Dead Monkeys Are Falling From Trees Amid Brutal Heat in Mexico

Gilberto Pozo, a biologist, was monitoring a small forest in the town of Cunduacán, in southern Mexico, in early May when two mantled howler monkeys fell from a tree in front of him with a thud.“They were dehydrated and received treatment,” he said. “But they didn’t survive.”At first, Dr. Pozo and his team at Cobius, a nonprofit conservation group, thought the monkeys had been overcome by smoke from fires set by…