Photo of the year: Animals - Spider monkeys have long, thin arms with hooklike hands that allow them to swing through the trees. They do not have opposable thumbs. The brown-headed spider monkey has a prehensile tail

Stock photo: Photo of the year: Animals - Spider monkeys have long, thin arms with hooklike hands that allow them to swing through the trees. They do not have opposable thumbs. The brown-headed spider monkey has a prehensile tail was taken by simmons48 .