A pair of adorable swans formed the perfect heart-shape with their necks in a romantic courtship dance. <br /><br />The love birds were spotted by an eagle-eyed walker who noticed the devoted birds getting into position. <br /><br />In a video the swans can be seen bending their necks in unison at their home in Clumber Park, Notts.<br /><br />The birds touch beaks while making the heart-shape before twisting their necks back and forth to complete the act.<br /><br />The mating ritual signifies the pair have established a territory and are strengthening their bond as the birds begin to mate in March. <br /><br />Kevin Hutton, 41, recovery lorry driver and yard worker, spotted the pair on a nature walk around the leafy park at the weekend.<br /><br />The dad-of-four said: "I've never seen it before. I was looking at the info. <br /><br />"I was walking around Clumber with the family and was recording some ducks and things and I saw them two and started. <br /><br />"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.<br /><br />"It's the heart shape, I've never seen birds make that shape before."<br /><br />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".<br /><br />They added: "It's that time of the year when the pair will have established a territory and are strengthening their bond."