Point counts of birds: what are we estimating?

General Technical Report PSW-GTR-149



Point counts of birds are made for many reasons, including estimating local densities, determining population trends, assessing habitat preferences, and exploiting the activities of recreational birdwatchers. Problems arise unless there is a clear understanding of what point counts mean in terms of actual populations of birds. Criteria for conducting point counts depend strongly on the purposes to which they will be put. This paper provides a simple mathematical conceptualization of point counts and illustrates graphically some of the influences on them.

Publication type Report
Publication Subtype Federal Government Series
Title Point counts of birds: what are we estimating?
Series title General Technical Report
Series number PSW-GTR-149
Year Published 1995
Language English
Publisher U.S. Forest Service
Contributing office(s) Northern Prairie Wildlife Research Center
Description 7 p.
Larger Work Type Report
Larger Work Subtype Federal Government Series
Larger Work Title Monitoring bird populations by point counts
First page 117
Last page 123
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