It's all about the swans and cygnets. 
Daddy Swan thought that the duck was a threat, although I didn't personally think there would be a problem. 'Be off with you duck' 'go on, get off', we'll daddy just wouldn't let it go and the duck started winding daddy up. 'Come on, bring it on you long necked beast, come on catch me' duck ducks here and there, taunting, leading the Swan back and forth. Oh, it's getting serious now, daddy is getting mad but just can't quite reach this pesky duck. He's now quite a way from mummy and babies and duck is really enjoying himself. Just when Swan takes a killing leap, up flies duck, up and over, right back to near mummy and babies. We were entertained!!