Ammonite / Female Topi (Damaliscus lunatus) and calf scratching and suckling, with another calf grooming itself nearby and a third lying down in the grass, Masai Mara, Kenya.

Jabruson Motion / Group of African forest elephants (Loxodonta africana cyclotis) feeding, drinking and interacting at a mineral pool, Dzanga-Ndoki National Park, Sangha-Mbaere Prefecture, Central African Republic

Roger Powell / Reindeer (Rangifer tardus) rubbing its velvet antlers on vegetation. Porsanger interior, Finmark, Norway, June.

Dave Watts / Common Wombat (Vombatus ursinus) adult scratching, Tasmania.

Christophe Courteau / Walrus (Odobenus rosmanus) scratching, Poolpynten, Svalbard, Norway, June 2012.

Solvin Zankl / Bat-eared fox (Otocyon megalotis) scratching face, Namib-Naukluft National Park, Namib Desert, Namibia.

Jabruson / Young wild Chimpanzee (Pan troglodytes schweinfurthii) Tongo, Virunga National Park, Kivu, Democratic Republic of Congo

Eric Baccega / Male Steller sea lion (Eumetopias jubatus) scratching, with a group of females hauled out at a rookery, Prince Rupert, British Columbia, Canada, June.

Eric Baccega / Male Steller sea lion (Eumetopias jubatus) scratching, with a group of females hauled out at a rookery, Prince Rupert, British Columbia, Canada, June.

Mark Taylor / Black-and-white tuxedo male kitten, 'Tuxie' aged 3 months, using a scratching post.

Yva Momatiuk & John Eastcott / Mustang (Equus caballus) red roan foal itches its nose against foreleg in alpine meadow, Montana