Month by month

What Reptiles and Amphibians Are Out in Missouri in September

47 reptiles and amphibians are active in Missouri in September, and 34 are at peak. Peak species include the Three-toed Box Turtle, Blanchard's Cricket Frog, American Toad, and Western Ratsnake.

Counted from iNaturalist research-grade observations recorded inside Missouri. Seasons shift across the state, so for a closer match, pick your ecoregion.

Full 12-month Missouri calendar Pick your ecoregion

Species out across Missouri, by group and month

Group
Snakes	1	5	22	23	24	20	17	19	21	20	14	3
Lizards		3	4	6	6	6	6	5	3	3	2
Turtles	1	3	5	8	10	10	9	9	8	6	4	1
Frogs and Toads	2	7	10	10	9	10	11	9	10	10	6	2
Salamanders	1	7	9	9	6	4	4	4	5	6	4

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

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At peak in September 34

Snakes

peak

SnakesCommon WatersnakeNerodia sipedon

peak

SnakesDiamondback WatersnakeNerodia rhombifer

peak

SnakesEastern CopperheadAgkistrodon contortrix

venomous

peak

SnakesEastern Hognose SnakeHeterodon platirhinos

peak

SnakesNorth American RacerColuber constrictor

peak

SnakesNorthern CottonmouthAgkistrodon piscivorus

venomous

peak

SnakesPlain-bellied WatersnakeNerodia erythrogaster

peak

SnakesPrairie KingsnakeLampropeltis calligaster

peak

SnakesPygmy RattlesnakeSistrurus miliarius

venomous

peak

SnakesRed-bellied SnakeStoreria occipitomaculata

peak

SnakesRing-necked SnakeDiadophis punctatus

peak

SnakesRough GreensnakeOpheodrys aestivus

peak

SnakesSmooth EarthsnakeVirginia valeriae

peak

SnakesTimber RattlesnakeCrotalus horridus

venomous

peak

SnakesWestern RatsnakePantherophis obsoletus

peak

SnakesWestern Ribbon SnakeThamnophis proximus

Lizards

peak

LizardsLittle Brown SkinkScincella lateralis

peak

LizardsPrairie LizardSceloporus consobrinus

Turtles

peak

TurtlesEastern Musk TurtleSternotherus odoratus

peak

TurtlesNorthern Map TurtleGraptemys geographica

peak

TurtlesSpiny SoftshellApalone spinifera

peak

TurtlesThree-toed Box TurtleTerrapene triunguis

Frogs and Toads

peak

Frogs and ToadsAmerican BullfrogLithobates catesbeianus

peak

Frogs and ToadsAmerican ToadAnaxyrus americanus

peak

Frogs and ToadsBlanchard's Cricket FrogAcris blanchardi

peak

Frogs and ToadsFowler's ToadAnaxyrus fowleri

peak

Frogs and ToadsGreen FrogLithobates clamitans

peak

Frogs and ToadsGreen TreefrogDryophytes cinereus

peak

Frogs and ToadsPickerel FrogLithobates palustris

peak

Frogs and ToadsPlains Leopard FrogLithobates blairi

peak

Frogs and ToadsSouthern Leopard FrogLithobates sphenocephalus

Salamanders

peak

SalamandersCave SalamanderEurycea lucifuga

peak

SalamandersDark-sided SalamanderEurycea melanopleura

peak

SalamandersMarbled SalamanderAmbystoma opacum

Shoulder season in September 13

Snakes

shoulder

SnakesCommon Garter SnakeThamnophis sirtalis

shoulder

SnakesDeKay's BrownsnakeStoreria dekayi

shoulder

SnakesEastern MilksnakeLampropeltis triangulum

shoulder

SnakesLined SnakeTropidoclonion lineatum

shoulder

SnakesSpeckled KingsnakeLampropeltis holbrooki

Lizards

shoulder

LizardsCommon Five-lined SkinkPlestiodon fasciatus

Turtles

shoulder

TurtlesCommon Snapping TurtleChelydra serpentina

shoulder

TurtlesOrnate Box TurtleTerrapene ornata

shoulder

TurtlesPainted TurtleChrysemys picta

shoulder

TurtlesPond SliderTrachemys scripta

Frogs and Toads

shoulder

Frogs and ToadsGray TreefrogDryophytes versicolor

Salamanders

shoulder

SalamandersEastern NewtNotophthalmus viridescens

shoulder

SalamandersWestern Slimy SalamanderPlethodon albagula

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.

Missouri in September

What reptiles and amphibians are out in Missouri in September?

47 reptiles and amphibians are active in Missouri in September, and 34 are at peak. Peak species include the Three-toed Box Turtle, Blanchard's Cricket Frog, American Toad, and Western Ratsnake.

Are venomous snakes active in Missouri in September?

Yes. The Eastern Copperhead, Northern Cottonmouth, Timber Rattlesnake, and Pygmy Rattlesnake can be active in September. Watch where you step and don't handle them.