P. 11 Journal The [illegible] one on the left as one drives out on Pt. Isabel. Flock of more than 300 gulls were congregated in open area (parking area?) South of Golden Gate Fields, W of East Shore Hwy. These gulls seemed separated to a certain extent by species. Western and Glaucous-winged seemed to remain together. (Glaucous-winged were far more abundant) Ring-billed were presenting some number and associated to a couple of short-tailed and several Californians. Two young gulls [illegible] were very light brown and showed light colored primaries They may have been Glaucous Gulls. Returned to Berkeley at about 2:00 PM. Feb. 17 Jeff Berkeley at about 9:15 AM. & Al Ziegler and Marianne Hobbs. The traps at the marsh at Martiney yielded the following trapping results: those that had been in operation for the 4th consecutive night along the ditch - 15 Ruthros, 2 mus, 2 mics. and those in the open area 17 Ruthros and 3 mus. The one hundred traps set on Feb. 16 near the edge 0.4 NW of this previous area: 22 Ruthros, 6 mus, 7 Mics, 2 sorex. All traps were taken up. Returned to Berkeley about 11:45 PM. Feb. Left Berkeley & Paul Anderson @ 8:30 AM. Took left boat to Brooks Island, (San Francisco Bay), Contra Costa Co. 190 traps were set mostly along the lowland of the south shore and the adjacent area on the rid. This represented most of the area burned the previous fall (aprox Oct. 1956 according to P. Anderson) The lowland area showed many trails presumably made by rats (Rattus). One was aroused from a nest and utilized them in it's escape. Returned to Berkeley by 2:00 PM. Feb. Returned to Brooks Is. with Jay Schnell. Weather was poor; rain, stiff breeze from NW, followed by fog. Previous night, however, not raining. Trapping results were as follows: 4 mus, one eaten entirely, identification by lower jaw which was found near trap. According to P. Anderson there was a high density population of Microtus prior to the fire mentioned above.