The American Tree Sparrow is a common winter visitor in the northern U.S. Despite their name, these sparrows stay close to the ground. When foraging, they’ll kick through leaf litter with their powerful feet, beat seedheads open with their wings or grab a bite from a backyard feeder. Sadly…

In this episode, Dr. Deja Perkins speaks with aeroecologist, Dr. Adriaan Dokter about the study of bird migration with weather radar. Using the vast supply of radars, primarily in the United States, Adriaan and his colleagues at the Cornell Lab of Ornithology research the failure and…

Oak trees are an important resource for birds finding insects to feed their young. It takes thousands of caterpillars from an oak tree to raise a single nest of baby birds. By planting an oak species native to your area, you can help ensure that birds are able to raise their young…

There are many great tools for identifying birds, some of them right on your phone. If you’re stumped on an unfamiliar plant species, iNaturalist is a great resource. When you upload a photo to iNaturalist’s website or mobile app, it uses AI to make an educated guess on the species ID. A…

You’ve probably heard the expression “light as a feather.” But bird feathers aren’t just amazingly light — they’re also resilient. Something that BirdNote and bird feathers share in common! Bird feathers are sturdy thanks to the cumulative strength of many tiny structures called barbules…

Rosalie Barrow Edge (1877-1962) was one of the 20th century’s most outspoken advocates for birds and a prominent figure in the modern American conservation movement. She famously preached that, "The time to protect a species is while it is still common." And while her conviction fell short…

One of the biggest threats to birds is the decline in biodiversity due to habitat loss — and the traditional, manicured lawn isn’t helping. Growing native plants in your yard allows you to protect birds at home, says ecologist Douglas Tallamy, who co-founded an organization called…

Los ácaros son diminutas criaturas emparentadas con las arañas y las garrapatas. Como por lo general no son más grandes que un grano de sal, muchas especies de ácaros dependen de animales más grandes para sobrevivir. En la región neotropical, los ácaros de las flores de los colibríes se…

Bananaquits are tiny songbirds with a sweet tooth. Their distinctive curved bills are perfect for sipping nectar from woodland flowers and urban hummingbird feeders. These songsters are widespread in Latin America from southern Mexico to northern Uruguay — and much of the Caribbean. Their…

The King Eider is one of the most striking sea ducks in the Northern hemisphere. This male King Eider is trying to woo a mate with soft coos and brilliant colors — his beak and feathers are decked out in black, white, green, grey, tangerine, yellow, and ivory. Unlike her showy suitor, the…