Alpha Male Orangutan, Tanjung Puting National Park, Indonesian Borneo
Male Bornean orangutans have faces that are more dish-shaped than the females. They also have huge cheek flaps that extend from the face, almost like horse blinders. This guy was the alpha male at Tanjung Puting when I visited there a few years back. He was the only orangutan that even the guides would steer well clear of. Lucky for me, I had the equivalent of 600mm of optics between myself and those lovely cheek flaps.
Nikon D300 with Nikkor 200-400mm lens (at 400mm) ISO 800, f/4 at 1/200th of a second