Reptiles & Amphibians of Illinois
The reptiles & amphibians most often spotted in Illinois, ranked by recent research-grade observations.
95,062
recent observations
50
species listed
50
reptiles & amphibians
Naturalists have logged 95,062 research-grade observations across the 50 most-recorded species in Illinois. The most frequently seen is the American Toad, with 8,587 recorded sightings.
Most-observed reptiles & amphibians in Illinois
American Toad
Anaxyrus americanus
8,587 observations
Pond Slider
Trachemys scripta
5,937 observations
Painted Turtle
Chrysemys picta
5,701 observations
American Bullfrog
Lithobates catesbeianus
5,634 observations
Common Garter Snake
Thamnophis sirtalis
5,316 observations
Common Watersnake
Nerodia sipedon
4,306 observations
DeKay's Brownsnake
Storeria dekayi
4,271 observations
Blanchard's Cricket Frog
Acris blanchardi
4,190 observations
Common Snapping Turtle
Chelydra serpentina
3,857 observations
Green Frog
Lithobates clamitans
3,244 observations
Three-toed Box Turtle
Terrapene triunguis
3,222 observations
Common Box Turtle
Terrapene carolina
2,883 observations
Northern Cottonmouth
Agkistrodon piscivorus
2,826 observations
Plains Garter Snake
Thamnophis radix
2,364 observations
Fowler's Toad
Anaxyrus fowleri
2,057 observations
Northern Leopard Frog
Lithobates pipiens
2,015 observations
Southern Leopard Frog
Lithobates sphenocephalus
1,905 observations
Central Ratsnake
Pantherophis alleghaniensis
1,618 observations
North American Racer
Coluber constrictor
1,223 observations
Prairie Lizard
Sceloporus consobrinus
1,206 observations
Spring Peeper
Pseudacris crucifer
1,158 observations
Western Ratsnake
Pantherophis obsoletus
1,116 observations
Boreal Chorus Frog
Pseudacris maculata
1,115 observations
Eastern Newt
Notophthalmus viridescens
1,110 observations
Spiny Softshell
Apalone spinifera
1,109 observations
Eastern Foxsnake
Pantherophis vulpinus
1,087 observations
Ring-necked Snake
Diadophis punctatus
1,065 observations
Plain-bellied Watersnake
Nerodia erythrogaster
962 observations
Common Five-lined Skink
Plestiodon fasciatus
924 observations
Spotted Salamander
Ambystoma maculatum
897 observations
Cave Salamander
Eurycea lucifuga
837 observations
Green Treefrog
Dryophytes cinereus
817 observations · iNaturalist
Gray Treefrog
Dryophytes versicolor
785 observations · iNaturalist
Eastern Copperhead
Agkistrodon contortrix
774 observations
Eastern Milksnake
Lampropeltis triangulum
765 observations
Rough Greensnake
Opheodrys aestivus
763 observations
Small-mouthed Salamander
Ambystoma texanum
759 observations
Blue-spotted Salamander
Ambystoma laterale
702 observations
Northern Slimy Salamander
Plethodon glutinosus
637 observations
Eastern Fence Lizard
Sceloporus undulatus
598 observations
Broad-headed Skink
Plestiodon laticeps
561 observations
Red-bellied Snake
Storeria occipitomaculata
530 observations
Marbled Salamander
Ambystoma opacum
493 observations
Little Brown Skink
Scincella lateralis
475 observations
Eastern Red-backed Salamander
Plethodon cinereus
457 observations
Prairie Kingsnake
Lampropeltis calligaster
452 observations
Western Ribbon Snake
Thamnophis proximus
451 observations
Northern Map Turtle
Graptemys geographica
443 observations
Timber Rattlesnake
Crotalus horridus
438 observations
Western Slimy Salamander
Plethodon albagula
420 observations
Reptiles & Amphibians in nearby places
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