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Linn County, Missouri

Maps

Landmark Map

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

Natural Divisions Locality Map

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

Ecological Drainage Unit Locality Map

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

Major Watersheds Locality Map

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

Major Rivers Locality Map

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

Level I Ecoregion Locality Map

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

Level II Ecoregion Locality Map

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

Level III Ecoregion Locality Map

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

Level IV Ecoregion Locality Map

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

Presettlement Prairie Locality Map

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

Historical Vegetation Map

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

WaterPrairieBarrens / Scrub
ForestWoodlandOpen Woodland

Geology Locality Map

Geology locality map for Linn County, Missouri
Geology locality map for Linn 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

Linn County has a total of 100 valid, non-duplicated collections representing 33 species and 35 localities. There are a total of 24 collectors and 43 collection dates for the county. This results in a total of 46 expeditions for the county, a measure of unique date / collector(s) combinations. The county's earliest collection year is 1933 and its most recent collection year is 2025. The earliest and latest collection dates (independent of earliest and most recent collection years) are March 11 and November 28, respectively. If you have a new record to report for Linn County, read the New Records section of the FAQ.

Collection Summary by Species

Collection summary for Linn 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 12 2 3 3 1933 1983
Ambystoma texanum Small-mouthed Salamander 2 3 4 2 2 1980 1984
Ambystoma tigrinum Eastern Tiger Salamander 1 1 1 1 1 2006 2006
Anaxyrus americanus American Toad 3 3 3 3 3 1963 1982
Carphophis vermis Western Wormsnake 1 1 1 1 1 2007 2007
Chelydra serpentina North American Snapping Turtle 2 2 2 2 2 1982 2015
Chrysemys picta Western Painted Turtle 2 2 2 2 2 1985 2012
Coluber constrictor North American Racer 5 7 6 5 5 1941 2023
Diadophis punctatus Ring-necked Snake 2 4 4 2 2 1984 1984
Dryophytes versicolor Gray Treefrog 1 1 1 1 1 2005 2005
Lampropeltis calligaster Prairie Kingsnake 2 2 2 2 2 2003 2003
Lampropeltis holbrooki Speckled Kingsnake 1 1 2 1 1 2004 2004
Lithobates blairi Plains Leopard Frog 2 3 4 3 3 1964 1984
Lithobates catesbeianus North American Bullfrog 2 2 2 2 2 1980 1980
Lithobates clamitans North American Green Frog 1 1 3 1 1 2003 2003
Lithobates sphenocephalus Coastal Plains Leopard Frog 3 6 4 3 3 1933 1984
Nerodia erythrogaster Yellow-bellied Watersnake 2 3 2 2 2 2025 2025
Nerodia rhombifer Northern Diamond-backed Watersnake 1 1 1 1 1 1960 1960
Nerodia sipedon Common Watersnake 2 2 2 2 2 2005 2007
Ophisaurus attenuatus Western Slender Glass Lizard 1 1 1 1 1 1996 1996
Pantherophis obsoletus Western Ratsnake 3 4 3 4 4 1980 2005
Plestiodon fasciatus Common Five-lined Skink 1 1 3 1 1 2003 2003
Pseudacris crucifer Spring Peeper 1 1 2 1 1 2004 2004
Pseudacris maculata Boreal Chorus Frog 1 1 3 1 1 2003 2003
Regina grahamii Graham's Crawfish Snake 1 2 1 2 2 1980 1984
Scincella lateralis Little Brown Skink 1 1 3 1 1 2004 2004
Sistrurus tergeminus Prairie Massasauga 1 4 2 1 2
Storeria dekayi DeKay's Brownsnake 5 6 3 5 5 1984 2024
Terrapene ornata Ornate Box Turtle 3 3 2 3 3 1986 2013
Thamnophis proximus Orange-striped Ribbonsnake 5 12 4 4 5 1933 2011
Thamnophis radix Plains Gartersnake 2 3 4 2 2 1933 1984
Thamnophis sirtalis Common Gartersnake 2 3 3 2 3 1984 1984
Trachemys scripta Red-eared Slider 1 1 1 1 1 2005 2005

Potential Species Records

Potential species for Linn 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 Agkistrodon contortrix Eastern Copperhead Same Level IV ecoregion, within 5 miles Loess Flats and Till Plains
2 Crotalus horridus Timber Rattlesnake Same Level IV ecoregion, within 5 miles Loess Flats and Till Plains
2 Dryophytes chrysoscelis Cope's Gray Treefrog Same Level IV ecoregion, within 5 miles Loess Flats and Till Plains
2 Lithobates sylvaticus Wood Frog Same Level IV ecoregion, within 5 miles Loess Flats and Till Plains
4 Apalone spinifera Northern Spiny Softshell Same watershed, within 10 miles Lower Grand
4 Heterodon platirhinos Eastern Hog-nosed Snake Same Level IV ecoregion, within 10 miles Loess Flats and Till Plains
4 Lithobates areolatus Northern Crawfish Frog Same Level IV ecoregion, within 10 miles Loess Flats and Till Plains
4 Notophthalmus viridescens Central Newt Same Level IV ecoregion, within 10 miles Loess Flats and Till Plains
4 Tropidoclonion lineatum Lined Snake Same Level IV ecoregion, within 10 miles Loess Flats and Till Plains
6 Anaxyrus fowleri Fowler's Toad Same Level IV ecoregion, within 20 miles Loess Flats and Till Plains
6 Lampropeltis triangulum Eastern Milksnake Same Level IV ecoregion, within 20 miles Loess Flats and Till Plains
6 Plestiodon laticeps Broad-headed Skink Same Level IV ecoregion, within 20 miles Loess Flats and Till Plains
6 Storeria occipitomaculata Red-bellied Snake Same Level IV ecoregion, within 20 miles Loess Flats and Till Plains
6 Terrapene triunguis Three-toed Box Turtle Same Level IV ecoregion, within 20 miles Loess Flats and Till Plains
6 Virginia valeriae Western Smooth Earthsnake Same Level IV ecoregion, within 20 miles Loess Flats and Till Plains
8 Opheodrys aestivus Northern Rough Greensnake 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.