A variable circular-plot method for estimating bird numbers

Author:

Reynolds, R.T., Scott, J.M., Nussbaum, R.A.

Title:

A variable circular-plot method for estimating bird numbers

Periodical:

Condor

Year:

1980

Volume:

82

Pages:

309-313

Subject:

Birds counting

Summary:

This document describes the pros and cons to a variety of bird census techniques such as territorial or spot-mapping methods, a variable strip method, and a variable circular-plot census technique. When the objective is to estimate the number and species of birds in a community for energetic considerations, for calculating species diversity, or for elucidating the effects of habitat disturbances on bird populations, techniques that estimate the number of birds per area rather than relative abundance is desirable. Since existing methods require different amounts of effort and give results of differing accuracy, the choice of a suitable technique should be based on: the species of interest, the season of the year, time and personnel available, number and types of habitats from which a census would be taken, and on the accuracy of the density estimate that is required. The variable circular-plot census technique that is described in this paper gives estimates of birds per unit are during all seasons.

Label:

Birds - General

URL:

https://sora.unm.edu/node/103083

Collection:

Periodicals