Cogswell 1948 Nycticorax nycticorax Oct. 17 - Point Richmond, Contra Costa Co., Calif. 11:10 - a single "quok" call heard from top of eucalyptus trees in yard between 125 Western Dr. and small sandy beach. Miss Jacqueline Watkins who lives at that address & is familiar with the birds, say that about 10-12 of them roost in the trees regularly except during the spring and early summer. 1949 Nov. 21-23 - Hill Court Albany, Alameda Co., Calif. every evening at dusk (white I've been confined to the house by illness) a small group of 4 or 5 birds has flown over our house toward the San Francisco Bay shore - calling "quok" several times as they go. They apparently roost during day in the Cypress trees between Codornices Village & the Hill Experimental Tract, & fly out to feed in the evening on the tidal flats. Dec. 4. Gray Lodge Refuge, S.W. Butte Co., Calif. - an estimated 400 or more were resting in & on cat tails of pond within loop road closest to refuge headquarters. This is, I believe, the largest concentration I have ever seen at one place.