Greater scaup dive to feed on aquatic plants and animals. It has a rapid direct flight with strong, quick wing beats. Greater Scaup: This large diving duck has a glossy green-black head, white sides and belly, black tail, neck and breast, barred gray flanks and back. The only circumpolar diving duck, the Greater Scaup breeds across the tundra regions in North America and Europe. The female's bill is similar to that of the male, but slightly duller, and the legs and feet are gray. The female is dull brown with a white patch on the face at base of bill.
Winters on lakes, reservoirs, rivers, sheltered areas of coastal bays. Chironomidae comprised 40% of lesser scaup diet by weight in winter 2017–2018, but 71% in winter 2016–2017. Diet / Feeding: The Greater Scaup mainly eats mollusks and aquatic plants, obtained by diving and swimming underwater.
The Greater Scaup is very similar in appearance to its close cousin, the Lesser Scaup, but is generally found further north in the summer, is only rarely found very far inland in winter, and can also be found in northern Europe and Asia.See notes below for differentiating between Greater and Lesser Scaup.
The female is dull brown with a white patch on the face at base of bill. We suspect that scaup increasingly exploited fish in colder winters, perhaps because of the birds' increased energy demands, prey availability, and ease of capture, or some combination of these. Fish comprised about 13% of the overall diet of greater scaup. The Greater and Lesser Scaup can be difficult to distinguish in the field.
Winter flocks on coastal bays may number in the thousands. The male has a black chest and tail, white sides, and a barred gray back. His head and neck look black, but are actually a greenish-black.
Unlike its smaller cousin, the lesser scaup, the greater scaup can be found across Eurasia as well as North America. Marsh ponds (summer), lakes, bays, estuaries.
The Greater Scaup averages about 10% longer and 20% heavier than the Lesser Scaup. Greater and Lesser Scaups can be difficult to distinguish in the field.
Most Viewed Birds.
The greater scaup is a medium-sized diving duck is 15-22 inches in length with a wingspan of about 28-30 inches. The Greater Scaup is one of the species to which the Agreement on the Conservation of African-Eurasian Migratory Waterbirds (AEWA) applies. Diving ducks staging on the lower Great Lakes have responded to the introduction and subsequent population increase of zebra mussels (Dreissena polymorpha) by consuming this readily available food. The female is brown and has a white patch at the base of her bill. The Lesser Scaup has a peaked, angular head that the Greater Scaup lacks. Females, juveniles and drakes in eclipse plumage are hard to identify; there is considerable overlap in length between the two species, but greater scaup are usually noticeably more bulky. What do Owls Eat; Saber Tooth Tiger Facts ; Box Jellyfish Facts; Antarctica Facts for Kids; Miami Tribe Facts White Tiger Facts; Gorilla Facts for Kids; Lion Facts for Kids; Florida Facts For Kids; Colorado Facts For Kids; Select a Bird.
The greater scaup and lesser scaup are some of the most challenging waterfowl for birders to distinguish between, and there is no single indicator that is clear for either bird. In the winter, clams make up a large portion of the diet, especially in marine habitats. The oldest recorded greater scaup was a male that was at least 20 years. Here, black-and-white males and chocolatey-brown females bob along on the waves.
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