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Saint Louis County, Missouri

Maps

Landmark Map

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

Natural Divisions Locality Map

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

Ecological Drainage Unit Locality Map

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

Major Watersheds Locality Map

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

Major Rivers Locality Map

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

Level I Ecoregion Locality Map

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

Level II Ecoregion Locality Map

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

Level III Ecoregion Locality Map

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

Level IV Ecoregion Locality Map

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

Presettlement Prairie Locality Map

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

Historical Vegetation Map

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

WaterPrairieBarrens / Scrub
ForestWoodlandOpen Woodland

Geology Locality Map

Geology locality map for Saint Louis County, Missouri
Geology locality map for Saint Louis 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 Louis County has a total of 852 valid, non-duplicated collections representing 74 species and 155 localities. There are a total of 100 collectors and 259 collection dates for the county. This results in a total of 284 expeditions for the county, a measure of unique date / collector(s) combinations. The county's earliest collection year is 1878 and its most recent collection year is 2025. The earliest and latest collection dates (independent of earliest and most recent collection years) are January 6 and December 4, respectively. If you have a new record to report for Saint Louis County, read the New Records section of the FAQ.

Note: For the purposes of tracking county records and summarizing collections, the small number of collections for Saint Louis City have been combined with the county of Saint Louis.

Collection Summary by Species

Collection summary for Saint Louis 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 9 34 11 12 14 1890 1971
Agkistrodon contortrix Eastern Copperhead 9 15 5 10 11 1889 2009
Agkistrodon piscivorus Northern Cottonmouth 2 2 1 1 1 1995 1995
Ambystoma annulatum Ringed Salamander 8 56 6 8 8 1980 1990
Ambystoma maculatum Spotted Salamander 4 12 7 6 7 1895 1987
Ambystoma opacum Marbled Salamander 4 15 5 8 8 1898 1992
Ambystoma texanum Small-mouthed Salamander 9 14 10 9 11 1893 2009
Ambystoma tigrinum Eastern Tiger Salamander 5 19 8 12 14 1884 1986
Anaxyrus americanus American Toad 4 10 5 6 7 1886 2020
Anaxyrus fowleri Fowler's Toad 6 8 5 5 6 1886 2020
Anaxyrus woodhousii Rocky Mountain Toad 1 1 2 1 1 2025 2025
Apalone mutica Midland Smooth Softshell 4 11 3 2 4 1913 1913
Apalone spinifera Northern Spiny Softshell 2 4 1 4 4 1907 1913
Aspidoscelis sexlineatus Prairie Racerunner 2 8 2 2 3 1890 1890
Carphophis vermis Western Wormsnake 10 25 8 12 13 1888 2009
Chelydra serpentina North American Snapping Turtle 1 3 1 3 3 1900 1908
Chrysemys picta Western Painted Turtle 2 3 2 3 3 1890 1899
Coluber constrictor North American Racer 14 25 10 16 18 1889 2025
Crotalus horridus Timber Rattlesnake 7 8 4 3 5 1907 2009
Diadophis punctatus Ring-necked Snake 15 44 14 16 18 1887 1996
Dryophytes chrysoscelis Cope's Gray Treefrog 1 1 1 1 1
Dryophytes cinereus Green Treefrog 1 1 1 1 1 2015 2015
Dryophytes versicolor Gray Treefrog 1 1 1 1 1 1971 1971
Eurycea longicauda Long-tailed Salamander 9 20 7 10 10 1887 1996
Eurycea lucifuga Cave Salamander 4 6 4 4 4 1932 1996
Gastrophryne carolinensis Eastern Narrow-mouthed Toad 5 8 3 4 4 1891 1950
Graptemys geographica Northern Map Turtle 1 2 1 1 1
Graptemys pseudogeographica False Map Turtle 3 12 4 5 6 1884 1961
Hemidactylus turcicus 1 Mediterranean Gecko 4 5 7 4 4 2003 2023
Heterodon platirhinos Eastern Hog-nosed Snake 5 8 5 5 6 1890 2010
Lampropeltis calligaster Prairie Kingsnake 17 24 14 16 18 1893 1985
Lampropeltis holbrooki Speckled Kingsnake 4 7 4 4 4 1889 1932
Lampropeltis triangulum Eastern Milksnake 9 22 8 12 13 1885 2010
Lithobates blairi Plains Leopard Frog 2 2 2 2 2 1891 2020
Lithobates catesbeianus North American Bullfrog 3 9 3 5 5 1885 1963
Lithobates clamitans North American Green Frog 2 4 4 3 4 1885 1959
Lithobates palustris Pickerel Frog 3 8 2 3 3 1884 1909
Lithobates sphenocephalus Coastal Plains Leopard Frog 3 5 4 5 5 1891 1971
Lithobates sylvaticus Wood Frog 3 4 3 3 3 1912 2010
Necturus maculosus Mudpuppy 2 6 2 4 5 1885 1906
Nerodia rhombifer Northern Diamond-backed Watersnake 3 5 3 3 4 1891 1961
Nerodia sipedon Common Watersnake 4 8 3 6 6 1906 2022
Notophthalmus viridescens Central Newt 8 42 6 9 10 1890 1987
Opheodrys aestivus Northern Rough Greensnake 3 6 5 5 6 1890 1971
Ophisaurus attenuatus Western Slender Glass Lizard 3 6 4 2 4 1909 1909
Pantherophis obsoletus Western Ratsnake 6 15 7 13 15 1889 2017
Pantherophis vulpinus Eastern Foxsnake 1 1 1 1 1 2014 2014
Pituophis catenifer Bullsnake 3 3 2 2 2 2013 2013
Plestiodon anthracinus Southern Coal Skink 2 2 2 2 2 1993 1993
Plestiodon fasciatus Common Five-lined Skink 7 14 4 9 10 1897 1965
Plestiodon laticeps Broad-headed Skink 5 6 4 5 5 1884 1986
Plethodon albagula Western Slimy Salamander 9 14 6 7 7 1890 1965
Plethodon serratus Southern Red-backed Salamander 12 34 11 12 14 1896 2025
Pseudacris crucifer Spring Peeper 3 6 4 5 5 1892 1971
Pseudacris maculata Boreal Chorus Frog 4 11 6 8 9 1891 1971
Pseudemys concinna Eastern River Cooter 1 1 1 1 1 1994 1994
Regina grahamii Graham's Crawfish Snake 4 9 4 3 5 1897 1933
Sceloporus consobrinus Prairie Lizard 8 18 8 9 9 1888 1967
Scincella lateralis Little Brown Skink 6 6 4 5 5 1889 1965
Siren nettingi Western Lesser Siren 2 2 2 2 2 1908 1908
Sistrurus catenatus Eastern Massasauga 3 4 2 1 2
Spea bombifrons Plains Spadefoot 3 5 3 2 2 1975 2014
Sternotherus odoratus Eastern Musk Turtle 1 1 1 1 1
Storeria dekayi DeKay's Brownsnake 5 8 3 4 4 1898 1933
Storeria occipitomaculata Red-bellied Snake 3 4 4 3 4 1889 2010
Tantilla gracilis Flat-headed Snake 6 10 5 6 6 1892 1965
Terrapene ornata Ornate Box Turtle 3 6 3 2 3 1890 1890
Terrapene triunguis Three-toed Box Turtle 5 11 3 8 8 1878 1968
Thamnophis proximus Orange-striped Ribbonsnake 3 8 2 4 5 1905 1913
Thamnophis radix Plains Gartersnake 2 3 2 3 3 1892 1910
Thamnophis sirtalis Common Gartersnake 8 20 6 13 14 1884 1971
Trachemys scripta Red-eared Slider 4 11 5 7 8 1878 1960
Tropidoclonion lineatum Lined Snake 23 65 19 31 32 1885 1994
Virginia valeriae Western Smooth Earthsnake 5 9 4 4 5 1892 2025

Potential Species Records

Potential species for Saint Louis 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 Crotaphytus collaris Eastern Collared Lizard Same Level IV ecoregion, within 5 miles Eastern Ozark Border
2 Emydoidea blandingii Blanding's Turtle Same Level IV ecoregion, within 5 miles River Hills
2 Graptemys ouachitensis Ouachita Map Turtle Same watershed, within 5 miles Peruque-Piasa
2 Hemidactylium scutatum Four-toed Salamander Same Level IV ecoregion, within 5 miles Eastern Ozark Border
2 Masticophis flagellum Eastern Coachwhip Same Level IV ecoregion, within 5 miles Eastern Ozark Border
2 Nerodia erythrogaster Yellow-bellied Watersnake Same Level IV ecoregion, within 5 miles Middle Mississippi Alluvial Plain
2 Opheodrys vernalis Smooth Greensnake Same Level IV ecoregion, within 5 miles River Hills
2 Pantherophis emoryi Great Plains Ratsnake Same Level IV ecoregion, within 5 miles Middle Mississippi Alluvial Plain
2 Pantherophis emoryi Great Plains Ratsnake Same Level IV ecoregion, within 5 miles Eastern Ozark Border
4 Cryptobranchus alleganiensis Hellbender Same watershed, within 10 miles Meramec
5 Lithobates areolatus Northern Crawfish Frog Same Level III ecoregion, within 10 miles Interior River Valleys and Hills
6 Virginia striatula Rough Earthsnake Same Level IV ecoregion, within 20 miles Eastern Ozark Border
9 Sistrurus miliarius Western Pygmy Rattlesnake Same Level III ecoregion, within 30 miles Ozark Highlands

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.