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. Using the spatial filtering process to evaluate the nonbreeding range of Rusty Blackbird Euphagus carolinus

    Share via EmailShare on FacebookShare on LinkedInShare on Twitter
    Dislike this pubLike this pub
    Author(s): Paul Hamel; Esra Ozdenrol
    Date: 2008
    Source: In: Rich, Terry; Arizmendi, Coro; Thompson, Craig; Demarest, Dean eds. Tundra to Tropics: Proceedings of the 4th International Partners in Flight Conference, 13-16 Feb 2008. McAllen, Texas. p. 334-340.
    Publication Series: Scientific Journal (JRNL)
    PDF: Download Publication  (237.13 KB)

    Description

    During the nonbreeding period, Rusty Blackbird (Euphagus carolinus) occurs predominantly in forested wetland habitats in the southeastern U.S. We used spatial filtering of Christmas Bird Count data to identify areas within the nonbreeding range where the species occurs at higher than expected probability. Spatial filtering is an epidemiological modeling process developed to identify concentrations of cases of a phenomenon, and can be tested for statistical significance using Monte Carlo simulations against a null hypothesis that assumes a uniform distribution of the phenomena. Using separate data sets in which cases were identified as “Occurrence of at least 1 Rusty Blackbird” or as “Occurrence of at least 10 Rusty Blackbirds”, we developed annual probability estimates of observed occurrence vs null simulations of the existing cases distributed at random among locations at which Christmas Bird Counts were conducted. We were thus able to identify consistent concentrations of Rusty Blackbird occurrence in the Mississippi Alluvial Valley and in the southeastern Coastal Plain of the Carolinas and Georgia. We were also able to identify and eliminate some of the noise in the data that arises from convenience sampling method used in the Christmas Bird Count. Spatial filtering is a method of considerable utility for investigating spatial distribution of birds and comparing the observed distribution with a null expectation.

    Publication Notes

    • You may send email to pubrequest@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

    Hamel, P.B. and E. Ozdenerol. 2009. Using the spatial filtering process to evaluate the nonbreeding range of Rusty Blackbird. In: T. Rich, C. Arizmendi, D. Demarest, and C. Thompson, eds., Tundra to Tropics: Connecting Birds, Habitats and People. Proceedings of the 4th International Partners in Flight Conference, McAllen, Texas, 13-16 Feb 2008. p. 334-340.

    Keywords

    bird distribution mapping and analysis, Christmas bird count, Rusty Blackbird spatial filtering

    Related Search

    XML: View XML
Show More
Show Fewer
Jump to Top of Page
https://www.fs.usda.gov/treesearch/pubs/36484