Claudio Contreras / Grey fox (Urocyon cinereoargenteus) licking nose, captive, Mexico City

Erlend Haarberg / Arctic fox (Alopex lagopus) cubs playing, Dovrefjell-Sunndalsfjella National Park, Norway, July.

Andy Trowbridge / Arctic Fox (Alopex / Vulpes lagopus) portrait in early morning light, during moult from grey summer fur to winter white. Dovrefjell National Park, Norway, September.

Juergen Freund / Spectacled flying fox (Pteropus conspicillatus) casualty of paralytic tick (Ixodes holocyclus) bite being cared for on site of colony by Jenny Mclean, North Queensland, Australia, November 2012

Karine Aigner / Grey fox (Urocyon cinereoargenteus) in undergrowth. Texas, USA. June.

Karine Aigner / Grey fox (Urocyon cinereoargenteus) looking upwards, portrait. Texas, USA. June.

Oscar Dewhurst / Red fox (Vulpes vulpes) with recently-caught Grey squirrel (Sciurus carolinensis) prey, London, UK. November

Jaymi Heimbuch / Santa Catalina Island Fox (Urocyon littoralis catalinae) biologists, Julie King and Rebekah Rudy, examining fox during vaccination and health check up, Santa Catalina Island, Channel Islands, Californ...

Jaymi Heimbuch / Santa Catalina Island Fox (Urocyon littoralis catalinae) biologist, Julie King, vaccinating fox against canine distemper virus, Santa Catalina Island, Channel Islands, California

Jaymi Heimbuch / Santa Catalina Island Fox (Urocyon littoralis catalinae) biologist, Julie King, doing blood work, Santa Catalina Island, Channel Islands, California

Jaymi Heimbuch / Santa Catalina Island Fox (Urocyon littoralis catalinae) biologists, Julie King and Rebekah Rudy, examining fox during vaccination and health check up, Santa Catalina Island, Channel Islands, Californ...

Jaymi Heimbuch / Santa Catalina Island Fox (Urocyon littoralis catalinae) biologist, Julie King, near live trapped fox during vaccination and health check up, Santa Catalina Island, Channel Islands, California