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Surveys and related works, in chronological order
Illinois Birds: A Century of Change by Illinois Natural History Survey Special Publication no. 31.
Compares bird populations and landscapes in Illinois from the turn of the last century, the 1950s (Graber and Graber, 1963) and the turn of this century (Forbes & Gross, 1922). Surveys in the 2000s turned up 26 species not found 50 or 100 years ago, including wood ducks, house finches, and collared doves. While only one species has been eliminated from Illinois, there are several species that are declining.
Publication Date: 2010
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