The Lesser Scaup is a medium-sized diving duck that breeds in North America. It is also known by several other names, such as the Little Bluebill, Lesser Blackhead, and Riverhead Duck. This bird is a species of the Aythya genus, which includes other diving ducks such as the Common Pochard and the Tufted Duck. The Lesser Scaup is a popular game bird and is hunted for sport and food. It has a distinctive blue bill and a dark head with a greenish sheen, and its plumage is mostly grayish-brown. The Lesser Scaup is a fascinating and beautiful bird that is worth learning about.