Learn what Clark's nutcracker looks like and sounds like. Plus, learn how the birds' food-caching ways help forests and when ...

A UC Davis professor's pleasure hike in the High Sierra turned into a new elevation record for California's highest tree, the ...

Scientist finds Jeffrey pine trees at record mountain heights, suggesting climate-driven shifts in Sierra Nevada.

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.

More than 100,000 birds were in Utah on March 18. Utah and other Rocky Mountain states have altitudinal migrants, such as the Clark's nutcracker, the mountain chickadee and rosy finches.

Some animals never forget—and not just in that folksy, "elephants remember everything" way. Across land, sea, and sky, particular creatures are absolute memory machines, storing details that would put ...

Think of the Rocky Mountains and birds such as Clark's nutcracker, the mountain chickadee and rosy finches. Whether higher elevation birds move depends on local conditions. Short-distance ...

This year, we enjoyed the welcome and constant companionship of a family of gray jays. A bold and curious bird, the gray jay is well known in forest encampments as a thief, stealing food and other ...