Found on lakes, ponds, and bays. Mostly marine in winter.Back to top
Clams, snails, crustaceans, aquatic insects, seeds, and aquatic plants.Back to top
Bowl-shaped depression in ground, usually lined with grasses and a thick layer of down. Placed in tall grass in an area not subject to flooding.
|Clutch Size:||5-13 eggs|
|Egg Description:||Brownish olive-buff.|
|Condition at Hatching:||Downy and eyes open. Leave nest as soon as they are dry. Feed themselves immediately.|
Dives under water to capture food.Back to top
Greater Scaup numbers appear to have declined since the 1950's according to the U.S. Fish & Wildlife Service. However, population trends are difficult to estimate, in part because of similarities to abundant Lesser Scaup, making accurate winter counts difficult to obtain. The 2014 State of the Birds lists Greater Scaup as a Common Bird in Steep Decline. Back to top
Kessel, Brina, Deborah A. Rocque and John S. Barclay. 2002. Greater Scaup (Aythya marila), version 2.0. In The Birds of North America (P. G. Rodewald, editor). Cornell Lab of Ornithology, Ithaca, New York, USA.
Lutmerding, J. A. and A. S. Love. Longevity records of North American birds. Version 2015.2. Patuxent Wildlife Research Center, Bird Banding Laboratory 2015.
North American Bird Conservation Initiative. 2014. The State of the Birds 2014 Report. US Department of Interior, Washington, DC, USA.
Sibley, David Allen. 2014. The Sibley guide to birds, second edition. Alfred A Knopf, New York.
U.S. Fish and Wildlife Service. 2015. Waterfowl population status, 2015. Washington, DC: U.S. Department of the Interior.