A new study found that butterflies are disappearing from the United States at an alarming rate.

Despite its large size though, these spiders don't have much of a bite.

At least four new species of deep-sea octopus have been discovered by scientists in a 100-square-mile-sized area off Costa Rica.

The first two leopard cubs born in captivity in Peru began climbing trees inside their cages at a Lima zoo in their first appearance before the public.

A giant, eight-legged arachnid will soon make an appearance in Oklahoma during the spookiest time of year.

An invasive species of hornet was discovered for the first time in the U.S.

One hundred million years ago, as iguanodons and triceratops fled from hungry tyrannosaurs, another biological drama played out on the ground...

Zoo Boise reports two rare Styan's Red Pandas will join the Boise Zoo.