Koford, R. 1974 Journal 14 Dec. Corona de Abajo, 2 3/4 mi. E Meling Ranch, Baja Calif. del Norte, Mexico ~6400 ft. rocky in places, with rugged terrain almost everywhere. Pete Escoler saw a chipmunk (Eutamias merriami) run across the road and some thought it might have been a chickaree. I looked for chickaree sign as I set traps (I used black walnuts for bait) but saw no cone cores from this year though there were many of this years cones on the ground. There were small pools of water in a streambed north of our camp and birds (pygmy nuthatch, hermit thrushes mostly) seemed to use the pools for drinking. After we set up camp we processed material and put up skins until about midnight. At San Telmo de Abajo site we saw Audobon's warblers, white-crowned sparrows, Calif quail, American kestrel, brown towlees, mountain bluebirds. At the two San Pedro Martir localities we saw scrub jays, many pygmy nuthatches, red-slatted flicker, Oregon juncos, hermit thrushes, robin, fox sparrow, mountain chickadees, white-crowned sparrows, song sparrow, ruby-crowned kinglet, western bluebird, red-tailed hawk. The sky was clear, wind light, temp. around 45° F in the morning, rising to about 70° F. 15 Dec. 9.2 mi. E, 6.6 mi. S Colonia Cardenas, Baja Calif. del Norte, Mexico ~1050 m. We checked our traps in the morning and left them set if they hadn't caught an animal. At Corona de Abajo Peromyscus maximilator truei and Neotoma fascipes were caught. I got nothing in my squirrel traps, which I picked up around noon shortly before we left. Oak crossing yielded ( Eutamias merriami (colli Bradford) and Peromyscus boylii