Institute, tracks animals for a living, and a few years ago she was focused on Kori Bustards. Her team used solar-powered tracking devices to study the bustards’ movements. But first, they had to catch the birds — ...
Sep 08, 2022•2 min
Many bird species can eat the fruits of plants that are toxic to humans —even the white berries found on poison ivy. These birds just aren’t sensitive to the compounds in the berries that are irritating or poisonous to people. While you probably want to stay away from poison ivy, you can improve habitats for birds by planting native fruit bushes and advocating for wildlife-friendly gardening in public green spaces. More info and transcript at BirdNote.org . Want more BirdNote? Subscribe to our w...
Sep 07, 2022•2 min
Marcela Castellino works as a conservation specialist for Manomet’s Flyways team, visiting wetlands, salt lagoons, and salt flats around Mar Chiquita in Argentina, one of South America’s biggest salty wetlands. She surveys shorebirds to track their populations and strengthen their conservation. One species she studies, Wilson’s Phalarope, travels from their breeding grounds in North America to winter in huge numbers at Mar Chiquita. As they feed, they swim in circles, swirling the water and stir...
Sep 06, 2022•2 min
Wood Thrushes migrate more than 2,000 miles each way, between their summer breeding territories in the US and Canada to where they winter in Central America. During migration, the birds will fly for hundreds of miles at night, then stop for days or weeks to refuel. In the spring, they’ll head north three times as fast as they did during their southbound fall migration. More info and transcript at BirdNote.org . Want more BirdNote? Subscribe to our weekly newsletter. Sign up for BirdNote+ to get ...
Sep 05, 2022•2 min
Picture this Gadwall duckling swimming slowly across a pond, skimming the water’s surface with its broad, spatulate bill. This behavior is called dabbling. Along with the pond water, multitudes of tiny particles pass through the duck’s bill. Somehow it sorts out and swallows the edible seeds and invertebrates, while rejecting the tiny, inedible bits of grit, mud, and debris. To see how a duck pulls this off, we need to pry its bill open and look carefully inside. More info and transcript at Bird...
Sep 04, 2022•2 min
A tern or gull plunges headfirst into the water, then bounces aloft grasping a small fish in its bill. But before the bird can swallow its catch, a Parasitic Jaeger swoops in. The jaeger nips the bird's wing, and it drops its hard-won fish. The pirate catches the fish in mid-air and gulps it down. The jaeger (German for hunter) is built for sprinting speed and predatory feats. More info and transcript at BirdNote.org . Want more BirdNote? Subscribe to our weekly newsletter. Sign up for BirdNote+...
Sep 03, 2022•2 min
When young Bald Eagles fledge, the event is the culmination of nearly a year’s work by the parents. Let’s recap how it might have gone: male and female build a nest over the winter. By March, they have two eggs. The female incubates the eggs for about a month, with the male taking an occasional turn. The result? A couple of tiny, three-ounce chicks. At eight weeks, they’re as heavy as the adults — 10 to 14 pounds. Two weeks later, they make their first flights. But it will take another 10 weeks ...
Sep 02, 2022•2 min
Willistown Conservation Trust in Pennsylvania carries out bird banding to help researchers understand bird populations. Led by licensed bird banders, a team of volunteers catches birds using mist nets — 8-foot tall nets made of fine nylon string that practically disappear when strung out between poles. After carefully untangling birds from the net, volunteers weigh and measure the birds, affixing a small metal band to their legs with a unique ID. Compiling records for many banded birds helps kee...
Sep 01, 2022•2 min
For many species of birds, scientists know more about the males than the females. And that’s a problem when making a conservation plan for a species that maps out which habitats to protect. Joanna Wu, a PhD student at UCLA, says that in some species of warblers, males and females live in completely different habitats during the winter. Joanna hopes to study how to better incorporate female birds into conservation efforts and ensure that the whole species is protected. More info and transcript at...
Aug 31, 2022•2 min
By late summer, the male Mallard’s need for fancy feathers to attract the females has passed. These birds have molted, and their bright feathers are replaced with mottled brown ones. Subdued colors help camouflage the male ducks, protecting them from predators. Come fall, the male Mallards will molt again and become the colorful dandies we remember. More info and transcript at BirdNote.org . Want more BirdNote? Subscribe to our weekly newsletter. Sign up for BirdNote+ to get ad-free listening an...
Aug 30, 2022•2 min
When you think of bird migrations, you might think of a bluebird or a robin first. But some owls do migrate – such as the Short-eared Owl, which flies south for the winter. Northern Saw-whet Owls were once thought non-migratory, but in fact they travel at night, unseen. Snowy Owls breed in the Arctic then wander toward the south, staying wherever they can find food. Some Burrowing Owls spend their whole life in one place. But others migrate every spring and fall with the regularity of a bluebird...
Aug 29, 2022•2 min
When courting in spring, male and female Cedar Waxwings communicate with distinctly different calls and, perched side by side, often pass back and forth between them a berry or other small fruit or even a flower petal. Waxwings display a wealth of eye-catching plumage. If you relish the company of Cedar Waxwings, plant fruit-bearing trees and shrubs. Find native plants for your garden at Audubon's Native Plant Database . More info and transcript at BirdNote.org . Want more BirdNote? Subscribe to...
Aug 28, 2022•2 min
Some birds stash unopened seeds for use later. But how do they know which seeds are worth the trouble, before expending the energy to open them? A team of scientists from South Korea and Poland may have an answer. As part of a series of experiments, the scientists observed the behavior of Mexican Jays presented with peanuts in their shells. The research team documented the birds shaking nuts in their beaks to assess the weight and possibly listening for the nuts rattling. In other words, jays us...
Aug 27, 2022•2 min
Long, upward slopes called escarpments offer a good chance of seeing some of the many raptor species found in Belize. Shaped like a compact Red-tailed Hawk, White Hawks are white overall with black markings and scan the landscape for reptile prey. Bat Falcons have a darkly barred chest and cinnamon belly, and chase down swifts, dragonflies, and the bats that give them their name. Ornate Hawk-Eagles stand over two feet tall and are capable of catching monkeys. More info and transcript at BirdNote...
Aug 26, 2022•2 min
By August, many birds have just completed the intense rigors of nesting and raising young and now undergo a complete molt. Molt is a cyclic process of feather growth. As new feathers grow in, they push the old ones out. Why molt? Because feathers wear out. Songbirds that migrate long distances need to complete this process on a tight schedule, to be ready when it's time to strike out in September. You might not even recognize this American Goldfinch in its winter plumage. More info and transcrip...
Aug 25, 2022•2 min
In this episode of BirdNoir, the P.I. gets a call from Mrs. Pico, a friendly woman who always has homemade cookies ready for visitors. But someone’s playing a trick on her: knocking on the door and then disappearing! The P.I. suspects the culprit is a bird and helps Mrs. Pico narrow down the list of suspects. 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. Y...
Aug 24, 2022•2 min
The ‘Ua’u or Hawaiian Petrel is an endangered species once thought extinct or nearly so. But in recent decades, biologists have relocated some of their well-hidden nests — such as underneath the lava fields of Mauna Loa, an active volcano. Areas where the lava has long since cooled have deep tubes in which the ‘Ua’u can make their burrows. Despite their secretive burrows, the ‘Ua’u are still at risk of predators such as feral cats. A fence completed in 2016 keeps predators away from the petrel b...
Aug 23, 2022•2 min
Biologist Erick Greene has been taking blood samples from Osprey chicks in northwest Montana for years. Ospreys eat fish, so toxins in the water become concentrated in their bodies. Their blood offers a window into how pollution moves through the food chain. Finding high mercury levels in Osprey chicks helped Greene trace the toxin’s source. Hear more about how Montana’s Ospreys are persisting despite pollution on the Threatened podcast....
Aug 23, 2022•2 min
Many birds migrate at night, taking advantage of less turbulent conditions and cooler temperatures. But that also means that migrating birds can get disoriented by bright lights and collide with a building. Julia Wang is the project leader for BirdCast, which provides forecasts for bird migration so that people know when they should keep their lights off. Turning off the lights during peak migration times can save birds and save energy at the same time. More info and transcript at BirdNote.org ....
Aug 22, 2022•2 min
Crested Auklets are small seabirds that nest on remote cliffs in the Northern Pacific and the Bering Sea. But it’s their smell that really sets these birds apart. They smell like tangerines! Experiments show that females go for males that emit the strongest scents. 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 pos...
Aug 21, 2022•2 min
A bird like the Whip-poor-will is a true night bird – feeding, and mating, and nesting in the dark. But for about a week each spring, male Yellow-breasted Chats also sing in the darkness as they call out to the arriving females — their potential mates. There are other night singers, too! 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 gif...
Aug 20, 2022•2 min
Public radio station WYSO in Yellow Springs, Ohio, renovated a historic schoolhouse to move into. But there was a bird problem: the old chimney had to come down, and Chimney Swifts were known to nest in it. So the station decided to custom-build the swifts a new home: a Chimney Swift tower right on the front lawn. The builders worked quickly to finish the tower ahead of the Chimney Swift’s spring migration, and WYSO staff members played recordings of swift calls to help attract them to the new h...
Aug 19, 2022•2 min
The ‘Alalā is a crow species that only lives on Hawai’i. In the 1990s, the species was on the verge of extinction. So biologists decided to raise ‘Alalā in captivity, aiming to release them once the captive population was big enough. But these intelligent birds have to learn many skills to survive in the wild, such as communication skills and avoiding predators. Several ‘Alalā were released and seemed to get the hang of avoiding hawks. These experienced birds returned to captivity and could help...
Aug 18, 2022•2 min
On a hot summer’s day, watch a bird such as a crow — or this Purple Martin — very carefully. You’ll never see them sweat, because birds don’t have sweat glands. So how do they keep cool? One way is panting. As the bird breathes rapidly, heat is carried out of its body through the lungs and air sacs. Bare skin on the legs, face, and beak also help with cooling. So do puffing out feathers, fluttering wings, or splashing in a puddle or birdbath. And soaring birds like hawks can simply ride the updr...
Aug 17, 2022•2 min
Avian malaria has devastated native Hawaiian birds called honeycreepers. And now, climate change is allowing the mosquitoes that carry the disease to spread into the last mountain refuges of highly endangered honeycreepers on the island of Kauai. However, there’s hope that a new tool could eradicate the disease. Researchers are raising mosquitoes in the lab infected with Wolbachia, a bacterium that makes them infertile. When these males mate with wild female mosquitos, they fail to reproduce. Wh...
Aug 16, 2022•2 min
In the late 19th and early 20th centuries, the human fascination with bird feathers went a little too far. Women’s hats and dresses featured extravagant feathers from birds both near and far. The trade in feathers drove several species, from the Little Egret to the Great Crested Grebe, to near-extinction. Fed up with the killing of wild birds for fashion, a group of British women met to put an end to this cruelty. The organization became the Royal Society for the Protection of Birds, or RSPB, wh...
Aug 15, 2022•2 min
