FILE PHOTO: A newly born Mexican gray wolf cub, an endangered native species, interacts with his mother at its enclosure at the Museo del Desierto in Saltillo, Mexico, July 19, 2016. REUTERS/Daniel Becerril/File Photo
FILE PHOTO: A newly born Mexican gray wolf cub, an endangered native species, interacts with his mother at its enclosure at the Museo del Desierto in Saltillo, Mexico, July 19, 2016. REUTERS/Daniel Becerril/File Photo