Natural History: This bird forages for fish, mostly by diving and being able to stay underwater for about 30 seconds. It tends to rest and roost on offshore cliffs and on rocks, wharfs, and branches. It sometimes rests on water. Its takeoff is quite laborious. The nests are quite sensitive to disturbance and are found on rocky cliffs, slopes, and tall trees. Breeding season runs from April to August. This species is monogamous by nature and nests colonially.
General Distribution: In the Presidio, this species can be found in bays, the ocean, ponds, and tidal rocky areas.
Frequency: The Double-crested Cormorant is common throughout the year within the Presidio.
Identifying Characteristics: This bird has the tendency to be an upright percher with a S-shaped neck and hook-tipped bill. Unlike its relative, the Brandt's Cormorant, this species displays an orange-yellow throat pouch. These birds tend to cluster in silent flocks, forming in geese-like patterns.
Did You Know?
In 1776, Father Pedro Font wrote, "The port of San Francisco...is a marvel of nature, and might well be called a harbor of harbors...And I think if it could be well settled like Europe there would not be anything more beautiful in all the world."