You have a Lesser Scaup or commonly known as a Blue Bill, hen. the difference between a Lesser and Greater Scaup hen lies in the eye and bill of the duck. Lesser has an orange colored eye and an almost blackish blue colored bill. The Greater has a light yellow colored eye and a dark blueish grey bill with a black tip. Both go around 1 to 3 pounds with the Greater being a slight bit bigger. Either way they eat well : )