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    Author(s): Robert G. Hooper; Lawrence J. Niles; Richard F. Harlow; Gene W. Wood
    Date: 1982
    Source: The Auk
    Publication Series: Scientific Journal (JRNL)
    Station: Southern Research Station
    PDF: Download Publication  (497.0 KB)

    Description

    Total observed ranges of 24 groups of Red-cockaded Woodpeckers (Picoides borealis) varied from 34 to 225 ha and averaged 86.9 ha. Groups defended portions of these ranges from adjacent groups year-round. Home ranges were derived from total observed ranges by subtracting extraterritorial areas and areas receiving limited use. The percentage of year-round home-range boundaries determined by intergroup conflicts varied from 0% to 54% and averaged 23.6%. Year-round home ranges averaged 70.3 ha and varied from 30 to 195 ha. The portion of year-round home ranges used in all sampling periods varied from 15% to 65% and averaged 30.5%. The amount of potential foraging habitat per group for all groups within 2,000 m of a study group's colony, a measure of population density relative to available habitat, accounted for 70% of the variation in size of year-round home ranges (P < 0.0001). Various measures of group size and habitat quality were weakly related to size of year-round home ranges. Measures of group size and population density together accounted for 80% of the variation in size of year-round home ranges.

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    Citation

    Hooper, Robert G.; Niles, Lawrence J.; Harlow, Richard F.; Wood, Gene W. 1982.  Home ranges of Red-Cockaded Woodpeckers in coastal South Carolina. The Auk. 99(4): 675-682.

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