It’s so hot in Mexico that howler monkeys are falling dead from the trees. At least 83 of the midsize primates, who are known for their roaring vocal calls, were found dead in the Gulf coast state of ...

The deaths of dozens of howler monkeys may be the latest sign of the danger extreme temperatures pose to wildlife around the world. By Manuela Andreoni Gilberto Pozo, a biologist, was monitoring a ...

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 ...