Winner, "Animal Behavior: Mammals" Category


French photographer Cyril Ruoso pursued the screams of hunting chimpanzees through dense forests in Tanzania's Gombe National Park--and captured this winner of the 2008 Wildlife Photographer of the Year competition, announced October 30, 2008, in London.

The central and dominant figure, unwilling to share his half of a wild pig, is a 31-year-old male known as Frodo, lead hunter of his group.

"Frodo is a warrior," Ruoso said. "He catches the prey 80 percent of the time." (Learn more about Frodo.)

Such a large catch is rare for Gombe's chimpanzees, which usually target small monkeys, Ruoso said. (See more photos of Gombe chimps.)