Scientists think these outsize organs create an echo chamber that amplifies the monkey’s ... a coat of light brown fur that turns red around the head and shoulders and gray at the arms, legs ...

The gray woolly monkey has a coarse, short, gray coat, for example, while the Peruvian yellow-tailed woolly monkey has longer, softer fur the color of dark chocolate with a distinctive yellow ...

The newly identified species of monkey, Popa langur in Myanmar’s central ... These monkeys are small and covered in soft fluffy gray fur with silvery grey-white chests and bellies.