Add Yahoo as a preferred source to see more of our stories on Google. Three-toed sloth mating calls are often described as high-pitched screams or shrill whistles. These calls travel long distances ...

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 ...

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.