Statewide

Indiana Reptiles and Amphibians by Month

Every reptile and amphibian with enough records anywhere in Indiana, counted from observations inside the state line. Seasons can differ a lot across the state, so for a closer match, pick your ecoregion on the Indiana page.

47 species1 venomous

Peak and shoulder ratings are rough guidance, not a schedule. Weather, elevation and the year can shift any species by weeks.

Rare and protected species are left off on purpose. Look, don't take, and never handle a venomous snake.

Species out in Indiana, by group and month

Group
Snakes		2	5	12	13	13	11	11	9	7	4
Lizards			1	3	3	3	3	3	3	1
Turtles		3	4	6	6	6	6	6	5	2	1
Frogs and Toads		8	10	12	12	11	11	10	10	9	4
Salamanders	2	9	11	13	11	10	3	4	5	6	3	2

Numbers = species active that month (at peak or just starting / winding down).

Keep Herp Calendar free

Hi, I'm Nick. I built Herp Calendar on my own and I keep it free, with no ads. If it has helped you find a herp this season, a small tip goes straight into the hosting and the data work. Only if you can spare it. Either way, I'm glad you're here.

Leave a tip

32 species at peak or shoulder in September

peak

Frogs and ToadsAmerican BullfrogLithobates catesbeianus

peak

Frogs and ToadsAmerican ToadAnaxyrus americanus

peak

SnakesDeKay's BrownsnakeStoreria dekayi

peak

SnakesEastern Hognose SnakeHeterodon platirhinos

peak

Frogs and ToadsGray TreefrogDryophytes versicolor

shoulder

Frogs and ToadsBlanchard's Cricket FrogAcris blanchardi

shoulder

SnakesCentral RatsnakePantherophis alleghaniensis

shoulder

LizardsCommon Five-lined SkinkPlestiodon fasciatus

shoulder

SnakesCommon Garter SnakeThamnophis sirtalis

shoulder

TurtlesCommon Snapping TurtleChelydra serpentina

shoulder

SnakesCommon WatersnakeNerodia sipedon

shoulder

LizardsEastern Fence LizardSceloporus undulatus

shoulder

SnakesEastern MilksnakeLampropeltis triangulum

shoulder

SalamandersEastern Red-backed SalamanderPlethodon cinereus

shoulder

SalamandersEastern Tiger SalamanderAmbystoma tigrinum

shoulder

Frogs and ToadsFowler's ToadAnaxyrus fowleri

shoulder

Frogs and ToadsGreen FrogLithobates clamitans

shoulder

SalamandersMarbled SalamanderAmbystoma opacum

shoulder

SnakesNorth American RacerColuber constrictor

shoulder

TurtlesNorthern Map TurtleGraptemys geographica

shoulder

SalamandersNorthern Slimy SalamanderPlethodon glutinosus

shoulder

TurtlesPainted TurtleChrysemys picta

shoulder

Frogs and ToadsPickerel FrogLithobates palustris

shoulder

TurtlesPond SliderTrachemys scripta

shoulder

SnakesRing-necked SnakeDiadophis punctatus

shoulder

SnakesRough GreensnakeOpheodrys aestivus

shoulder

LizardsSix-lined RacerunnerAspidoscelis sexlineatus

shoulder

Frogs and ToadsSouthern Leopard FrogLithobates sphenocephalus

shoulder

SalamandersSouthern Two-lined SalamanderEurycea cirrigera

shoulder

TurtlesSpiny SoftshellApalone spinifera

shoulder

Frogs and ToadsSpring PeeperPseudacris crucifer

shoulder

Frogs and ToadsWood FrogLithobates sylvaticus

About Indiana

When are reptiles and amphibians most active in Indiana?

May is the busiest month in Indiana, with 40 species at peak activity. At least half of the area's species are active from March through October.

What reptiles and amphibians live in Indiana?

47 species have enough iNaturalist records to show here: 13 salamanders, 13 snakes, 12 frogs and toads, 6 turtles, and 3 lizards. The most-reported are the American Toad, Eastern Red-backed Salamander, and Green Frog.

Are there venomous snakes in Indiana?

Yes. The Eastern Copperhead lives here. Don't handle them.

Where does this data come from?

Activity calendars are built from iNaturalist research-grade observations (downloaded through GBIF, September 2026), corrected for how many people are out observing each month. Rare and protected species are left off on purpose.