American Bird Conservancy Audubon of the Chicago Region American Birding Association American Ornithologist's Union Association of Field Ornithologists Bird Conservation Network Chicago Audubon Society Chicago Ornithological Society Flint Creek Wildlife Illinois Audubon Society Illinois Ornithological Society National Audubon Society National Audubon Society, Chicago Wilderness Field Office Chicago Department of Environment Chicago Park District Chicago Public Library Illinois Department of Natural Resources Department of the Interior U.S. Fish and Wildlife Service: U.S.G.S., Patuxent Wildlife Research Center: Birder.com Birding.com Birdwatching.com Birding/Wild Birds Birdsource National Bird-Feeding Society Chicago Botanic Garden Cornell Laboratory of Ornighology eNature.com Field Museum of Natural History GORP Birding Page Illinois Bird Page (pictures of rare Illinois birds) Illinois & Chicago Net-Birding Illinois Hotspots International Crane Foundation Journey North National Fish & Wildlife Foundation National Geographic, Chicago-Area Bird Watching North American Rare Bird Alert Partners in Flight The Peggy Notebaert Nature Museum Peterson Online The Purple Martin Society Raptor Research Foundation Satellite Tracking Threatened Species Wildbirds.com