In Canada, where Alberta meets The Northwest Territories, lies Wood Buffalo National Park, where endangered Whooping Cranes dance, nest, and raise their young. It's a "place of superlatives,” says park superintendent Rob Kent. “Visitors can see pristine ecosystems, 5,000 bison, 150-pound…

Most of the time, a Ruby-crowned Kinglet is neither ruby nor regal. A tiny songbird washed in faded olive-green, the male shows a hint of crimson atop of his head — hardly a ruby crown. But don’t forsake the kinglet for flashier birds. When courting a female or dueling with another male…

The Arctic is still wintry when male Snow Buntings return to nesting areas in April. There's a big benefit to arriving early enough to claim a prime nest cavity in a rock face or under boulders, where it will be safer from predators. Nesting in chilly rock cavities means extra care must be…

A raucous call and a bold flash of blue at your feeder means a jay has arrived. East of the Rockies, your visitor is quite likely a Blue Jay (left). Out west, you're probably seeing a Steller's Jay. These daring blue dandies sound the alarm, announcing the approach of a predator. Often the…

Bald Eagles build large stick nests in tall trees. These nests endure rough treatment. Rambunctious chicks pull sticks out and flap madly, holding on with their feet, before they fledge. Wind buffets the nest year round. But eagles reuse their nests year after year. Adult eagles break off…

A modest thicket of trees along a street can be the perfect place to hear one of the earliest bird songs of spring: the Fox Sparrow. You can hear their loud, spirited songs from dense vegetation throughout much of the U.S. The easternmost birds have the rufous color of a Red Fox. Others…

A captive breeding program has helped set California Condors on the path to recovery. But when biologists reviewed the family tree for the breeding program, they found a big surprise. Two chicks had DNA that linked them perfectly to their mothers but didn’t match a single male. They arose…

On this episode of BirdNoir, the Mayor of Bricksville calls the Private Eye with a bit of a problem: “several dozen giant bird-punks loitering on top of City Hall!” The detective figures out the most likely reason why these birds have chosen the top of a building as their hangout, and…

Thousands of years ago, rising sea levels isolated much of the Florida peninsula as an island. During that long isolation, a unique oak-scrub ecosystem developed. The Florida Scrub-Jay is one of many special animals and plants that evolved with this habitat. Because they depend on acorns…

Tree Swallows and bluebirds — like this Western Bluebird — are among the earliest northbound migrants to arrive, heralding spring a month before the equinox. These species will nest only in cavities, such as old woodpecker holes or man-made nestboxes. But the supply of specialized nest…