A zoo keeper arrives with a Christmas treat for the elephants as discarded festive trees are offered to them for their morning snack at the zoo in Berlin on January 8, 2015. AFP PHOTO / ODD ANDERSEN (Photo credit should read ODD ANDERSEN/AFP/Getty Images)

A zoo keeper arrives with a Christmas treat for the elephants as discarded festive trees are offered to them for their morning snack at the zoo in Berlin on January 8, 2015. AFP PHOTO / ODD ANDERSEN        (Photo credit should read ODD ANDERSEN/AFP/Getty Images)