These animals have found some of the most unlikely of friends to keep them company.
Check out our slideshow to see some quirky animal friendship.
A female monkey fondly cuddles a puppy at a shop in the Bangladeshi capital Dhaka.
Keow Wan, a four-month-old Sun Conure parrot, perches on Yim, a dog whose name means smile in Thai, as their owners take part in a pray for peace ceremony at Royal Plaza in Bangkok.
Lioness ‘Soonee’ and South Korean traditional breed Jindo dog ‘Tangchil’ play together at a zoo in Chinhae near Seoul.
Palma the dog plays with a four-month-old Amur tiger cub (L) and a two-month-old Sumatran tiger cub in the municipal zoo ‘Royev Ruchey’ in the Siberian city of Krasnoyarsk.
A baby rhesus macaque (Macaca mulatta) touches the face of a tiger cub as they play together at a zoo in Hefei, Anhui province, China.
Changmao, the ram and Chunzi, the doe stand together during a cross-species wedding ceremony at Yunnan Wild Animal Park on Valentine’s Day in Kunming, Yunnan province.
A one year-old baby Hippotamus, Owen, gets close to his adopted ‘mother’, a giant male Aldabran tortoise at Haller Park on Kenya’s coast of Mombasa.
A Ring-tailed Lemur (Lemur catta) and a parrot (Gebirgslori) are seen in their enclosure at the Hagenbeck Zoo in Hamburg.
A four-month-old Amur tiger cub (top) plays with a dog in the municipal zoo ‘Royev Ruchey’ in the Siberian city of Krasnoyarsk.
A monkey does a handstand on the head of a sheep during a performance at a temple fair held to celebrate the upcoming Chinese New Year in Beijing.
Nimra, a one-year-old cat, plays with chicks in Amman. Nimra has been taking care of seven chicks after their mother’s death a month ago.