Carol Walker / Wild horse / mustang, mare rolling, Pryor Mountains, Montana, USA, July

Fiona Rogers / Bornean Orang-utan (Pongo pygmaeus wurmbii) female 'Tutut' cradling her sleeping baby 'Thor' aged 8-9 months head portrait. Camp Leakey, Tanjung Puting National Park, Central Kalimantan, Borneo, Indon...

Christophe Courteau / Female Leopard (Panthera pardus) scratching, Sabi Sand Private Game Reserve, South Africa, June

TJ Rich / Young Southern Elephant Seal sleeping (Mirounga leonina) Falkland Islands

Suzi Eszterhas / Hippopotamus {Hippopotamus amphibius} young calf sleeping against mother, Masai Mara Reserve, Kenya