Elephants and buffalos gather around a shallow puddle at the Tsavo West National Park, near Voi, around 350 kilometres southeast of Nairobi, on February 16, 2017. The Kenya Wildlife Services (KWS) conduct a large mammal aerial observation over the 48,656 square-kilometre Tsavo-Mkomkazi ecosystem that straddles the Kenya-Tanzania border, to gather data on elephants and other mammals, about their numbers, movement and water/pasture resources. / AFP / TONY KARUMBA (Photo credit should read TONY KARUMBA/AFP/Getty Images)
