Rock Cut State Park At over 3,000 acres, this is the biggest birding spot and also one of the best. In the spring and summer months there are many warblers, vireos, flycatchers, tanagers, orioles, and more. Look especially for Cerulean and Yellow-throated Warblers, two nesting birds in the park. Full article on Rock Cut State Park

• Birdfreak: The Bird Conservation Blog
• North Central Illinois Ornithological Society (NCIOS)