Monkey hands
What is unusual about a spider monkey's thumbs?
The answer
They are reduced or absent
Spider monkeys have tiny or absent thumbs, which lets their long fingers form effective hooks for swinging through branches.
More monkey facts
Monkey tails
Which monkey uses a muscular prehensile tail while climbing through South American forests?
Read the answer →Clever monkeys
Capuchins have been seen using crushed leaves as what?
Read the answer →Noisy monkeys