Description: Native to eastern Bolivia and Paraguay, the White-eared Titi Monkey is locally known as the Huicoco de Bolivia. Photo from Santa Barbara Zoo, California. In context at www.dixpix.ca/Amazon/fauna/primates/index.html. Date: 27 March 2012, 05:54. Source: Callicebus donacophilus. Author: Dick Culbert from Gibsons, B.C., Canada.