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Harrison County, Missouri

Maps

Landmark Map

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

Natural Divisions Locality Map

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

Ecological Drainage Unit Locality Map

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

Major Watersheds Locality Map

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

Major Rivers Locality Map

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

Level I Ecoregion Locality Map

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

Level II Ecoregion Locality Map

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

Level III Ecoregion Locality Map

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

Level IV Ecoregion Locality Map

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

Presettlement Prairie Locality Map

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

Historical Vegetation Map

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

WaterPrairieBarrens / Scrub
ForestWoodlandOpen Woodland

Geology Locality Map

Geology locality map for Harrison County, Missouri
Geology locality map for Harrison 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

Harrison County has a total of 65 valid, non-duplicated collections representing 31 species and 39 localities. There are a total of 18 collectors and 37 collection dates for the county. This results in a total of 41 expeditions for the county, a measure of unique date / collector(s) combinations. The county's earliest collection year is 1941 and its most recent collection year is 2022. The earliest and latest collection dates (independent of earliest and most recent collection years) are March 27 and September 30, respectively. If you have a new record to report for Harrison County, read the New Records section of the FAQ.

Collection Summary by Species

Collection summary for Harrison 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 2 2 1 2 2 1983 1983
Agkistrodon contortrix Eastern Copperhead 1 1 1 1 1 2001 2001
Ambystoma texanum Small-mouthed Salamander 1 1 1 1 1 2002 2002
Anaxyrus americanus American Toad 2 2 2 2 2 1993 1993
Apalone spinifera Northern Spiny Softshell 1 1 1 1 1 1993 1993
Carphophis vermis Western Wormsnake 1 1 1 1 1 2002 2002
Chelydra serpentina North American Snapping Turtle 2 2 4 2 2 1983 2014
Chrysemys picta Western Painted Turtle 4 4 4 4 4 1998 2017
Coluber constrictor North American Racer 3 3 4 3 3 1992 2001
Crotalus horridus Timber Rattlesnake 1 1 1 1 1 2006 2006
Diadophis punctatus Ring-necked Snake 1 1 1 1 1 1958 1958
Lampropeltis calligaster Prairie Kingsnake 4 4 5 4 4 1950 2014
Lampropeltis holbrooki Speckled Kingsnake 2 2 3 2 2 1992 2004
Lampropeltis triangulum Eastern Milksnake 1 1 1 1 1 2001 2001
Lithobates blairi Plains Leopard Frog 2 2 1 2 2 1983 1993
Lithobates catesbeianus North American Bullfrog 4 4 5 4 4 1992 2014
Nerodia sipedon Common Watersnake 2 2 2 2 2 1983 2012
Opheodrys vernalis Smooth Greensnake 2 3 2 2 2 1970 1970
Ophisaurus attenuatus Western Slender Glass Lizard 1 1 1 1 1 2022 2022
Pantherophis obsoletus Western Ratsnake 1 1 1 1 1 1992 1992
Pituophis catenifer Bullsnake 2 2 2 2 2 1941 1970
Plestiodon fasciatus Common Five-lined Skink 1 1 1 1 1 2001 2001
Plestiodon septentrionalis Prairie Skink 4 8 5 6 6 1992 2003
Pseudacris crucifer Spring Peeper 3 5 4 3 4 1993 1993
Pseudacris maculata Boreal Chorus Frog 1 1 2 1 1 2001 2001
Storeria dekayi DeKay's Brownsnake 2 2 3 2 2 1983 1992
Terrapene ornata Ornate Box Turtle 1 1 1 1 1 1961 1961
Terrapene triunguis Three-toed Box Turtle 1 1 1 1 1
Thamnophis sirtalis Common Gartersnake 2 2 3 2 2 1983 1992
Tropidoclonion lineatum Lined Snake 1 1 2 1 1 1992 1992
Virginia valeriae Western Smooth Earthsnake 2 2 3 2 2 1997 2003

Potential Species Records

Potential species for Harrison 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 Dryophytes chrysoscelis Cope's Gray Treefrog Same Level IV ecoregion, within 5 miles Loess Flats and Till Plains
2 Thamnophis proximus Orange-striped Ribbonsnake Same Level IV ecoregion, within 5 miles Loess Flats and Till Plains
2 Trachemys scripta Red-eared Slider Same Level IV ecoregion, within 5 miles Loess Flats and Till Plains
4 Ambystoma tigrinum Eastern Tiger Salamander Same Level IV ecoregion, within 10 miles Loess Flats and Till Plains
4 Apalone mutica Midland Smooth Softshell Same watershed, within 10 miles Thompson
4 Dryophytes versicolor Gray Treefrog Same Level IV ecoregion, within 10 miles Loess Flats and Till Plains
4 Heterodon platirhinos Eastern Hog-nosed Snake Same Level IV ecoregion, within 10 miles Loess Flats and Till Plains
4 Lithobates pipiens Northern Leopard Frog Same Level IV ecoregion, within 10 miles Loess Flats and Till Plains
4 Lithobates sphenocephalus Coastal Plains Leopard Frog Same Level IV ecoregion, within 10 miles Loess Flats and Till Plains
4 Nerodia rhombifer Northern Diamond-backed Watersnake Same Level IV ecoregion, within 10 miles Loess Flats and Till Plains
4 Regina grahamii Graham's Crawfish Snake Same watershed, within 10 miles Thompson
4 Regina grahamii Graham's Crawfish Snake Same watershed, within 10 miles Upper Grand
4 Thamnophis radix Plains Gartersnake Same Level IV ecoregion, within 10 miles Loess Flats and Till Plains
6 Graptemys pseudogeographica False Map Turtle Same watershed, within 20 miles Upper Grand
8 Nerodia erythrogaster Yellow-bellied Watersnake Same Level IV ecoregion, within 30 miles Loess Flats and Till Plains

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.