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Bird Ecology and ConservationA Handbook of Techniques$
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William J. Sutherland, Ian Newton, and Rhys Green

Print publication date: 2004

Print ISBN-13: 9780198520863

Published to Oxford Scholarship Online: September 2007

DOI: 10.1093/acprof:oso/9780198520863.001.0001

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Bird census and survey techniques

Bird census and survey techniques

(p.17) 2 Bird census and survey techniques
Bird Ecology and Conservation

Richard D. Gregory

David W. Gibbons

Paul F. Donald

Oxford University Press

This chapter focuses on field survey and census techniques, the difference between one-off surveys and long-term year-on-year monitoring of birds in particular study areas. It is concerned with estimating population sizes and densities, or indices of densities for particular species. It lists the key decisions that need to be made before a project is started, and discusses sampling strategies, levels of accuracy and precision, and field methods, including the pros and cons of mapping methods, line transects, point transects, and other counting procedures. It also discusses detection probabilities, and the problems presented by colonies, flocks, and passing migrants. It deals with capture techniques, tape playback, and other vocal methods, including the identification of individuals from their calls.

Keywords:   sampling, count, methods, monitoring, transect, detection, tape playback

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