Logswell 1949 Journal 32 E.of Spruce St. entrance of Apr. 16- Wildcat Canyon, Tilden Regional Park Contra Costa Co. Calif. Spent period from 8:30 AM - 2:00 PM here with Dr. Ditka's Ecology class, studying invertebrate animal life on 1 sq. meter quadrats; Birds observed incidental to this are entered in my roll book record. No life history notes taken. Black Phoebe {nesting near under Golden Gate Fields} Apr. 22- Access Highway, Richmond + Albany, Contra Costa + Alameda Co. Calif - Surveyed spring shorebirds briefly from the car. Species seen listed in my roll book. [See also, in species accounts, no abundance of: Erolia alpina, Eremetes mauri] Apr. 23- Bay Farm Id., Alameda, Alameda Co. Calif.- I went with group of about 12 students in Zoology 11/3 course led by Bob Bailey, for study of shorebirds along Doolittle Drive to the "avocet pond" beyond Alameda city limits + return.. Tidal was high at first & we saw little except those far out on hummocks in marsh by bay shore. R.W. Storer covered the area for his shorebird census, so no list will be made here. [See species accounts for Erolia alpina, E. minutilla, Eremetes mauri, & Charadrius vociferans & C. hiaticula]. I went alone, about noon, to the big flat NE of Island Road & Maitland Drive, walking out from point "E" on Storer's map. From there I estimated a total shorebird population well in excess of 100,000 - perhaps 3 times that many. in sight at once.