Corcovado
ORG
Corcovado
Eduardo Carrillo was on a field trip to Corcovado National Park with a group of his biology students last November when he realized that something was wrong. In mid-November, park officials closed Corcovado to visitors after tourists, despite warnings not to handle wildlife, began bringing sick animals to ranger stations in the hope of saving them. But tissue samples from Corcovado spider monkeys Costa Rica's most endangered species of monkey sent to a laboratory at the University of Texas for analysis showed no evidence of a virus or other pathogen.