Spider monkeys have long, thin arms with hooklike hands that allow them to swing through the trees. They do not have opposable thumbs(对生拇指). The brown-headed spider monkey has a prehensile(缠绕性的)tail, which means it can grasp and can be used like a fifth leg to grab trees. Duri...
“We need another and a wiser and perhaps a more mystical concept of animals. Remote from universal nature and living by complicated artifice, man in civilization surveys the creature through the glass of his knowledge and sees thereby a feather magnified and the whole image in distortio...