Ecoregion
High Plains Reptiles and Amphibians by Month
The High Plains are flat shortgrass prairie with playa lakes that fill after storms. Woodhouse's Toads and Great Plains Toads breed in the rain pools. Gopher Snakes and Plains Garter Snakes are common. May is the busiest month. The Prairie Rattlesnake is the rattlesnake you're most likely to meet.
24 species2 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 High Plains, by group and month
| Group | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Snakes | 3 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 4 | |||
| Lizards | 1 | 5 | 5 | 4 | 4 | 4 | 5 | 1 | 1 | |||
| Turtles | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 1 | 1 | |||
| Frogs and Toads | 1 | 2 | 5 | 8 | 8 | 8 | 7 | 7 | 3 | 1 | ||
| Salamanders | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
Numbers = species active that month (at peak or just starting / winding down).
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23 species at peak or shoulder in September
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shoulderAbout High Plains
When are reptiles and amphibians most active in the High Plains?
May is the busiest month in the High Plains, with 20 species at peak activity. At least half of the area's species are active from April through October.
What reptiles and amphibians live in the High Plains?
24 species have enough iNaturalist records to show here: 8 frogs and toads, 8 snakes, 5 lizards, 2 turtles, and 1 salamander. The most-reported are the Woodhouse's Toad, Gopher Snake, and American Bullfrog.
Are there venomous snakes in the High Plains?
Yes. The Prairie Rattlesnake and Western Diamond-backed Rattlesnake live here. Don't handle them.
Which reptiles and amphibians in the High Plains are introduced?
The Mediterranean House Gecko is not native here.
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.