American Egret R.E.Johnson 1967 March 19 Stinson Beach, Marin Co., California (cont.) more frequently angled forward. The heron is more often erect both when standing & walking. Continued observation indicates that both heron & egret will wade above "knees" while feeding, but perhaps (?) heron does so more often. June 8 In grading a Zoo 107B Term Project by Richard Dehlinger, who studied the three species of Ardeidae [illegible] in this same area [Bolinas Lagoon (north of Stinson Beach) and Audubon Canyon Ranch (east side of lagoon)] I note the following points: ① Amer. Egrets (& Great Blue Herons) rest in colonies in the tops of second growth redwood trees at Audubon Canyon Ranch. ② The lagoon is deeper at its northern end & greater concentrations of birds occur there. ③ Amer Egrets (& Herons, but not Snowy Egret) feed also in adjacent marshy areas. ④ Amer. Egrets arrive later & leave earlier to feed (from nesting area) than Herons. ⑤ Amer. Egret feeds at faster rate than Heron ⑥ Amer. Egret is more efficient at feeding on fish (greater % successful "stabs"). ⑦ Amer. Egrets (& Herons) appear to feed on craps in Ulva beds in the lagoon.