Red Howler Monkeys, PeruOf the four species of monkey I photographed on this recent trip to Peru, the red howlers were the only species that I’ve photographed in the past. I saw them in both Bolivia and Brazil. This is a mated pair, the male in the front. Nikon D500 with Nikkor 500mm PF lens, ISO 1600, f/5.6 at 1/1600th of a second, Godox V860iii fill flash.