• East view from Crissy Field overlook with old Coast Guard station on left and city on right

    Presidio of San Francisco


There are park alerts in effect.
show Alerts »
  • CAUTION: Post Storm Damage to Coastal Trail

    The Presidio Coastal Trail segment just north of the Pacific Overlook and adjacent to Lincoln Blvd remains CLOSED indefinitely. We have posted signage to alert bicyclists and hikers and with information for safe trail alternatives. More »

Greater Scaup

(Aythya marila)
Greater Scaup
A male Greater Scaup on left and female on right swim at Crissy Marsh.
Will Elder, NPS

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

Did You Know?

U.S. Army major rank insignia

In 1915, a tragic fire at the Presidio claimed the lives of General Pershing’s wife and his three daughters. Pershing's son, Francis Warren, survived the blaze and chose to enlist in the army as a private during World War II. By the end of the war he had achieved the rank of major.