Rana catesbiana 20 Aug Hashell Ranch, 10 mi. S. Marysville, Yuba Co., Cal. (A.S. Leopold Ranch). Frogs of this species are abundant in the cuttail marsh here, where Thamnophis sirtalis (q.v.) was also taken. The Bullhogs occur in all parts of the marsh where there is water, but especially in the more open, deep areas. They are abundant, much in evidence due to their constant splashing, preceded by an explosive "eth" before the jump. In areas where the water is thickly covered by algae the frogs near the edge shim over the top for a distance of 5 or 6 feet by making 3-4 short, but rapid leaps, and then settle in the water, head protruding. They may, but usually don't, repeat this performance, especially if they have not cleared the vegetation. They tend to move into areas of heavy tules and/or cuttails. The frogs are heard calling a low "arrump" rather constantly all day & night, though they may have stopped this hot noon P.M. Yesterday it was cooler, and it rained, and this was not the case. No tadpoles were seen.