Biologists Jim Cordoba-Alfaro, left, and Jenna Lawson listen for the sounds of endangered Geoffrey's spider monkeys at the private Rio Nuevo Nature Reserve on the Osa Peninsula in Costa Rica, on March 20, 2023. — AP Photo/Matt O'Brien
PUERTO JIMENEZ: The endangered Geoffrey’s spider monkeys that dangle high in the rainforest canopy are elusive and hard for scientists to track.
So biologist Jenna Lawson hid 350 audio monitors in trees across Costa Rica's lush Osa Peninsula to spy on them.
