Gerry Ellis / Chimpanzee (Pan troglodytes) orphan Larry scratching, Ape Action Africa, Mefou Primate Sanctuary, Cameroon

Juergen & Christine Sohns / Meerkat (Suricata suricatta) scratching itself, Tswalu Game Reserve, South Africa

Anup Shah / Eastern Chimpanzee (Pan troglodytes schweinfurthii) forty-three year old female, named Gremlin, scratching face, Gombe National Park, Tanzania

Shane Gross / Bottlenose dolphin (Tursiops truncatus) underwater playing in the shallows off Eleuthera, Bahamas.

Shane Gross / Bottlenose dolphin (Tursiops truncatus) underwater rubbing herself on a sponge off Eleuthera, Bahamas.

Anup Shah / Vervet monkey (Cercopithecus aethiops) male scratching itself - remote camera . Masai Mara National Reserve, Kenya.

Andrew Parkinson / Badger (Meles meles) adult, backlit at sunset, scratching its ears, Derbyshire, UK, May. Winner of the Animal Behaviour category of the British Wildlife Photography Awards (BWPA) Competition 2017.

Dave Bevan / Grey seal (Halichoerus grypus) pup sheltering amongst sand dunes and Maram grass (Ammophila) whilst its mother is away feeding, Norfolk, England, UK. December.

Frederique Olivier / Chinstrap penguin (Pygoscelis antarcticus) moving a feather in its nest, Aitcho Island, South Shetland Islands.

Dave Watts / Female Australian sea lion (Neophoca cinerea) scratching and rolling on a beach, Seal Bay Conservation Area, Kangaroo Island, South Australia.

Francois Savigny / Chinese tiger {Panthera tigris amoyensis} chewing & scratching tree bark to clean claws & teeth. Meuachan Mountains, China, captive.

SCOTLAND: The Big Picture / Red Squirrel (Sciurus vulgaris) scratching, Cairngorms National Park, Highlands, Scotland, UK, December.