RE. Johnson 1967 Journal April 29 Tilden Regional Park, Alameda Co., California 6-10 AM, cool, clear. Zoo 107 B Field trip. Much like April 28. The Bush-tit nest building was again observed (see species accounts for both days). A second Steller Jay nest was located, also in a Eucalyptus tree (see species account). A possible nest site of a Chestnut-backed Chickadee was located in the crotch of a Eucalyptus tree (see species accounts). Species list: Brown-headed Cowbirds Black-headed Grosbeak Orange-crowned Warbler Olive-sided Flycatcher Bush-tit Rufous Hummingbird American Goldfinch Anna Hummingbird Bewick Wren Oregon Junco Brown Towhee Robin Valley Quail Steller Jay Mourning Dove Wren-tit - occasionally singing Brown Creeper - singing Pine Siskin Song Sparrow