Ann & Steve Toon / White rhino (Ceratotherium simum) at waterhole at night, Zimanga Private Game Reserve, KwaZulu-Natal, South Africa.

Tui De Roy / Gough Island bunting (Rowettia goughensis) gathering nesting material. Gough Island, Gough and Inaccessible Islands UNESCO World Heritage Site, South Atlantic. Endemic. Critically endangered species.

Jen Guyton / East African black mud turtle (Pelusios subniger) in seasonal pond. Gorongosa National Park, Mozambique. Cropped image

Dave Watts / Colombian spider monkey (Ateles fusciceps rufiventris) group. Captive, Critically endangered species.