Koford, Rolf 1974 Journal 12 Dec. 7.5 mi. due west of Mecedero, Baja California del Norte, Mexico ~ 150 ft. We only caught 1 Reithrodontomys (Dr. Lidicker did) and left after breakfast. We went south to Ensenada, where we got some food, then south about 7 miles to the Punta Banda turnoff. We turned west and went several miles along the road looking for Microtus habitat. Finally we set up camp 7.5 mi west of Mecedero, to the north of the road. A small dirt road turned off and went downhill to a place which was formerly the Three Sisters campground. We set up camp there and put up skins and processed tissue and blood of the animals still alive. The Dipodomys had all died, but the Peromyscus were doing okay. About 1500 Dave Krehno, Bill Glanz, Dave Bredford, and I went back west on the road to set out traps in some more mesic and grassy areas. We found some scats which appeared to be Microtus-like, but no cuttings or runways. We set some traps in a ditch with grass, an alfalfa field, and a couple old pepper fields, returning to camp after dark. The others had in the meantime processed more material and set out traps around camp. The area here was dry agaves and chaparral, almost next to a cliff going down to the bay by Ensenada. Dr. Lidicker and Pete had seen some Microtus-type cuttings around camp. We saw a couple Berkeley ground squirrels on the way here. Also seen today were Cormorants, white and brown pelicans, a burrowing owl, snowy plover, sandpipers, white-tailed kite kestrel, red-tailed hawk, western kingbird, crow, raven, western meadowlark, etc. Wind 5-15 mph; temp. mid-40's to about 60°F; sky clear,