Ernie Janes / Black howler (Alouatta caraya) male and female, captive, occurs in Brazil and Paraguay. With digitally added leaf pattern.

Ernie Janes / Black howler (Alouatta caraya) captive, occurs in South America.

Thomas Marent / Black Howler Monkey (Alouatta caraya) female, native to South America

Thomas Marent / Black Howler Monkey (Alouatta caraya) female, native to South America

Kevin Schafer / Guatemalan Black Howler Monkey (Alouatta pigra) calling, Community Baboon Sanctuary, Belize, Central America. Endangered species.

Kevin Schafer / Guatemalan Black Howler Monkey (Alouatta pigra) climbing, Community Baboon Sanctuary, Belize, Central America. Endangered species.

Juan Carlos Munoz / Black howler monkeys (Alouatta caraya) male and two females calling from tree, captive, Apenheul Park, Netherlands.

Cyril Ruoso / Black Howler Monkey (Alouatta caraya) female resting in tree, native to South America

Kevin Schafer / Guatemalan black howler monkey (Alouatta pigra) sitting in tree howling, Community Baboon Sanctuary, Belize. Endangered species.

Juan Carlos Munoz / Black howler monkey (Alouatta caraya) female howling, Pantanal NP, Mato Grosso, Brazil Not available for ringtone/wallpaper use.

Juan Carlos Munoz / Black howler monkey (Alouatta caraya) baby being carried by mother, Pantanal NP, Mato Grosso, Brazil

Edwin Giesbers / Young Black howler monkey (Alouatta caraya) looking down from tree, Costa Rica