Red Howler Monkey, Madidi National Park, BoliviaI spotted this female red howler monkey in a clearing in the forest in Madidi National Park in the Bolivian Amazon. Howler monkeys are renown for their loud calls, which can be heard up to three miles away.
Nikon D700 with Nikkor 200-400mm lens (at 400mm) ISO 1600, f/4 at 1/50th of a second