Scientists have detected microplastics in the digestive systems of red howler monkeys living in protected areas in the Brazilian Amazon, marking the first evidence of plastic ingestion by a ...

A new study revealed the presence of microplastics in the stomachs of howler monkeys living in a protected area of the Brazilian Amazon. This is the first evidence of plastic ingestion by a ...

Thirteen million years ago, a medium-sized monkey known for guarding its territory among the treetops with a fearsome "howl" started doing something new. This monkey, one of the oldest known ancestors ...

Far up a giant Amazon jungle tree, a large howler monkey walked among the branches. As it stepped from branch to branch, its long tail would wrap around a convenient trunk providing extra stability.

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Observations of Coiba’s tool-using immature capuchin monkeys show them carrying abducted infant howler monkeys. What is the reason for this behavior? Vanessa Crooks Caught in the act! Capuchin monkeys ...