greater scaup
small, diving duck black head and neck white patch on the side of the head grayish-black back and wings white underside blue bill yellow eyes
greater scaup which has small, diving duck greater scaup which has black head and neck greater scaup which has white patch on the side of the head greater scaup which has grayish-black back and wings greater scaup which has white underside greater scaup which has blue bill greater scaup which has yellow eyes