The 2011 Gull Frolic will be held on February 19, 2011. To register, please download and fill out the 2011 Gull Frolic Registration Form (PDF).
The 2010 Listers Corner Blank Form (PDF) is now available.
Interested in monitoring birds in the Chicago area? See The Bird Conservation Network (BCN) Census page to learn how.
The Birds of Illinois series has been updated to reflect the recent taxonomic and nomenclatural changes made by the American Ornithologists' Union.
The 2010 IOS Grant Awards page is now up.
The Site Map contains brief descriptions of and links to each main document on this Web site.