Sloths are some pretty interesting animals. Beyond their reputation for being slow, a host of different traits reveals a lot about their evolution and behaviors. Take for example their mating calls.

Some animals, from puffins and swans to prairie voles, are known to mate for life. For female mosquitoes, mating typically occurs once in their lifetime—lasting under 30 seconds—before the couple go ...

A gene associated with courtship behavior in fruit flies does not operate the same way in two different fruit fly species, a new study finds. The work demonstrates that conserved genes—the same genes ...

Three-toed sloth mating calls are often described as high-pitched screams or shrill whistles. These calls travel long distances through dense rainforest canopy, alerting any solitary males. Two-toed ...

A female mosquito only gets one shot to get reproduction right: She mates just a single time in her entire life. With the stakes so high, it would make sense for these insects to be quite choosey when ...