The Calumet region of Chicago’s southeast side was once a biologically significant treasure comprised of over 22,000 acres of wetland, prairie and oak woods. Only a small amount of its former glory persists, but among the better-preserved examples is Eggers Grove. The 250 acres of primarily marsh and oaks support a host of migrants (from ducks to warblers and sparrows), while such uncommon species as Virginia Rail and Yellow-headed Blackbird have nested here.