This site will look much better in a browser that supports web standards, but it is accessible to any browser or Internet device.

Saint Charles County, Missouri

Maps

Landmark Map

Landmark locality map for Saint Charles County, Missouri
Landmark locality map for Saint Charles County, Missouri
Map created 15 April 2026.

Interstate HighwayRailroadUS Army Corps of Engineers
US HighwayDepartment of ConservationUS Fish and Wildlife Service
State HighwayDepartment of Natural ResourcesNational Park Service
County HighwayUS Forest ServiceUS Department of Defense

Locator Map

Locator map for Saint Charles County, Missouri
Locator map for Saint Charles County, Missouri
Map created 15 April 2026.

Natural Divisions Locality Map

Natural divisions and sections locality map for Saint Charles County, Missouri
Natural Divisions locality map for Saint Charles County, Missouri
Map created 15 April 2026.

Ecological Drainage Unit Locality Map

Ecological drainage unit locality map for Saint Charles County, Missouri
Ecological Drainage Units locality map for Saint Charles County, Missouri
Map created 15 April 2026.

Major Watersheds Locality Map

Major watersheds locality map for Saint Charles County, Missouri
Major Watersheds locality map for Saint Charles County, Missouri
Map created 15 April 2026.

Major Rivers Locality Map

Major rivers locality map for Saint Charles County, Missouri
Major Rivers locality map for Saint Charles County, Missouri
Map created 15 April 2026.

Level I Ecoregion Locality Map

Level I Ecoregion locality map for Saint Charles County, Missouri
Level I Ecoregion locality map for Saint Charles County, Missouri
Map created 15 April 2026.

Level II Ecoregion Locality Map

Level II Ecoregion locality map for Saint Charles County, Missouri
Level II Ecoregion locality map for Saint Charles County, Missouri
Map created 15 April 2026.

Level III Ecoregion Locality Map

Level III Ecoregion locality map for Saint Charles County, Missouri
Level III Ecoregion locality map for Saint Charles County, Missouri
Map created 15 April 2026.

Level IV Ecoregion Locality Map

Level IV Ecoregion locality map for Saint Charles County, Missouri
Level IV Ecoregion locality map for Saint Charles County, Missouri
Map created 15 April 2026.

Presettlement Prairie Locality Map

Presettlement prairie locality map for Saint Charles County, Missouri
Presettlement Prairie locality map for Saint Charles County, Missouri
Map created 15 April 2026.

Historical Vegetation Map

Historical vegetation map for Saint Charles County, Missouri
Historical Vegetation map for Saint Charles County, Missouri
Map created 15 April 2026.

WaterPrairieBarrens / Scrub
ForestWoodlandOpen Woodland

Geology Locality Map

Geology locality map for Saint Charles County, Missouri
Geology locality map for Saint Charles County, Missouri
Map created 15 April 2026.

AlluviumSandstoneDolomiteLimestone
ClaySandstone / LimestoneDolomite / LimestoneLimestone / Sandstone
IgneousSandstone / DolomiteDolomite / ShaleLimestone / Shale
Limestone / Sandstone / Shale

Species List

Salamanders (Caudata)

Frogs (Anura)

Lizards (Squamata, "Lizards")

Snakes (Squamata, "Snakes")

Turtles (Testudines)

Collection Summary

Saint Charles County has a total of 486 valid, non-duplicated collections representing 66 species and 118 localities. There are a total of 69 collectors and 155 collection dates for the county. This results in a total of 166 expeditions for the county, a measure of unique date / collector(s) combinations. The county's earliest collection year is 1889 and its most recent collection year is 2025. The earliest and latest collection dates (independent of earliest and most recent collection years) are February 4 and November 27, respectively. If you have a new record to report for Saint Charles County, read the New Records section of the FAQ.

Collection Summary by Species

Collection summary for Saint Charles County by species. Some values are unavailable since some records are represented solely by historical literature reports, which sometimes lack complete collecting data. Click on a species or common name to view more information about that species. Click on column headings to sort by that column.
Species Common Name Localities Collections Collectors Dates Expeditions Earliest Year Latest Year
Acris blanchardi Blanchard's Cricket Frog 3 13 5 3 4 1929 1995
Agkistrodon contortrix Eastern Copperhead 2 2 2 2 2 1975 1999
Ambystoma annulatum Ringed Salamander 1 2 3 1 2 1995 1995
Ambystoma maculatum Spotted Salamander 1 4 3 1 2 1995 1995
Ambystoma opacum Marbled Salamander 1 1 1 1 1 2013 2013
Ambystoma texanum Small-mouthed Salamander 2 7 4 5 6 1900 1934
Ambystoma tigrinum Eastern Tiger Salamander 2 5 3 3 3 1940 1974
Anaxyrus americanus American Toad 2 2 2 2 2 1940 1981
Anaxyrus fowleri Fowler's Toad 3 8 3 3 3 1962 1993
Apalone spinifera Northern Spiny Softshell 1 6 1 1 1 1931 1931
Aspidoscelis sexlineatus Prairie Racerunner 1 1 2 1 1 2008 2008
Carphophis vermis Western Wormsnake 1 2 2 2 2 1898 1898
Chelydra serpentina North American Snapping Turtle 1 1 1 1 1 1985 1985
Chrysemys picta Western Painted Turtle 5 10 5 3 4 1929 1931
Coluber constrictor North American Racer 7 7 5 7 7 1939 2010
Crotalus horridus Timber Rattlesnake 1 1 1 1 1 2003 2003
Diadophis punctatus Ring-necked Snake 2 2 2 2 2 1940 1971
Dryophytes chrysoscelis Cope's Gray Treefrog 1 1 1 1 1 1989 1989
Emydoidea blandingii Blanding's Turtle 1 1 2 1 1 1990 1990
Eurycea longicauda Long-tailed Salamander 1 2 2 1 1 1995 1995
Gastrophryne carolinensis Eastern Narrow-mouthed Toad 1 1 1 1 1 2015 2015
Graptemys geographica Northern Map Turtle 1 1 1 1 1
Graptemys ouachitensis Ouachita Map Turtle 1 1 1 1 1 1993 1993
Graptemys pseudogeographica False Map Turtle 2 3 2 2 2 1922 1972
Heterodon platirhinos Eastern Hog-nosed Snake 3 7 2 5 5 1889 1985
Lampropeltis calligaster Prairie Kingsnake 7 10 6 10 10 1900 2010
Lampropeltis holbrooki Speckled Kingsnake 6 8 5 7 7 1906 1989
Lampropeltis triangulum Eastern Milksnake 2 2 2 2 2 2010 2010
Lithobates areolatus Northern Crawfish Frog 2 4 2 3 3 1938 1938
Lithobates blairi Plains Leopard Frog 4 42 4 3 3 1900 1989
Lithobates catesbeianus North American Bullfrog 4 7 6 6 7 1962 1998
Lithobates clamitans North American Green Frog 1 1 1 1 1 1903 1903
Lithobates palustris Pickerel Frog 2 2 3 2 2 2003 2003
Lithobates sphenocephalus Coastal Plains Leopard Frog 7 23 6 7 7 1903 1989
Lithobates sylvaticus Wood Frog 1 4 3 1 2 1995 1995
Nerodia erythrogaster Yellow-bellied Watersnake 5 5 7 5 5 1983 2025
Nerodia rhombifer Northern Diamond-backed Watersnake 2 4 3 3 3 1906 1990
Nerodia sipedon Common Watersnake 4 5 6 5 5 1906 1990
Notophthalmus viridescens Central Newt 3 18 5 3 4 1985 1995
Opheodrys aestivus Northern Rough Greensnake 1 1 1 1 1 2009 2009
Opheodrys vernalis Smooth Greensnake 2 2 2 2 2 1899 1899
Pantherophis obsoletus Western Ratsnake 7 9 5 8 8 1958 2010
Pantherophis vulpinus Eastern Foxsnake 9 10 5 8 8 1900 2010
Pituophis catenifer Bullsnake 2 2 2 2 2 1935 1935
Plestiodon fasciatus Common Five-lined Skink 2 3 3 3 3 1940 1985
Plestiodon laticeps Broad-headed Skink 2 2 2 2 2 1975 1989
Plethodon albagula Western Slimy Salamander 1 1 1 1 1
Pseudacris crucifer Spring Peeper 1 2 2 1 1 2003 2003
Pseudacris maculata Boreal Chorus Frog 4 14 7 5 6 1900 1995
Pseudemys concinna Eastern River Cooter 2 2 4 2 2 2000 2010
Regina grahamii Graham's Crawfish Snake 4 6 6 6 6 1900 2010
Sceloporus consobrinus Prairie Lizard 3 5 4 4 4 1940 2008
Scincella lateralis Little Brown Skink 2 2 2 2 2 1982 2007
Siren nettingi Western Lesser Siren 1 1 1 1 1 1986 1986
Sistrurus catenatus Eastern Massasauga 8 32 6 9 9 1899 1941
Spea bombifrons Plains Spadefoot 5 16 2 5 5 1975 2010
Sternotherus odoratus Eastern Musk Turtle 1 1 1 1 1 1992 1992
Storeria dekayi DeKay's Brownsnake 3 3 5 3 3 1989 1993
Storeria occipitomaculata Red-bellied Snake 2 2 1 2 2 2010 2013
Terrapene ornata Ornate Box Turtle 2 2 2 2 2 2013 2013
Terrapene triunguis Three-toed Box Turtle 4 5 5 3 5 1973 1989
Thamnophis proximus Orange-striped Ribbonsnake 5 19 4 9 10 1905 1989
Thamnophis radix Plains Gartersnake 11 78 5 10 11 1900 1939
Thamnophis sirtalis Common Gartersnake 24 29 12 24 25 1929 1993
Trachemys scripta Red-eared Slider 5 7 6 5 5 1909 1994
Virginia valeriae Western Smooth Earthsnake 1 1 1 1 1 1965 1965

Potential Species Records

Potential species for Saint Charles County. Species are listed in descending order of their likelihood of occurrence within the county. Click on a species or common name to view more information about that species. Click on column headings to sort by that column.
Likelihood Species Common Name Rationale Ecoregion / Watershed
2 Anaxyrus woodhousii Rocky Mountain Toad Same Level IV ecoregion, within 5 miles Middle Mississippi Alluvial Plain
2 Hemidactylus turcicus 1 Mediterranean Gecko Same Level IV ecoregion, within 5 miles River Hills
2 Necturus maculosus Mudpuppy Same watershed, within 5 miles The Sny
2 Ophisaurus attenuatus Western Slender Glass Lizard Same Level IV ecoregion, within 5 miles River Hills
2 Plethodon serratus Southern Red-backed Salamander Same Level IV ecoregion, within 5 miles River Hills
2 Tantilla gracilis Flat-headed Snake Same Level IV ecoregion, within 5 miles River Hills
2 Tropidoclonion lineatum Lined Snake Same Level IV ecoregion, within 5 miles River Hills
4 Dryophytes versicolor Gray Treefrog Same Level IV ecoregion, within 10 miles River Hills
4 Hemidactylium scutatum Four-toed Salamander Same Level IV ecoregion, within 10 miles River Hills
4 Plestiodon anthracinus Southern Coal Skink Same Level IV ecoregion, within 10 miles River Hills
6 Apalone mutica Midland Smooth Softshell Same watershed, within 20 miles The Sny
8 Crotaphytus collaris Eastern Collared Lizard Same Level IV ecoregion, within 30 miles River Hills
8 Masticophis flagellum Eastern Coachwhip Same Level IV ecoregion, within 30 miles River Hills
8 Pantherophis emoryi Great Plains Ratsnake Same Level IV ecoregion, within 30 miles Middle Mississippi Alluvial Plain
8 Pantherophis emoryi Great Plains Ratsnake Same Level IV ecoregion, within 30 miles River Hills
10 Dryophytes cinereus Green Treefrog Same Level IV ecoregion, adjacent county Middle Mississippi Alluvial Plain
10 Dryophytes cinereus Green Treefrog Same Level IV ecoregion, adjacent county River Hills
10 Eurycea lucifuga Cave Salamander Same Level IV ecoregion, adjacent county River Hills

Checklist

All MOHAP publications are released in portable document format (PDF), an ISO standard. You must download and install a reader (click icon below) to view these documents. A state checklist, including all counties, is available on the publications page.

Notes

1 This species is not native to Missouri. Thus far, non-native reptiles in Missouri have only been found in urban areas and do not appear to constitute a threat to our native herpetofauna. This is not the case everywhere and non-native species that become invasive are considered by many biologists to be a major threat, second only to habitat loss, to our native species. Care should be taken to prevent the spread of this and all non-native species. Furthermore, it is illegal to release non-native species into the environment.