Cyril Ruoso / Red deer (Cervus elaphus) male calling during rut, Denmark. Non-ex

Ole Jorgen Liodden / Herd of Moose (Alces alces) following in line in each other's tracks, aerial view, Valdres, Norway, February.

Chris & Monique Fallows / Long-beaked common dolphin (Delphinus capensis) porpoising in still water, False Bay, South Africa

Staffan Widstrand / Bearded seal (Erignathus barbatus) hauled out on ice, Spitsbergen, Svalbard, Norway, September.

Sergey Gorshkov / Gemsbok (Oryx gazella) in sand dunes, Namibia. Finalist in the Mammals Category of the Wildlife Photographer of the Year Awards (WPOY) Competition 2015.

Krista Schlyer / Brown pelicans (Pelecanus occidentalis) covered in oil after BP oil spill, at rehabilitation centre waiting to be cleaned. Louisiana, USA. June 2010.

Espen Bergersen / Red fox (Vulpes vulpes) close up portrait, Lapland, Finland. March.

Edwin Giesbers / Red Squirrel (Sciurus vulgaris) in autumnal woodland leaflitter, the Netherlands, November.

Claudio Contreras / Caribbean flamingo (Phoenicopterus ruber) adult feeding chick, Ria Lagartos Biosphere Reserve, Yucatan Peninsula Mexico, June. Winner of the CONABIO Nature Photography Competition 2015.

Andy Rouse / Galapagos land iguana (Conolophus subcristatus) feeding, Urbina Bay, Isabela Island, Galapagos.

Krista Schlyer / Seven-spotted lady beetle (Coccinella septempunctata) inside the funnel leaf of Pitcher plant, Alabama, USA. May 2014.

Gabriel Rojo / Bay-winged cowbird,(Agelaioides badius) chicks begging for food, La Pampa, Argentina