Loading species data...
Fetching observations
Painted Turtle
Chrysemys picta
4,464 observations
Pond Slider
Trachemys scripta
4,056 observations
Common Garter Snake
Thamnophis sirtalis
3,908 observations
Common Watersnake
Nerodia sipedon
2,702 observations
Northern Cottonmouth
Agkistrodon piscivorus
2,680 observations
DeKay's Brownsnake
Storeria dekayi
2,670 observations
Common Snapping Turtle
Chelydra serpentina
2,647 observations
Common Box Turtle
Terrapene carolina
2,393 observations
Plains Garter Snake
Thamnophis radix
2,082 observations
Gray Ratsnake
Pantherophis spiloides
1,352 observations
Eastern Foxsnake
Pantherophis vulpinus
912 observations
Plain-bellied Watersnake
Nerodia erythrogaster
798 observations
North American Racer
Coluber constrictor
792 observations
Spiny Softshell
Apalone spinifera
758 observations
Rough Greensnake
Opheodrys aestivus
550 observations
Eastern Milksnake
Lampropeltis triangulum
528 observations
Eastern Fence Lizard
Sceloporus undulatus
515 observations
Common Five-lined Skink
Plestiodon fasciatus
447 observations
Ring-necked Snake
Diadophis punctatus
430 observations
Eastern Copperhead
Agkistrodon contortrix
392 observations
Black Kingsnake
Lampropeltis nigra
336 observations
Western Ribbon Snake
Thamnophis proximus
315 observations
Red-bellied Snake
Storeria occipitomaculata
296 observations
Prairie Kingsnake
Lampropeltis calligaster
294 observations
Timber Rattlesnake
Crotalus horridus
278 observations
Eastern Musk Turtle
Sternotherus odoratus
257 observations
Little Brown Skink
Scincella lateralis
224 observations
Northern Map Turtle
Graptemys geographica
211 observations
Six-lined Racerunner
Aspidoscelis sexlineatus
193 observations
Eastern Hognose Snake
Heterodon platirhinos
184 observations
Gopher Snake
Pituophis catenifer
173 observations
Queensnake
Regina septemvittata
169 observations
Broad-headed Skink
Plestiodon laticeps
167 observations
Smooth Greensnake
Opheodrys vernalis
163 observations
Diamondback Watersnake
Nerodia rhombifer
152 observations
Mississippi Green Watersnake
Nerodia cyclopion
149 observations
Ornate Box Turtle
Terrapene ornata
149 observations
Common Wormsnake
Carphophis amoenus
142 observations
Smooth Earthsnake
Virginia valeriae
120 observations
False Map Turtle
Graptemys pseudogeographica
103 observations
Blanding's Turtle
Emydoidea blandingii
91 observations
Slender Glass Lizard
Ophisaurus attenuatus
76 observations
Mudsnake
Farancia abacura
48 observations
River Cooter
Pseudemys concinna
41 observations
Common Ribbon Snake
Thamnophis saurita
41 observations
Ouachita Map Turtle
Graptemys ouachitensis
40 observations
Mediterranean House Gecko
Hemidactylus turcicus
30 observations
Graham's Crawfish Snake
Regina grahamii
29 observations
Brown Anole
Anolis sagrei
26 observations
Plains Hognose Snake
Heterodon nasicus
22 observations
Frequently Asked Questions
- The 10 most common reptiles in Illinois are:
- Painted Turtle (Chrysemys picta)
- Pond Slider (Trachemys scripta)
- Common Garter Snake (Thamnophis sirtalis)
- Common Watersnake (Nerodia sipedon)
- Northern Cottonmouth (Agkistrodon piscivorus)
- DeKay's Brownsnake (Storeria dekayi)
- Common Snapping Turtle (Chelydra serpentina)
- Common Box Turtle (Terrapene carolina)
- Plains Garter Snake (Thamnophis radix)
- Gray Ratsnake (Pantherophis spiloides)
- The most observed reptile in Illinois is Painted Turtle (Chrysemys picta), with 4,464 recorded observations.