Cogswell 1949 Aug. 8-19 Big Lagoon, Humboldt Co., Calif. numbers of a small colony foraged over all habitats -- even above twelve redwood forest. Their perching headquarters was, however, in a group of tall dead trees in the bit of dry pasture along maple creek valley by our camp. One (?) was observed at the abandoned ranch at 550' altitude, 1/2 mile E. of the lagoon, on the W. face of the first ridge. A larger flock, estimated at 30 individuals was flying about, calling, a perching in the tall dead trees of the 3-year old burn 1 1/2 mi. inland from the lagoon along maple creek on Aug. 18. The lowest perch any martins were seen to occupy was the top of a 1 1/2-foot diameter piling about 15 ft. high -- at the border of the marsh.