Download or read book Illinois Birds written by Jeffery W. Walk and published by . This book was released on 2010 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt: Illinois Birds: A Century of Change compares bird populations and landscapes in Illinois from the turn of the last century, the 1950s and the turn of this century. 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.