Mark Carwardine / Sandhill cranes (Grus canadensis) flying, Bosque del Apache National Wildlife Refuge, New Mexico, USA

Wild Wonders of Europe / Widstrand / Wild Eurasian wolverine (Gulo gulo) walking along waters edge, Kuhmo, Finland, July 2008

Jorma Luhta / Aurora borealis colours in night sky over lake, northern Finland (nr Arctic circle), October 2002. Auroras also occur in the southern hemisphere where they are know as Aurora australis.

Mark Carwardine / Adult male Northern pintail duck (Anas acuta) on water, Bosque del Apache National Wildlife Refuge, New Mexico, USA

LYNN M. STONE / Yellow-Crowned Night Heron (Nyctanassa / Nyctanassa violacea) adult in non-breeding plumage foraging at low tide. Tarpon Springs, Florida, USA, November.

Igor Shpilenok / Red Fox (Vulpes vulpes) in snow by river with refelctions, Kronotsky Zapovednik, Kamchatka, Russia

TOM MANGELSEN / Teton Mountain Range reflected in lake, Grand Teton NP, Wyoming, USA