In 2003, I began a winter bird survey at Sand Prairie-Scrub Oak Nature Preserve in Mason County, Illinois. The purpose of this survey was to collect information on overwintering red-headed woodpeckers for Audubon's Important Bird Areas program in Illinois. Other than 2008, I have continued to do these counts at least once every winter season. Results of the first summary, called "The Missing Red-headed Woodpeckers of Sand Prairie-Scrub Oak Nature Preserve," were published here on this blog and in the Summer 2010 issue of Illinois Audubon magazine. I posted the first update to this survey on this blog on June 1, 2011. Here is another update.
Click on image to enlarge.
Other data from the site are at www.ebird.org.
For those interested in reading more about red-headed woodpeckers and Sand Praire-Scrub Oak Nature Preserve, please download Chapter 13 ( Download Side Channels Chapter 13), Dead Trees, Distrubance, and Illinois' Red-headed Woodpeckers, from my book Side Channels.
To purchase a copy of Side Channels, please go to Amazon or Barnes and Noble.