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INHS Bulletin vol.28:3PDF


Title:A Comparative Study of Bird Populations in Illinois, 1906-1909 and 1956-1958
Author(s):Graber, Richard Rex; Graber, Jean Weber
Contributor(s):Biodiversity Heritage Library
Subject(s):Bird Populations
Comparative Study
Abstract:On August 29, 1906, Alfred O. Gross and Howard A. Ray, working for the Illinois State Laboratory of Natural History (a parent organization of the Illinois Natural History Survey) under the direction of Stephen A. Forbes, began a series of statewide, cross-country censuses of birds in Illinois. These censuses were continued at intervals until September, 1909, and the data collected were published in a series of papers (Forbes 1907, 1908, 1913; Forbes & Gross 1921, 1922, 1923) that provided a quantitative record of the Illinois bird populations of that period and a potential basis for evaluating the adjustment of bird populations to a changing environment. In 1956—1958, we conducted statewide censuses similar to those of the 1906-1909 survey. In this paper we present an analysis of our field data and compare these data with those from the first survey.
Issue Date:1963-10
Publisher:Champaign : Illinois Natural History Survey
Series/Report:Illinois Natural History Survey Bulletin; v. 028, no. 03
Publication Status:published or submitted for publication
Peer Reviewed:is peer reviewed
Rights Information:Copyright 2009 University of Illinois Board of Trustees. All rights reserved.
Date Available in IDEALS:2013-05-24
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