U.S. Listed Birds ^
GL&BR --- T --- Eagle, bald * (Haliaeetus leucocephalus)
GL&BR --- E --- Plover, piping * (Charadrius melodus)
GL&BR --- T --- Plover, piping * (Charadrius melodus)
GL&BR --- E --- Tern, least * (Sterna antillarum)
GL&BR --- E --- Warbler, Kirtland's * (Dendroica kirtlandii)

U.S. Listed Reptiles ^
GL&BR --- T --- Snake, copperbelly water (northern population) * (Nerodia erythrogaster neglecta)

U.S. Listed Fishes ^
GL&BR --- T --- Darter, Niangua * (Etheostoma nianguae)
GL&BR --- E --- Madtom, Scioto * (Noturus trautmani)

U.S. Listed Clams ^
GL&BR --- E --- Catspaw, white (pearlymussel) * (Epioblasma obliquata perobliqua (=sulcata delicata))
GL&BR --- E --- Higgins eye (pearlymussel) * (Lampsilis higginsii)
GL&BR --- E --- Mapleleaf, winged (mussel) * (Quadrula fragosa)
GL&BR --- E --- Pearlymussel, Curtis * (Epioblasma (=Dysnomia) florentina curtisii)

U.S. Listed Snails ^
GL&BR --- E --- Snail, Iowa Pleistocene * (Discus macclintocki)

U.S. Listed Insects ^
GL&BR --- E --- Beetle, Hungerford's crawling water * (Brychius hungerfordi)
GL&BR --- E --- Butterfly, Karner blue * (Lycaeides melissa samuelis)
GL&BR --- E --- Butterfly, Mitchell's satyr * (Neonympha mitchellii mitchellii)
GL&BR --- E --- Dragonfly, Hine's emerald * (Somatochlora hineana)

U.S. Listed Crustaceans ^
GL&BR --- E --- Amphipod, Illinois cave * (Gammarus acherondytes)

U.S. Listed Flowering Plants ^
GL&BR --- T --- Northern wild monkshood * (Aconitum noveboracense)
GL&BR --- T --- Mead's milkweed * (Asclepias meadii)
GL&BR --- T --- Decurrent false aster * (Boltonia decurrens)
GL&BR --- T --- Pitcher's thistle * (Cirsium pitcheri)
GL&BR --- E --- Minnesota dwarf trout lily * (Erythronium propullans)
GL&BR --- T --- Lakeside daisy * (Hymenoxys herbacea)
GL&BR --- T --- Dwarf lake iris * (Iris lacustris)
GL&BR --- T --- Prairie bush-clover * (Lespedeza leptostachya)
GL&BR --- E --- Missouri bladderpod * (Lesquerella filiformis)
GL&BR --- E --- Michigan monkey-flower * (Mimulus glabratus var. michiganensis)
GL&BR --- T --- Fassett's locoweed (Oxytropis campestris var. chartacea)
GL&BR --- T --- Eastern prairie fringed orchid (Platanthera leucophaea)
GL&BR --- T --- Western prairie fringed orchid * (Platanthera praeclara)
GL&BR --- T --- Leedy's roseroot * (Sedum integrifolium ssp. leedyi)
GL&BR --- T --- Houghton's goldenrod * (Solidago houghtonii)
GL&BR --- E --- Running buffalo clover * (Trifolium stoloniferum)
 

While this is just a long list, the USFW has more details on many of the species listed here, and I reccommend you check them out.