A group of male capuchin monkeys kidnapped baby howler monkeys – a different species – on a small island of Panama. Video shows the howler monkeys clinging to the male capuchin monkeys’ backs, but the ...

Spider monkeys live in fluid social groups that split and reform, allowing information about food sources to spread across the population. By moving between subgroups, individual monkeys help create a ...

Monkeys reject unfair food rewards, demonstrating a sense of fairness. Research shows capuchins and chimpanzees refuse unequal treats. Bonobos and marmosets display different reactions based on social ...