Bownow 1952. Journal 22. Aug. 23 3mi SW Tres Piedras, 9000 ft, Rio Arriba Co, New Mexico. Was impressed by the large numbers of warblers passing through area. Observed chiefly on the hill tops in yellow pine & aspen. Usually seen in small groups, feeling very briefly & then moving on. No definite N-S movement apparent. Today I observed large numbers (20+ at one time) Pygmy Nuthatches feeding in aspen groves. Birds were exceedingly tame. I could approach to within 3 feet of birds while "squatting". Although few birds were killed today, much of my time spent in exploring the distribution of major tree types. At an estimated 8000 ft level noted the following trees & shrubs growing within a 1/2 acre plot of land: yellow pine, a juniperus?, a fir (sp?), aspen, chrysothamnus, & sagebrush. Here we have an upper sonoran plant (Juniper) growing side by side with a Canadian (fir) type species. How does this fit the life-zone concept? Found one small group of 10 fir trees growing on exceedingly rough terrain -- 3 ft boulders & a NW exposure. Trees were all mature & about 50 ft tall. At nearby found 1 Ground Squirrel & 1 Chipmunk found among rocks. About 3/4 dist out found several 6 ft. fir trees growing up under a dense stand of aspen. Obvious signs of lumbering & grazing. No sign of a house. On the W facing slope, just over the crest of a hill, found oak growing to a height of 15 ft, with a basal diameter of 10 inches: Discovered a shallow lake,