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Warren County, Missouri

Maps

Landmark Map

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

Natural Divisions Locality Map

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

Ecological Drainage Unit Locality Map

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

Major Watersheds Locality Map

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

Major Rivers Locality Map

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

Level I Ecoregion Locality Map

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

Level II Ecoregion Locality Map

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

Level III Ecoregion Locality Map

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

Level IV Ecoregion Locality Map

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

Presettlement Prairie Locality Map

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

Historical Vegetation Map

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

WaterPrairieBarrens / Scrub
ForestWoodlandOpen Woodland

Geology Locality Map

Geology locality map for Warren County, Missouri
Geology locality map for Warren 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

Warren County has a total of 190 valid, non-duplicated collections representing 54 species and 86 localities. There are a total of 50 collectors and 75 collection dates for the county. This results in a total of 81 expeditions for the county, a measure of unique date / collector(s) combinations. The county's earliest collection year is 1908 and its most recent collection year is 2025. The earliest and latest collection dates (independent of earliest and most recent collection years) are January 25 and October 30, respectively. If you have a new record to report for Warren County, read the New Records section of the FAQ.

Collection Summary by Species

Collection summary for Warren 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 1 1 2 1 1 2001 2001
Agkistrodon contortrix Eastern Copperhead 3 3 4 3 3 2000 2013
Ambystoma annulatum Ringed Salamander 9 12 9 9 10 1971 2024
Ambystoma maculatum Spotted Salamander 5 7 4 4 4 1981 2020
Ambystoma opacum Marbled Salamander 1 2 1 1 1 1980 1980
Ambystoma tigrinum Eastern Tiger Salamander 1 2 1 1 1 1983 1983
Anaxyrus americanus American Toad 1 1 1 1 1 1999 1999
Anaxyrus fowleri Fowler's Toad 3 5 3 3 3 1969 1998
Anaxyrus woodhousii Rocky Mountain Toad 1 1 1 1 1 1998 1998
Aspidoscelis sexlineatus Prairie Racerunner 1 2 1 1 1
Carphophis vermis Western Wormsnake 2 2 4 2 2 2003 2003
Chelydra serpentina North American Snapping Turtle 1 5 1 2 2 1974 1974
Chrysemys picta Western Painted Turtle 2 2 3 2 2 1991 2009
Coluber constrictor North American Racer 2 2 2 2 2 1996 2001
Crotalus horridus Timber Rattlesnake 2 2 2 2 2 1993 2020
Diadophis punctatus Ring-necked Snake 4 7 4 4 4 1976 2018
Dryophytes versicolor Gray Treefrog 1 1 1 1 1 2013 2013
Eurycea longicauda Long-tailed Salamander 3 3 2 3 3 1981 2012
Graptemys pseudogeographica False Map Turtle 1 2 1 1 1 1972 1972
Hemidactylium scutatum Four-toed Salamander 3 3 5 3 3 2002 2011
Heterodon platirhinos Eastern Hog-nosed Snake 2 2 3 2 2 2013 2013
Lampropeltis holbrooki Speckled Kingsnake 1 1 1 1 1 2001 2001
Lampropeltis triangulum Eastern Milksnake 1 1 1 1 1
Lithobates blairi Plains Leopard Frog 2 2 3 2 2 1994 1998
Lithobates catesbeianus North American Bullfrog 1 2 2 1 1 1975 1975
Lithobates clamitans North American Green Frog 2 4 3 3 3 1975 1982
Lithobates palustris Pickerel Frog 1 1 1 1 1 2005 2005
Lithobates sphenocephalus Coastal Plains Leopard Frog 1 1 2 1 1 2001 2001
Lithobates sylvaticus Wood Frog 10 26 7 10 11 1978 2025
Necturus maculosus Mudpuppy 1 1 1 1 1 2005 2005
Nerodia sipedon Common Watersnake 2 2 2 2 2 2001 2001
Notophthalmus viridescens Central Newt 2 5 3 2 2 1980 2001
Opheodrys aestivus Northern Rough Greensnake 2 3 2 2 2 2000 2000
Ophisaurus attenuatus Western Slender Glass Lizard 2 2 2 2 2 2018 2018
Pantherophis obsoletus Western Ratsnake 1 1 1 1 1 2009 2009
Plestiodon anthracinus Southern Coal Skink 2 2 2 2 2 1976 1976
Plestiodon fasciatus Common Five-lined Skink 1 1 3 1 1 1997 1997
Plestiodon laticeps Broad-headed Skink 1 1 1 1 1 2003 2003
Plethodon albagula Western Slimy Salamander 4 5 8 4 4 1976 2018
Pseudacris crucifer Spring Peeper 3 3 4 3 3 1988 2021
Pseudacris maculata Boreal Chorus Frog 1 1 1 1 1
Sceloporus consobrinus Prairie Lizard 1 1 1 1 1 2000 2000
Scincella lateralis Little Brown Skink 1 1 5 1 1 2003 2003
Sistrurus catenatus Eastern Massasauga 1 2 1 1 1
Spea bombifrons Plains Spadefoot 7 12 2 3 3 1969 1975
Storeria dekayi DeKay's Brownsnake 4 5 4 4 4 1908 2009
Storeria occipitomaculata Red-bellied Snake 2 2 2 2 2 1966 2009
Tantilla gracilis Flat-headed Snake 1 1 2 1 1 2010 2010
Terrapene ornata Ornate Box Turtle 1 2 2 2 2 1976 1976
Terrapene triunguis Three-toed Box Turtle 6 23 3 5 5 1972 2005
Thamnophis proximus Orange-striped Ribbonsnake 1 1 2 1 1 2002 2002
Thamnophis sirtalis Common Gartersnake 3 3 4 3 3 2001 2009
Trachemys scripta Red-eared Slider 3 3 3 3 3 1991 2013
Virginia valeriae Western Smooth Earthsnake 2 2 3 2 2 2003 2018

Potential Species Records

Potential species for Warren 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 Apalone spinifera Northern Spiny Softshell Same watershed, within 5 miles Lower Missouri
2 Crotaphytus collaris Eastern Collared Lizard Same Level IV ecoregion, within 5 miles River Hills
2 Lampropeltis calligaster Prairie Kingsnake Same Level IV ecoregion, within 5 miles River Hills
2 Masticophis flagellum Eastern Coachwhip Same Level IV ecoregion, within 5 miles River Hills
2 Pantherophis emoryi Great Plains Ratsnake Same Level IV ecoregion, within 5 miles River Hills
6 Ambystoma texanum Small-mouthed Salamander Same Level IV ecoregion, within 20 miles River Hills
6 Emydoidea blandingii Blanding's Turtle Same Level IV ecoregion, within 20 miles River Hills
6 Gastrophryne carolinensis Eastern Narrow-mouthed Toad Same Level IV ecoregion, within 20 miles River Hills
6 Graptemys geographica Northern Map Turtle Same watershed, within 20 miles Lower Missouri
6 Graptemys ouachitensis Ouachita Map Turtle Same watershed, within 20 miles Cuivre
6 Lithobates areolatus Northern Crawfish Frog Same Level IV ecoregion, within 20 miles Claypan Prairie
6 Opheodrys vernalis Smooth Greensnake Same Level IV ecoregion, within 20 miles Claypan Prairie
6 Pantherophis vulpinus Eastern Foxsnake Same Level IV ecoregion, within 20 miles River Hills
6 Pituophis catenifer Bullsnake Same Level IV ecoregion, within 20 miles River Hills
6 Plethodon serratus Southern Red-backed Salamander Same Level IV ecoregion, within 20 miles River Hills
6 Pseudemys concinna Eastern River Cooter Same watershed, within 20 miles Peruque-Piasa
6 Regina grahamii Graham's Crawfish Snake Same watershed, within 20 miles Cuivre
6 Regina grahamii Graham's Crawfish Snake Same watershed, within 20 miles Peruque-Piasa
6 Sternotherus odoratus Eastern Musk Turtle Same watershed, within 20 miles Cuivre
6 Thamnophis radix Plains Gartersnake Same Level IV ecoregion, within 20 miles River Hills
6 Thamnophis radix Plains Gartersnake Same Level IV ecoregion, within 20 miles Claypan Prairie
7 Dryophytes chrysoscelis Cope's Gray Treefrog Same Level III ecoregion, within 20 miles Interior River Valleys and Hills
7 Nerodia erythrogaster Yellow-bellied Watersnake Same Level III ecoregion, within 20 miles Interior River Valleys and Hills
7 Nerodia rhombifer Northern Diamond-backed Watersnake Same Level III ecoregion, within 20 miles Interior River Valleys and Hills
7 Siren nettingi Western Lesser Siren Same Level III ecoregion, within 20 miles Interior River Valleys and Hills
8 Hemidactylus turcicus 1 Mediterranean Gecko Same Level IV ecoregion, within 30 miles 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.