Skip to Main Content
U.S. Forest Service
Caring for the land and serving people

United States Department of Agriculture

Home > Search > Publication Information

  1. Share via EmailShare on FacebookShare on LinkedInShare on Twitter
    Dislike this pubLike this pub
    Author(s): William O. Wirtz
    Date: 1991
    Source: Res. Pap. PSW-209. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station. 19 p
    Publication Series: Research Paper (RP)
    Station: Pacific Southwest Research Station
    PDF: Download Publication  (1.0 MB)


    Dates were obtained between February 1969 and October 1979 on the seasonal occurrence, habitat association, reproductive phenology, and relative abundance of avifauna at two study sites in the chaparral community of the San Gabriel Mountains of southern California. The purpose of the study was to collect information on bird species use of this habitat and to document changes in the bird community over a 30-year period. During the study, 128 species representing 36 families were noted: 99 in lower elevation(914 to 1280 m) chaparral and 110 at a higher elevation (1400m)chaparral yellow pine ecotone site. Eighty-two species were observed at both sites. Residence comprised 35.4 percent of the population at the lower elevation site and 25.4 percent at the higher site. Vagrants comprised 18.2 percent of the population at the lower site and 23.6 percent at the higher site. Insects are consumed by 66.7 percent of all avifauna observed in the chaparral and seeds by 32.6 percent. Fourteen species reported earlier (1936-1953) at the lower site, mostly migrants, were not observed. Twenty-two species not reported earlier(1936-1953)at the lower site, mostly vagrants, were noted. Breeding of 24 residents and 13 spring breeding species in the chaparral is documented; an additional 11 residents and 5 spring breeding species are considered likely to breed here. The appendix presents a summary of 11 years of data on abundance at both locations.

    Publication Notes

    • You may send email to to request a hard copy of this publication.
    • (Please specify exactly which publication you are requesting and your mailing address.)
    • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.


    Wirtz, William O., II. 1991. Avifauna in southern California chaparral: seasonal distribution, habitat association, reproductive phenology. Res. Pap. PSW-RP-209. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station. 19 p


    Google Scholar


    bird community, seasonal distribution, avifauna, chaparral, San Gabriel Mountains, southern California

    Related Search

    XML: View XML
Show More
Show Fewer
Jump to Top of Page