The arrival of African elephants at a Tucson zoo prompted a call for the zoo's fans to contribute leafy snacks. This file photo shows African elephants at the Pittsburgh Zoo & PPG Aquarium in 2011. Gene J. Puskar/AP hide caption

itoggle caption Gene J. Puskar/AP

A family of elephants in Kenya's Maasai Mara game reserve. Tony Karumba/AFP/Getty Images hide caption

itoggle caption Tony Karumba/AFP/Getty Images