Rattlesnakes are important to habitat health, but there’s still much to learn about their behavior and ecological role.

Orphaned elephant calves from the Reteti Elephant Sanctuary are being translocated to their new home in Sera Wildlife Conservancy, in Kenya’s Samburu County this week.

A koala moved quickly out of a caretaker’s arms and up into a tall eucalyptus tree, while wildlife care specialists looked on. This koala is a member of an important group of the species that returned to their home in the Blue Mountains of Australia this past weekend.