Gray woolly monkey

Gray woolly monkeys live at altitude in the fog forests of the Amazon, primarily in Peru and Brazil. About 18 to 23 inches long, they have a long thick tail and a potbelly. In fact, their name in Brazil is macaco barrigudo, which means “big-bellied monkey.”

They’re classified as threatened. The New England Primate Conservancy reports that over the last half-century, 50 percent of the population has been lost, largely due to the clearcutting of forests for mining and agriculture.

Babies are also kidnapped for the illegal pet trade and their mothers killed in the process.