The newly discovered Callicebus caquetensisis.
Scientists Thomas Defler, Marta Bueno and Javier García have discovered a new species of monkey in the Caquetá region of southern Colombia. The region, which is part of the Amazon rainforest, had been inaccessible for years due to a violent insurgence.
The violence subsided three years ago, allowing García–a native of Caquetá–to explore the Colombian Amazon. Using a GPS to traverse the upper Caquetá River, García found 13 different groups of titi monkeys, which have a very complex call.