Cogswell 1950 "Journal" 1. DONNER PASS, LAKE TAHOE, and nearby areas in the north- ern SIERRA NEVADA and immediately adjacent western NEVADA valleys. All notes in this notebook being of observations made while I was employed (June 17 - Aug. 26) as in- structor in "Birds" at the Audubon Camp of California, Norden, Calif. NO REGULAR JOURNAL OF ACTIVITIES WAS KEPT, the task of recording as many "habitat" and "stage of breeding cycle" notes for each bird species (as well as simple occurrence of the less common ones) taking more time than I could spare. Consequently the entries under the species accounts were made at various times -- from the very moment of observation in certain cases to sev- eral weeks after camp closed in others. Records of the latter type are almost all simple statements of occur- rence, and were taken from the daily tally record of birds seen on the various class periods, which record I kept in my personal roll book all summer. A LIST OF LOCALITIES VISITED follows, arranged alphe- betically, with descriptions of the major vegetation and/or rock types of each and the dates on which they were visited by me. For a complete log of my observa- tion times, see pp 18-24 of this Journal. See also map of region covered, with routes marked in red, fol- lowing page 34. dirt road American River Canyon Road --/extending south from Soda Springs, past Ice Lakes (Serena + Dulzura), etc. Stops were made for bird-finding at 3 mi. W., 2 mi. S Donner Pass, 6800+ feet; at 2 1/2 mi. W, 3 1/4 and 3 1/2 mi. S Donner Pass, 6500 ft., & 6300 ft. respectively; and (on Aug. 22) in bottom of Onion Creek Canyon (q.v.). VEG. TYPES: 6800 ft.-- red fir- lodgepole and Jeffrey pine forest, with considerable manzanita and Ceanothus cordulatus & Quercus vaccinifolium understory in more open parts (density of trees very variable from spot to spot due to logging history); a few large sugar pines downslope; 6500 ft.-- white fir, Jeffrey (& yellow ?) pine forest, with few in- cense cedars & lodgepole pines; a large chaparral area just below road continues into next; 6300 ft. -- extensive montane chaparral (Prunus emarginata, Arctostaphylos patula, Ceanothus cordulatus, Quercus vaccinifolium, Castanopsis sempervirens) with few young black oaks protruding thru it, & scattered few Pinus ponderosa ssp.; a few Juniperus occidental- is on rock outcrop. Large, glaciated valley below this spot. including here, however, several species frequent