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): H.F. Sakai; B.R. Noon
    Date: 1991
    Source: Condor. 93(3): 563-574
    Publication Series: Miscellaneous Publication
    PDF: View PDF  (217.0 KB)

    Description

    Thirty nests of Hammond’s (Empidonax hammondii) and 88 nests of Pacificslope (E. difficilis) Flycatchers were located in different-aged Douglas-fir (Pseudotsuga menziesii)/ tanoak (Lithocarpus densiflorus) dominated forests at 12 study sites in northwestern California during the breeding seasons of 1984, 1985, 1987, and 1988. In contrast to Pacificslope Flycatchers, Hammond’s used nest trees that averaged two to three times taller; placed nests three times higher and farther from the tree bole; used only live trees; placed nests only on small- to medium-diameter branches; situated nests in areas with higher foliage cover; and favored nest placement on the northeast and southwest sides of trees. Attributes of nesting habitat also differed between species among different stand development stages. Hammond’s Flycatchers in old-growth and mature forests chose nest sites with more open canopy than that found at random sites. Pacific-slope Flycatchers in old-growth and mature forests nested at sites with a lower mid-canopy bole height. In young stands, Pacific-slope Flycatchers selected nest sites with large Douglas-firs and Pacific madrone (Arbutus menziesii) trees, higher shrub cover, and fewer medium-size Douglas-fir trees. Hammond’s Flycatchers were not found in younger stands. We speculate that if old-growth Douglas-fir/tanoak forests are greatly reduced or eliminated in northwestern California, the density of breeding Hammond’s Flycatcher will decrease substantially. However, Pacific-slope Flycatchers would probably be less affected by conversion of old-growth forests to younger-aged classes.

    Publication Notes

    • You may send email to psw_communications@fs.fed.us 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.

    Citation

    Sakai, H.F.; Noon, B.R. 1991. Nest site characteristics of Hammond's and Pacific-slope flycatchers in northwest California. Condor 93(3): 563-574.

    Keywords

    Hammond’s Flycatcher, Pacific-slope Flycatcher, Empidonax hammondii, E. difficilis, nest-site selection, Douglas-fir forest, northwestern California, old-growth forest

    Related Search


    XML: View XML
Show More
Show Fewer
Jump to Top of Page
https://www.fs.usda.gov/treesearch/pubs/3673