Two polar bears living in the Highlands appear to have celebrated “World Bromance Day” – with a bear hug.

Walker and Arktos have been best friends since being introduced to each other at The Royal Zoological Society of Scotland Highland Wildlife Park in April 2012.

And the pair seemed to show off their relationship by getting into the spirit of World Bromance Day, which takes place six months after Valentine’s Day.

Una Richardson, head keeper at the park, said: “Our polar bear bromance at RZSS Highland Wildlife Park is clear for everyone to see. From play fighting to dunking each other under water and generally messing around, the pair get on extremely well.

“It is a real pleasure to watch their friendship flourish and continue to grow after so many years together.”

Walker arrived at the park in Kingussie from Rhenen Zoo in the Netherlands in October 2010. He was followed two years later by Arktos, from Hanover Zoo, in April 2012.

They are the only male polar bears in Scotland but the park is also home to the UK’s only female polar bear, Victoria, who arrived in March 2015.

Polar bears are currently listed as vulnerable on the IUCN Red List of endangered species.

Climate change is predicted to cause further sea ice losses and it is estimated that the global population could decline by over 30% in just three generations.