Laona Heights Sugar River Colored Sands Sugar River Two Rivers Ferguson Hartley Memorial Trask Bridge Four Lakes Pecatonica River Pecatonica Wetlands Crooked River Grove Creek Seward Bluffs Klehm Forest Preserve Severson Dells Fuller Memorial Cedar Cliff Indian Hill Hinchliff Memorial Kilbuck Bluffs Trailside Kishwaukee Gorge South Kishwaukee Gorge North Rockford Rotary Kishwaukee River Oak Ridge Blackhawk Springs Deer Run Espenscheid Memorial McKiski County Line Kieselburg Roland Olson Stone Bridge Clayton Andrews Ledges Hononegah J. Norman Jensen Millrace Isle Macktown Atwood Homestead Forest Preserve Headquarters

Song Birds

Excellent data on breeding and migrating song birds has been collected since 1976 at Sand Bluff Bird Observatory in Colored Sands Forest Preserve. Winnebago County’s location makes it highly valuable to migrating and breeding songbirds. 100+ species of song birds use the Rock River basin as a migratory flyway. Because of the intensive agricultural land use in Illinois and Wisconsin and lost natural habitat, the Rock River’s riparian corridor is considered a critical oasis for resting and feeding migratory birds.

Breeding Songbirds

Recent data have shown increased populations of the Blue-gray Gnatcatcher (Polioptila caerulea), Field Sparrow (Spizella pusilla), Bobolink (Dolichonyx oryzivorus), Eastern Towhee (Pipilo erythrophthalmus) and Henslow’s Sparrow (Ammodramus henslowii). Sand Bluff Bird Observatory provides important statistics on population trends, which the nationwide Bird Monitoring Network integrates into region wide data.