A pair of adorable swans formed the perfect heart-shape with their necks in a romantic courtship dance.

The love birds were spotted by an eagle-eyed walker who noticed the devoted birds getting into position.

In a video the swans can be seen bending their necks in unison at their home in Clumber Park, Notts.

The birds touch beaks while making the heart-shape before twisting their necks back and forth to complete the act.

The mating ritual signifies the pair have established a territory and are strengthening their bond as the birds begin to mate in March.

Kevin Hutton, 41, recovery lorry driver and yard worker, spotted the pair on a nature walk around the leafy park at the weekend.

The dad-of-four said: "I've never seen it before. I was looking at the info.

"I was walking around Clumber with the family and was recording some ducks and things and I saw them two and started.

"They weren't doing anything, they were relaxing and then they started doing that. It's like a heart shape, it's lovely. Apparently they mate for life.

"It's the heart shape, I've never seen birds make that shape before."

A spokesperson for Nottinghamshire Wildlife Trust said the swans "make this wonderful heart shape with their head and necks as part of a courtship ritual".

They added: "It's that time of the year when the pair will have established a territory and are strengthening their bond."