Peter Esegon, 47, one of the primary rhino caretakers relaxes with Najin and Fatu as the sun sets at Ol Pejeta conservancy in Central Kenya. © Justin Mott, courtesy Anastasia Photo, New York.

An endangered baby Bornean orangutan, Pongo pygmaeus, named Aurora, with her adoptive mother, Cheyenne, a Bornean/Sumatran cross, Pongo pygmaeus x abelii, at the Houston Zoo. © Photo by Joel Sartore/National Geographic Photo Ark