A young elk rescued from a flooding river by a farmer in Inje, Gangwon Province, South Korea. It was adopted by a female dog that breastfeeds and guards him

Eight-month-old orphan elephant Themba, whose name means hope in Xhosa, who has struck up a friendship with a sheep called Albert at the Shamwari Game Reserve in South Africa

Bella the foxhound and Maggie the fox have become firm friends at an animal sanctuary in Essex

Bea, a three-year-old giraffe, and Wilma, an ostrich, have become the best of friends at Busch Gardens Tampa Bay, Florida

A lewd lemur sticks his tongue out at a parrot in Hamburg, Germany

A five-week-old boar, named Manni, plays with a Jack Russell terrier called Candy in Ehringhausen, Germany

Paloma the pot-bellied pig lives together with owner Mico and her Jack Russell Terrier Dog Flippo

A tiger cub and a pig snooze together, at the Sriracha Tiger Zoo, in Thailand

Anjana, a two-and-a-half year-old chimpanzee, looks after his new best friend, a 21 day old white tiger cub, at T.I.G.E.R.S (The Institute of Greatly Endangered and Rare Species), in Myrtle Beach, South Carolina

Suryia the Orangutan and Roscoe the Blue Tick Hound are best of friends at the T.I.G.E.R.S sanctuary in Myrtle Beach, South Carolina.

Usually prey for these tawny owl chicks, this thrush has been accepted as their pal

Tinkabelle the sheep stands with her two dog friends. Tinkabelle apparently believes she is a dog after being lovingly nurtured by a pet labrador