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Reappraisal of the Winter Bird-Population Study technique

By:
Edited by:
C. John Ralph, J. Michael Scott

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Abstract

Standardized morning and afternoon counts were conducted in two deciduous forest plots during seven winters. Morning counts yielded more species than afternoon counts, as well as higher counts of most species. A minimum of eight visits is recommended. Six visits yielded 2% to 5% fewer species, depending on the size and bird population of the study plot. Cumulative means for individual species varied erratically for most species when the number of visits was less than seven.

Additional Publication Details

Publication type:
Book chapter
Publication Subtype:
Book Chapter
Title:
Reappraisal of the Winter Bird-Population Study technique
Year Published:
1981
Language:
English
Contributing office(s):
Patuxent Wildlife Research Center
Description:
x, 630
Larger Work Type:
Book
Larger Work Subtype:
Other Government Series
First page:
52
Last page:
57