Greater Scaup (Aythya marila)


Group	Swans, Geese, and Ducks
Code	ABNJB11060
Order	Anseriformes
Family	Anatidae
Author	(Linnaeus, 1761)
Rank	G5 (definitions)
Occurrence	M (definitions)
Scale	N (definitions)

County List:


Western UP	none
Eastern UP	none
Northern LP	none
Southern LP	none

Rule:

Forested or Nonforested Landscapes

      (Lake or River)
   adjacent to:
      Marsh 2

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Habitat List:

Habitats	Regen	Sap	Pole	Sm Saw	Lg Saw	Uneven
Aspen	no	no	no	no	no	-
Paper Birch	no	no	no	no	no	-
Oak	no	no	no	no	no	no
Assorted Hardwoods	no	no	no	no	no	no
Northern Hardwoods	no	no	no	no	no	no
Spruce/Fir	no	no	no	no	no	no
Hemlock	no	no	no	no	no	no
Jack Pine	no	no	no	no	no	no
Red Pine	no	no	no	no	no	no
White Pine	no	no	no	no	no	no
Conifer Plantations	no	no	no	no	no	-
Mixed Upland Hardwoods	no	no	no	no	no	no
Mixed Northern Hardwoods	no	no	no	no	no	no
Mixed Upland Conifer	no	no	no	no	no	no
Mixed Pine	no	no	no	no	no	no
Swamp Hardwoods	no	no	no	no	no	no
Balsam Poplar & Swamp Aspen & Swamp Birch	no	no	no	no	no	no
Bottomland Hardwoods	no	no	no	no	no	no
Tamarack	no	no	no	no	no	no
Northern White Cedar	no	no	no	no	no	no
Black Spruce	no	no	no	no	no	no
Mixed Lowland Hardwoods	no	no	no	no	no	no
Mixed Lowland Conifer	no	no	no	no	no	no
Non-Forested	Lake, River, Marsh 2 (MARSH)
Special Features	none

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Literature:

Kaufman, K. 1996. Lives of North American Birds. Houghton Mifflin Company, Boston, Massachusetts. 675 pp.

Habitat: Lakes, rivers, salt bays, estuaries. In summer on lakes and bogs in semi-open country near northern limits of boreal forest, and out onto tundra. In winter mainly on coastal bays, lagoons, estuaries, some on inland lakes. Overlaps with Lesser Scaup at all seasons, but in winter the Greater Scaup tends to be on more open bays, more exposed situations.

Diet: Mostly mollusks and plant material. Diet in winter is mainly mussels, clams, oysters, snails, and other mollusks. In summer (and perhaps winter on fresh water) consumes plants including pondweeds, wild celery, sedges, grasses and others; also insects and crustaceans.