Peak bird migration is about to start in Colorado and around the country. Here are tools for tracking and identifying the ...

The massive annual spring migration of America's birds – millions of them – is underway. Here's how to follow along at home.

From the mountain-dwelling Goulds in the Sky Islands of New Mexico and Arizona to the notoriously cagey Osceola of the ...

These impressive growths are a symbol of status and a weapon used in epic battles across the Rocky Mountains. Fighting for dominance or mating rights, males face each other, rear up on their hind ...

Each spring, hundreds of thousands of swans, geese, cranes and other waterfowl descend on a Montana lake on their way to the Arctic. A small town festival draws thousands of bird fans.

BILLINGS — A Bozeman hunter’s bird dog has alerted health officials to the possibility that the tick that carries Lyme ...

It's the Rocky Mountain population of the Greater Sandhill Crane, and the flock is around 25,000 birds. Other places across North America see cranes too. In Indiana, at least 1,500 of the eastern ...

Rocky Mountain National Park has provided habitat for more than 60 species of mammals, including the first wolf and a growing population of moose; more than 280 species of birds; 11 species of ...

Altitudinal migrants: These are birds that change altitude, not location, generally up or down a mountain. Think of the Rocky Mountains and birds such as Clark's nutcracker, the mountain chickadee ...

Some 1 million birds were in Colorado on Tuesday. Colorado and other Rocky Mountain states have altitudinal migrants, such as the Clark's nutcracker, the mountain chickadee and rosy finches.