Xiao Liwu, a 5 1/2-month-old male panda and his mother, Bai Yun, at the San Diego Zoo. —Photo by AP

Haui-San, front, a Clouded Leopard cub, plays with his leash as his brother Niki-San looks off behind, during a garden walk at the San Diego Zoo. —Photo by AP

A bear relaxing at Tam Dao Bear Rescue Center run by Animals Asia. —Photo by AFP

A Red Panda (Ailurus fulgens) eats after a medical examination at Schoenbrunn Zoo in Vienna. —Photo by Reuters

A kangaroo stands on ground blackened by a bushfire near Coonabarabran, Sydney. —Photo by Reuters

A six month old white lion cub yawns during the presentation of the new program in the ring of Circus Krone in Munich, Germany. —Photo by AP

Anfisa, a 8-year-old female chimpanzee, washes a window of her enclosure. —Photo by Reuters