List of snakes of Illinois

This is a list of snake species known to be found in the U.S. state of Illinois. Concerns and listed statuses come from the Illinois Endangered Species Protection Board's February 2011 Checklist of endangered and threatened animals and plants of Illinois and the Illinois Natural History Survey's website.

Image Scientific name Common name Family Venomous Conservationconcern Agkistrodon contortrix Eastern copperhead Viperidae Yes Locally abundant Agkistrodon piscivorus Northern cottonmouthWater moccasin Viperidae Yes Locally abundant Carphophis amoenus helenae Midwestern worm snake Colubridae No Locally abundant Carphophis vermis Midwestern worm snake Colubridae No Locally abundant Clonophis kirtlandii Kirtland's snake Colubridae No State Threatened Cemophora coccinea copei Northern scarlet snake Colubridae No Current existence in IL uncertain. Single specimen vouchered in 1942. Coluber constrictor foxii Blue racer Colubridae No Coluber constrictor priapus Southern black racer Colubridae No Locally common Crotalus horridus Timber rattlesnakeCanebrake rattlesnake Viperidae Yes State Threatened Diadophis punctatus arnyi Prairie ringneck snake Colubridae No Locally abundant Diadophis punctatus edwardsii Northern ringneck snake Colubridae No Locally abundant Diadophis punctatus stictogenys Mississippi ringneck snake Colubridae No Locally abundant Farancia abacura reinwardtii Western mud snake Colubridae No Rarely seen Heterodon nasicus gloydi Dusty hognose snake Colubridae No Heterodon nasicus nasicus Plains hognose snake Colubridae No State Threatened Heterodon platirhinos Eastern hognose snake Colubridae No Locally common Lampropeltis calligaster calligaster Prairie kingsnake Colubridae No Locally common Lampropeltis getula holbrooki Speckled kingsnake Colubridae No Locally common Lampropeltis getula niger Black kingsnake Colubridae No Locally common Lampropeltis triangulum triangulum Eastern milk snake Colubridae No Not commonly seen Lampropeltis triangulum syspila Red milk snake Colubridae No Not commonly seen Masticophis flagellum flagellum Eastern coachwhip Colubridae No State Endangered Nerodia cyclopion Mississippi green water snake Colubridae No State Threatened Nerodia erythrogaster flavigaster Yellowbelly water snake Colubridae No Nerodia erythrogaster neglecta Copperbelly water snake Colubridae No "protected as though it were listed in Illinois" Nerodia fasciata confluens Broad-banded water snake Colubridae No State Endangered Nerodia rhombifer Diamondback water snake Colubridae No Locally common Nerodia sipedon pleuralis Midland water snake Colubridae No Nerodia sipedon sipedon Northern water snake Colubridae No Abundant Opheodrys aestivus Rough green snake Colubridae No Locally abundant Opheodrys vernalis Smooth green snake Colubridae No Not abundant Pantherophis emoryi Great Plains ratsnake Colubridae No State Endangered Pantherophis spiloides Gray ratsnake Colubridae No Locally common Pantherophis vulpina Western fox snake Colubridae No Locally common Pituophis catenifer sayi GophersnakeBullsnake Colubridae No Locally common Regina grahamii Graham's crayfish snake Colubridae No Widespread but uncommon Regina septemvittata Queen snake Colubridae No Locally abundant Sistrurus catenatus catenatus Eastern massasauga Viperidae Yes Storeria dekayi wrightorum Midland brown snakeDe Kay's brown snake Colubridae No Common Storeria occipitomaculata occipitomaculata Northern redbelly snake Colubridae No Locally abundant Tantilla gracilis Flat-headed snake Colubridae No State Threatened Thamnophis proximus proximus Western ribbon snake Colubridae No Locally common Thamnophis radix Plains garter snake Colubridae No Common in north half of state Thamnophis saurita saurita Eastern ribbon snake Colubridae No State Threatened Thamnophis saurita septentrionalis Northern ribbon snake Colubridae No Thamnophis sirtalis semifasciatus Chicago garter snake Colubridae No Thamnophis sirtalis sirtalis Common garter snake Colubridae No Common Tropidoclonion lineatum lineatum Northern lined snake Colubridae No State Threatened Virginia valeriae elegans Western earth snake Colubridae No

References