Red Howler Monkey, Madidi National <em/>Park, Bolivia
The red howler is a subspecies of howler monkey found only in Bolivia. I photographed this one from a canoe on Lake Chalalan in Madidi National Park in the Bolivian Amazon.
Nikon D700 with Nikkor 200-400mm lens (at 400mm) ISO 1600, f/4 at 1/320th of a second