Bence Mate / Leaf cutter ant (Atta sp) female worker carrying leaf to nest, with a smaller 'minor' ant riding. The minor's job is to protect her sister from parasitic flies. Costa Rica, December. Highly Commended,...

Enrique Lopez-Tapia / Tourists riding Bactrian camels (Camelus bactrianus) in sand dunes, Nubra Valley. Ladakh, India, September 2018.

Steve Downer / Juvenile Common frog (Rana temporaria) on back of a Common snail (Cornu aspersum), UK, June.

Steve Downer / Juvenile Common frog (Rana temporaria) on back of a Common snail (Cornu aspersum), UK, June.

Sebastian Kennerknecht / American Bison (Bison bison) female in snow, Riding Mountain National Park, Manitoba, Canada

Yashpal Rathore / Sloth bear (Melursus ursinus) cubs riding on mothers back, Daroiji Bear Sanctuary, Karnataka, India.

Yashpal Rathore / Sloth bear (Melursus ursinus) cub riding on mothers back, Daroiji Bear Sanctuary, Karnataka, India.

Alfred Trunk/ BIA / Common Merganser (Mergus merganser) mother carrying chick, Upper Austria, Austria

Anup Shah / Eastern Chimpanzee (Pan troglodytes schweinfurthii) fifteen year old mother carrying her twenty-one month old daughter, Gombe National Park, Tanzania

Konrad Wothe / Common Merganser (Mergus merganser) mother with chicks, Upper Bavaria, Germany

Steve Downer / Grove snail / brown lipped snail (Cepaea nemoralis) with juvenile riding on its back, Birmingham UK June.

Steve Downer / Close up of Mute swan cygnets (Cygnus olor) riding on their mother's back, Birmingham, England, UK, May.