A Colorado brown tarantula (Aphonopelma hentzi) on the move at twilight. Each autumn, Colorado’s brown tarantulas emerge from their burrows and wander across the plains in search of mates. Males, ...

Just before sunset, as baseball-sized tarantulas cross the road at Colorado’s Southern Plains Land Trust, two biologists quietly exit their car to scoop up a few of these eight-legged pedestrians.

These hairy spiders spend almost all of their lives underground. But when it's time to mate, they must brave the great outdoors before they perish. Male tarantulas are moving and wooing their way ...

The furry eight-legged spiders known as tarantulas spend autumn months looking for a mate, but they might come across humans, instead. Although they are more common in California, Colorado, Kansas, ...