Remsen, J.V. 1975 Journal Jan.24 Tilden Regional Park, Contra Costa Co., Calif. Area: open field just e. of Wildcat Creek just s.e. of Playfield parking lot. (surrounded by live oak, riparian, Monterey Pine, and chaparral Time: 0800-1200 Observers: Zoology 107 field trip Temp: 40-60 Sky: clear Wind: calm Comments: This field trip was devoted to studying Brown Towhees and so other species were not sought out and only noted incidentally Species: Turkey Vulture 1 Hermit Thrush 1 Accipiter (sp) 11 Ruby-crowned Kinglet 2 Red-tailed Hawk 4 HuHon's Vireo 2 California Quail 2 Myrtle Warbler 2 Band-tailed Pigeon 4 Purple Finch 2 Mourning Dove 1 Pine Siskin 2 Annals Hummingbird 2 Am. Goldfinch 1 Red-shafted Flicker 3 Rufous-sided Towhee 4 Hairy Woodpecker 1 Brown Towhee 8 Downy Woodpecker 1 Oregon Junco 3 Black Phoebe 1 Golden-crowned Sparrow 4 Steller's Jay 15 Fox Sparrow 2 Scrub Jay 10 Song Sparrow 4 Chestnut-backed Chickadee 4 Plain Titmouse 1 Bushtit 5 Bewick's Wren 2 Calif. Thrasher 2 Varied Thrush 5 Jan.31 Berkeley Aquatic Park, Alameda Co., Calif Time: 0800-1040 Observers: Zoology 107 field trip Temp: 40-45 Sky: overcast, some light rain Wind: 15-30S Species: Eared Grebe 1 Killdeer 2 Pied-billed Grebe 10 Willet 3 Double-crested Cormorant 3 Long-billed Dowitcher 1 Great Egret 4 Dunlin 4 Snowy Egret 2 Least Sandpiper 1 N. Pintail 30 Am. Avocet 7 Canvasback 5 Glaucous-winged Gull 8 Lesser Scaup 8 Western Gull 5 Com. Goldeneye 6 Herring Gull 1 Bufflehead 5 Thayer's Gull 1 Ruddy Duck 60 California Gull 100 Red-breasted Merganser 15 Ring-billed Gull 50 American Coot 100 Mew Gull 2