Like the woolly mammoth, a giant, prehistoric deer survived the last ice age, a new study shows. So what caused the Irish elk's eventual extinction?

Wild chimpanzees have been filmed using tools in combination to extract termites from mounds—further evidence that tool use is not unique to humans.

Bees, via pollination, are responsible for 15 to 30 percent of the U.S. food supply. But in the last 50 years the domesticated honeybee population has halved, scientists say.

In the animated movie Shark Tale, a tiny cleaner fish dreams of climbing the social ladder on a reef terrorized by sharks. The story may not be that far-fetched.

While leaves tumble from trees this fall, another natural wonder is soaring overhead. Hawks in North and South America are taking to the air as part of a seasonal migration.

As they have for millennia, wolves reign supreme in the temperate rain forest that drapes the inland fjords and islands of northwest British Columbia.

Photographer and conservationist Karl Ammann discusses why he takes often shocking photos of African apes and other rare animals killed for meat. With photo galleries.

Photographer and conservationist Karl Ammann discusses why he takes often shocking photos of African apes and other rare animals killed for meat. With photo galleries.

The North American bullfrog population is booming. That may sound like good news, but it isn't—not when the frog has leaped far beyond its native habitat.

The male meadow vole faces a big problem: How can it become a father when a female is likely to mate with every other male in the neighborhood?

Oil spills cause over half a million waterbird deaths each year, according to conservationists. Rescue workers offer some birds a chance at survival.

New Zealand has reached a major milestone in its 110-year effort to save many native birds from extinction and reintroduce them to their old mainland habitats.

For the past 30 years scientists have scoured the most inhospitable environments for life. Just about everywhere they look, they find it thriving in microscopic form.

A new study suggests the ancient Egyptians put as much care into mummifying some cats, birds, and other animals as they did into preserving human corpses.

Surfers and sunbathers aren't the only creatures crowding the Malibu beach, as birding columnist Mathew Tekulsky discovered during a recent stay.