Animals are altering their lives to adapt to climate change, but those changes may make them worse off, researchers warn.

Hanging out with other guppies can offer protection against predators, but all that social mingling can set them up for breeding deadly parasites.

A species of jumping spider in Kenya appears to use the blood-red abdomen of mosquitoes to target them as prey.

The ability of the gray fox to climb trees may offer a way for it coexist with coyotes, but preserving tree cover is key.

A group of orcas, also called killer whales, took down a blue whale near Australia. A whale biologist explains this extreme kind of predation.

Animals tend to top nature's list of protective parents, but wild radishes and other plants can also go to impressive lengths to protect their young.

Three species of weasel, including one considered the world's smallest carnivore, are likely in decline, researchers say.

When fawns sense danger from many sources, they relax rather than act hypervigilant. It's like they feel "there's no point in being ready to hide or flee."

The plumose anenome dines on a surprising menu item: ants. A new study digs into how they became part of a marine food chain.

Snails carrying the world's smallest computers have helped solve the mystery of a species that survived mass extinction, researchers report.