A four-day old Easter Black Rhinocerous calf sits with her mother in their enclosure at Chester Zoo in Chester, northern England. By 1992, poachers had killed off 96 percent of the rhino population. Today, only 21,000 exist, about 90 percent in South Africa. After darting it with a tranquilizer, poachers use a chainsaw to cut away the rhino's horns, leaving the drugged animal to bleed to death.
(Photo: Phil Noble/Reuters)