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Point counts of birds: what are we estimating?

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Citation

Point counts of birds: what are we estimating?; 1995; Federal Government Series; General Technical Re; PSW-149; Monitoring bird populations by point counts; Johnson, D. H.

Summary

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.

Contacts

Author :
D.H. Johnson
Publisher :
U.S. Forest Service

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Harvested on Wed Sep 14 04:15:27 MDT 2016 from MODS XML Service

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Type Scheme Key
local-index unknown 2000077
local-pk unknown 2000077
series unknown General Technical Report

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journalGeneral Technical Report
languageEnglish
citationTypeReport

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