Tui De Roy / Nazca booby (Sula granti) portrait, Galapagos, Ecuador.

Ingo Arndt / Grizzly Bear / Coastal Brown Bear (Ursus arctos horribilis) mother with two spring cubs, one riding on her back, Lake Clark National Park, Alaska, USA. June.

Tui De Roy / Blue-footed booby (Sula nebouxii) 'dancing' courtship display, Santa Cruz Island, Galapagos, Ecuador.

Bence Mate / Head portrait of King vulture (Sarcoramphus papa) Santa Rita, Costa Rica

Bence Mate / Head portrait of Dalmatian pelican (Pelecanus crispus) with pouched bill wide open. Danube Delta, Romania

Mark Taylor / Young windmill-eared rabbit and matching guinea-pig.

Mark Taylor / Ginger kitten, 7 weeks, sitting between two young Lionhead-Lop rabbits.

Jane Burton / Black-and-white Border Collie bitch lying chin on floor with black-and-white kitten.

Alex Mustard / A domestic pig (Sus scrofa domestica) swimming in the sea. Exuma Cays, Bahamas. Tropical West Atlantic Ocean. This family of pigs live on this beach in the Bahamas and enjoy swimming in the sea.

TJ Rich / Great horned owl (Bubo virginianus) chick. Captive bred, occurs in the Americas.

Pascal Kobeh / Close-up of Shortspine porcupinefish (Diodon holocanthus), coast of Dhofar and Hallaniyat islands, Oman. Arabian Sea.

Roland Seitre / Black-footed rock-wallaby (Petrogale lateralis) joey in pouch and young looking at him, Heavitree Gap, Alice Springs, Northern Territory, Australia.