The Mantled Howler (Alouatta palliata) or Golden-Mantled Howling Monkey is a medium-sized primate occurring in parts of Central and Southern America (Mexico, Guatemala, Honduras, Nicaragua, Costa Rica, Panama, Colombia, Ecuador, Peru). The animals live in groups of up to 40 members and inhabit mostly rainforests. Their diet is dominated by leaves, but also includes fruits and flowers. Mantled Howlers are diurnal and spend most of their time climbing in the forest canopy. Their name derives from the very loud calls made by the males which can be heard for several kilometers. I have photographed these interesting primates in the jungle near the Fort San Lorenzo and on Barro Colorado Island in Panama (February and March 2014).