A newly discovered species of spider in the Ecuadorean Amazon mimics a pathogen, known as a zombie fungus, to protect itself.

From tool-using chimpanzees to puzzle-solving capuchins, the primate world is packed with surprising brainpower. But how do the planet’s cleverest monkeys and apes really compare with human intelligen ...

Deep within the tropical rainforests of Central and South America lives one of the most powerful birds on Earth: the harpy ...

An extinct relative of the howler monkey may have been the first leaf-eating primate in South and Central America ...

Thirteen million years ago, a group of medium-sized monkeys known for guarding their territory among the treetops with fearsome "howls" started doing something new. These monkeys, among the oldest ...

Key Facts 13.3-million–13.6 million-year-old fossils from an extinct relative of the howler monkey show signs of being the first leaf-eating ...

The world’s largest spider is not just remarkable for its size but also for its powerful hunting adaptations. Known for its enormous leg span and heavy body, this giant tarantula relies on ambush ...

This was a real order of monkey business. A Connecticut zoo asked for help with naming its baby spider monkey -- and revealed the winning moniker on Facebook yesterday.

The Hattiesburg Zoo has welcomed four juvenile spider monkeys that were rescued from an attempted smuggling operation, according to a community announcement. Two males and two females have completed a ...