Neil Cooper spotted the ducks in Hotham Park in Bognor Regis, West Sussex, while out for a walk on Tuesday morning.
He said: “I came across this flock of little yellow ducks inhabiting the ornamental pond in Hotham Park this morning - they seem to of mysteriously appeared overnight. “I took some video and immediately contacted Bognor Town Council Events as they seem to have a duck theme going on. But they are as mystified about it as I am. “I guess we will have to wait and see where the tail leads.”