Reptiles & Amphibians of Illinois
The reptiles & amphibians most often spotted in Illinois, ranked by recent research-grade observations.
92,827
recent observations
50
species listed
50
reptiles & amphibians
Naturalists have logged 92,827 research-grade observations across the 50 most-recorded species in Illinois. The most frequently seen is the American Toad, with 8,370 recorded sightings.
Most-observed reptiles & amphibians in Illinois
American Toad
Anaxyrus americanus
8,370 observations
Pond Slider
Trachemys scripta
5,789 observations
Painted Turtle
Chrysemys picta
5,548 observations
American Bullfrog
Lithobates catesbeianus
5,465 observations
Common Garter Snake
Thamnophis sirtalis
5,202 observations
Common Watersnake
Nerodia sipedon
4,202 observations
DeKay's Brownsnake
Storeria dekayi
4,173 observations
Blanchard's Cricket Frog
Acris blanchardi
4,058 observations · iNaturalist
Common Snapping Turtle
Chelydra serpentina
3,761 observations
Green Frog
Lithobates clamitans
3,169 observations
Three-toed Box Turtle
Terrapene triunguis
3,154 observations · iNaturalist
Common Box Turtle
Terrapene carolina
2,814 observations
Northern Cottonmouth
Agkistrodon piscivorus
2,791 observations
Plains Garter Snake
Thamnophis radix
2,315 observations
Fowler's Toad
Anaxyrus fowleri
2,007 observations
Northern Leopard Frog
Lithobates pipiens
1,931 observations
Southern Leopard Frog
Lithobates sphenocephalus
1,856 observations
Central Ratsnake
Pantherophis alleghaniensis
1,583 observations
North American Racer
Coluber constrictor
1,201 observations
Prairie Lizard
Sceloporus consobrinus
1,158 observations · iNaturalist
Spring Peeper
Pseudacris crucifer
1,144 observations
Eastern Newt
Notophthalmus viridescens
1,099 observations
Boreal Chorus Frog
Pseudacris maculata
1,092 observations
Western Ratsnake
Pantherophis obsoletus
1,088 observations
Spiny Softshell
Apalone spinifera
1,080 observations
Ring-necked Snake
Diadophis punctatus
1,054 observations
Eastern Foxsnake
Pantherophis vulpinus
1,050 observations · iNaturalist
Plain-bellied Watersnake
Nerodia erythrogaster
960 observations
Common Five-lined Skink
Plestiodon fasciatus
899 observations
Spotted Salamander
Ambystoma maculatum
892 observations
Cave Salamander
Eurycea lucifuga
819 observations
Green Treefrog
Dryophytes cinereus
790 observations · iNaturalist
Gray Treefrog
Dryophytes versicolor
787 observations · iNaturalist
Small-mouthed Salamander
Ambystoma texanum
754 observations · iNaturalist
Eastern Copperhead
Agkistrodon contortrix
753 observations
Rough Greensnake
Opheodrys aestivus
747 observations
Eastern Milksnake
Lampropeltis triangulum
746 observations
Blue-spotted Salamander
Ambystoma laterale
696 observations
Northern Slimy Salamander
Plethodon glutinosus
627 observations
Eastern Fence Lizard
Sceloporus undulatus
583 observations
Broad-headed Skink
Plestiodon laticeps
554 observations
Red-bellied Snake
Storeria occipitomaculata
514 observations · iNaturalist
Marbled Salamander
Ambystoma opacum
490 observations
Eastern Red-backed Salamander
Plethodon cinereus
457 observations
Little Brown Skink
Scincella lateralis
454 observations
Western Ribbon Snake
Thamnophis proximus
449 observations
Prairie Kingsnake
Lampropeltis calligaster
439 observations · iNaturalist
Northern Map Turtle
Graptemys geographica
424 observations
Timber Rattlesnake
Crotalus horridus
422 observations
Western Slimy Salamander
Plethodon albagula
417 observations · iNaturalist
Reptiles & Amphibians in nearby places
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