Every BirdNote episode starts with a solid grounding in research. When we play a bird sound for you, first we make sure you're hearing the right species. But not just that — we bear in mind the distinction between songs and calls, and we make sure the recording comes from an appropriate…

Green-winged Teal are North America's smallest dabbling duck, at just over a foot long and weighing less than a pound. The male has a cinnamon brown head with a band of green behind the eye. Both males and females have a green bar on the wing that gleams like an emerald when the sun…

The White-tailed Hawk thrives in the grassy plains of the Texas Coastal Plain, where many tropical species reach the northern limit of their ranges. White-tailed Hawks often hunt by kiting: hovering like a kite in the breeze with the wings held in a “V” above the body, dropping suddenly on…

In this episode featuring Aviary — the shapeshifting bird superhero — the surprising abilities of birds come in handy when a student gets lost exploring a cave with his class. Aviary remembers an amazing bird called the Himalayan Swiftlet that’s able to echolocate like a bat, and enlists…

Bats and birds have evolved very different ways of flying. Birds have stiff feathers projecting from lightweight, fused arm and hand bones; bats have flexible wings of membranes stretched between elongated fingers. While birds use the strong downstroke of their wings to fly, bats support…

As thousands of army ants march through a rainforest in Panama looking for food, countless insects try to escape. Antbirds follow the ants, waiting for flying insects to leave their hiding spots so they can swoop down and catch them. About 300 species of animals, including 29 bird species…

In this episode, we meet Aviary: the superhero alter-ego of a mild-mannered birder bitten by a radioactive feather mite. Aviary became able to shapeshift into any of the birds they've seen in their travels — taking on the ultra-fast flight of a falcon or the super-swimming skills of a…

In the 1990s, train engineers in Japan built trains able to travel nearly 170 miles per hour. The problem was that when the trains exited a tunnel, the air in front of their bullet-shaped noses expanded rapidly, creating a loud “tunnel boom.” The chief engineer, a birder, looked to the…

When the shorebirds called Lesser Yellowlegs sense a threat to their nest, they’ll put up an unforgettable racket to drive the danger away. Smaller and with a shorter bill than the Greater Yellowlegs, Lesser Yellowlegs sing to attract mates, while flying or perching up in a tree like a…

In several neighborhoods of Sydney, Sulphur-crested Cockatoos have learned ways to open trash bins and grab some leftover food. Researchers found that birds in a given suburb seem to learn their trash bin opening technique from nearby birds, leading to subtle differences in how cockatoos…