Staffan Widstrand / Western crowned pigeon, (Goura cristata), Aiduma Island, Triton Bay, near mainland New Guinea, Western Papua, Indonesian New Guinea

Richard Robinson / Snares crested penguin (Eudyptes robustus) on rock washed with sea surf, Snares (Tine Heke) Sub Antarctic Island Group, Southern Ocean, New Zealand. December 2016. Editorial use only.

Tui De Roy / Marine iguana (Amblyrhynchus cristatus) two on beach, Santa Cruz Island, Galapagos.

Tui De Roy / Marine iguana (Amblyrhynchus cristatus) swimming underwater, Fernandina Island, Galapagos.

David Fleetham / Komodo dragons (Varanus komodoensis) on shore with saliva dripping from mouth, Rinca Island, Komodo National Park, Indonesia.

David Fleetham / Florida manatee (Trichechus manatus latirostris) mother and calf endangered. Three Sisters Spring in Crystal River, Florida, USA

Staffan Widstrand / Western crowned pigeon, (Goura cristata), Aiduma Island, Triton Bay, near mainland New Guinea, Western Papua, Indonesian New Guinea

Connor Stefanison / Cinnamon phase black bear (Ursus americanus) boar walking past an infrared triggered camera trap. Williams Lake, British Columbia, Canada July.

Lucas Bustamante / Marine Iguana (Amblyrhynchus cristatus) perched on a rock. Floreana Island, Galapagos Islands, Ecuador.

David Kjaer / Great Bustard (Otis tarda) males displaying, Salisbury Plain, Wiltshire, UK, April.

Jussi Murtosaari / Long-tailed duck (Clangula hyemalis), males in flight, Finland, April.

Danny Green / Black bears (Ursus americanus) standing on back legs, fighting, Minnesota, USA, June.