1948 Phalacrocorax penicillatus Dec.18 - Tomales Bay, Marin Co. Calif. By far the commonest cormorant here. Large flocks come flying in toward Miner Bay (!- seems a little out of usual feeding place for this sp.) from out toward ocean. No densely packed fishing flocks were seen. A little later many are going back out again; some still coming in. All flocks fly in a somewhat staggered, irregular line - and frequently they rise, in succession, as though over an obstacle. [See Sula stellata for comparison of flight of flocks of respective species] 1949 July 17- 17-mile Drive, Monterey Peninsula, Calif. - common - small to large (100+) flights going up and down coast at all times. "Bird Rock" between Sts. Joe & Cypress is black with them - probably easily 10-15,000 birds. Many nests containing nearly grown, but still partly downy young are visible from the mainland. They can also be smelled! (Photos taken of colony) St. Lobo's, Monterey Co. Calif. - on the largest "Bird Island" off the south shore are fully 15,000 cormorants - the vast majority of them this species. The big concentration is on the flat area above the cliffs, which latter harbor chiefly P. pelagicus. All young of P. penicillatus seemed well grown, but not flying. (Several photos taken)