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Presidio of San Francisco
Greater Scaup
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| Will Elder, NPS |
| A male Greater Scaup on left and female on right swim at Crissy Marsh. |
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Natural History: The Greater Scaup dives primarily for mollusks and other aquatic invertebrates but also feeds on aquatic plants, especially in freshwater environments. In the winter it can be seen in small to large flocks. It nests in depression in mash grass in the arctic.
General Distribution: In the Presidio, this species can be found in salt and fresh water environments.
Frequency: This animal is commonly seen in the fall, spring and winter; it breeds in the arctic in the summer.
Identifying Characteristics: The males of this species have a black head and chest and white underside. The females have a dark head with a white patch in front of the bill, and a rusty color chest and dusky brown body. The bills are bluish. The head is more smoothly rounded than that of the Lesser Scaup.
Presidio Birds main page
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| |  | | Did You Know? The Presidio occupies 1,491 acres in northern San Francisco and welcomes over five million visitors annually. more... | | |
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Last Updated: February 23, 2008 at 18:54 MST |