Bufflehead and goldeneye ducks occasionally nest near the lakes. Waterfowl are primarily American black ducks and bufflehead. The bufflehead ranges from long and weighs , with the drakes larger than the females. The bufflehead ("Bucephala albeola") is a small sea duck of the genus "Bucephala", the goldeneyes. The bufflehead is an extremely rare vagrant to western Europe. Sidney's most famous inhabitant is the bufflehead featured prominently on its coat of arms.