Best friends: These heartwarming images, taken by photographers from all over the world, show a number of animals making friends with their unlikely counterparts in the wild, including this fluffy barn owl and fox cub who appear to be getting along together just fine.

Relaxing: This Northern sea otter and Common Goldeneye Drake duck were spotted chilling out together in the cool waters.

Unlikely friends: A black Caiman crocodile, which measures up to 16ft in length, doesn't appear to mind butterflies sitting on his head.

Perfect pals: A Bernese Mountain dog cuddles up to a tabby kitten (left) while a Masai giraffe appears to have befriended two birds.

Ignore us: This Red Deer doesn't appear to mind the jackdaws resting on his body and antlers as he stands in Richmond Park, London.

Adorable: This cute baby rabbit and two fluffy ducklings don't seem to think three is a crowd as they relax together on a pile of wood.

Need a ride? This welcoming warthog seemed happy to give his comrade, a crow, a piggyback ride in the Republic of Botswana.

Just keep swimming: A Green Sea Turtle glides through the water with three Remora fish - suckerfish - below him in the Red Sea.

Fancy seeing you here: In one of the more remarkable photos, a giant rat chills out on the belly of a fluffy Persian Blue Colourpoint cat.

Greetings! A Tasmanian Devil and Forester Kangaroo welcome each other in woodland in the depths of Tasmania, Australia.

Drying off: An Antarctic Fur Seal relaxes on the shore with two Gentoo Penguins in South Georgia, Antarctic.

Keeping watch: This Buffalo doesn't seem to mind the Oxpecker resting on his head as he stands guard on the Savannah Plains in Africa.

Walkies: A Jack Russell Terrier appeared to make friends with a Red Fox cub during a walk in Buckinghamshire, England.

Opposites attract: Despite their differences, this Cattle Egret - a species of Heron - appears to be fond of this Merino sheep in Portugal.