Laurent Geslin / European edible frog (Rana esculenta) in urban park, next to pond with buildings in distance, Grenoble, France, May.

Edwin Giesbers / European bison (Bison bonasus) with town in the background, Zuid-Kennemerland National Park, the Netherlands. January. Reintroduced species.

Matthew Maran / Lime trees (Tilia sp) and benches in snow, Kenwood Estate, London, UK, January 2013.

Matthew Maran / Sunset over snow-covered Hampstead Heath in winter, London, UK, January 2013.

Matthew Maran / Oak tree (Quercus robur) in snow, Hampstead Heath, London, UK, January 2013.

Matthew Maran / Mute swans (Cygnus olor) Highgate Ponds, Hampstead Heath, London, UK, February.

Matthew Maran / Great created grebe (Podiceps cristatus) with chick following, and person swimming in pond, Hampstead Heath, London, July 2014.

Bruno D'Amicis / Apennine chamois (Rupicapra pyrenaica ornata) herd resting on altitude plateau of Majella Massif, in moonlight with distant urban lights in the background. Endemic to the Apennine mountains. Majella N...

Juan Carlos Munoz / Iberian black pig in oak woodland, Sierra de Aracena Natural Park, Huelva, Andalucia, Spain, Europe. Breed used to produce Iberico ham / Jamon Iberico

Juan Carlos Munoz / Iberian black pig foraging in oak woodland, Sierra de Aracena Natural Park, Huelva, Andalucia, Spain, Europe. Breed used to produce Iberico ham / Jamon Iberico

Laurent Geslin / Two urban Grey Herons (Ardea cincerea) fighting, Regent's Park, London, England UK

Laurent Geslin / Urban Red fox watches people on park bench {Vulpes vulpes} London, UK