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A trail-cam photo shows a lioness in a region where adult female lions have been scarce, leading conservationists to fear for the population.

What’s 5 feet long and secretes a nasty-smelling mucus when it’s mad? A weird, “giant” animal only found in one place in the world.

Footage shows a mountain lion investigating some hikers; it stalks them for a while, getting as close as 10 feet away. They have no idea.

A dad and toddler were eating a meal when they spotted an orca putting on a wild, leaping show outside their window. Watch here.

A bobcat kitten named Mr. Murderbritches was not interested in cooperating with humans, even during his release back into the wild.

A group of snorkelers were surrounded by some Pacific white-sided dolphins, but then, their guide spotted something else . . . something big.

A woman sitting on her front porch realized she was not alone; there was a mountain lion staring at her from across the yard. Watch here.

USFWS shared footage of a grunting bison, saying rut season is a time of “headbutting, tail flagging, wallowing, and grumpiness.” Listen here.

Scientists are sharing what may be the first video footage of a rare monkey that lives in the forests of the Democratic Republic of Congo.