Unlike Old World monkeys, howlers and other New World species have wide, side-opening nostrils and no pads on their rumps. Howlers also boast a prehensile tail. They can use this tail as an extra ...

New World monkeys have a prehensile tail, meaning they can grasp and hold things with it. They can hang upside down by their tails if they want! This makes tree life a good fit. If you are looking ...

New World and Old World monkeys. A few significant variations between these two groups are their opposable thumbs, sitting ...