A Comparative Study of Bird Populations in Illinois, 1906-1909 and 1956-1958
Graber, Richard Rex; Graber, Jean Weber
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https://hdl.handle.net/2142/44083
Description
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
Issue Date
1963-10
Keyword(s)
Bird Populations
Comparative Study
Illinois
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.
Publisher
Champaign : Illinois Natural History Survey
Series/Report Name or Number
Illinois Natural History Survey Bulletin; v. 028, no. 03
ISSN
0073-4918
Type of Resource
text
Language
en
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http://hdl.handle.net/2142/44083
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https://biodiversitylibrary.org/page/14774253
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