Wim van den Heever / Julia heleconia (Dryas julia) butterfly on head of Yacare caiman (Caiman yacare) Pantanal, Brazil.

Anup Shah / African elephants (Loxodonta africana) gathering at a waterhole, wide angle view. Maasai Mara National Reserve, Kenya.

Tui De Roy / Emperor penguin (Aptenodytes forsteri) chicks, Amanda Bay, Prydz Bay, Ingrid Christensen Coast, East Antarctica, November.

Chris & Monique Fallows / Common dolphin (Dephinus delphis) pod feeding on sardines (Sardinops oecllata) East London, South Africa.

Markus Varesvuo,Markus Varesvuo / Guillemot (Uria aalge) landing, Vardo, Norway, March.

Ernie Janes,Ernie Janes / Newly hatched ducklings with eggs.

Theo Bosboom,Theo Bosboom / Gulls, predominantly Iceland gulls (Larus glaucoides) flying above stormy ocean near Vik, Iceland, March 2012.

Jabruson,Jabruson / African Forest Elephant (Loxodonta africana cyclotis) mother playing with her calf. Dzanga Bai, Dzanga-Ndoki National Park, Central African Republic.

David Tipling / House Martin (Delichon urbicum) leaving nest under eaves of house, Northumberland, UK, July

David Tipling / Blue and Yellow Macaws (Ara ararauna) in flight, Tambopata Amazon, Peru

Mark Bowler,Mark Bowler / Red eyed tree frog (Agalychnis callidryas) walking, digital composite Captive

John Cancalosi / Snow man and woman, built after winter storm, Washington DC area, USA 2016