Species List
Salamanders (Caudata)
- Ambystoma tigrinum (Green, 1825) - Eastern Tiger Salamander
Frogs (Anura)
- Anaxyrus americanus (Holbrook, 1836) - American Toad
- Acris blanchardi Harper, 1947 - Blanchard's Cricket Frog
- Pseudacris crucifer (Wied-Neuwied, 1838) - Spring Peeper
- Lithobates blairi (Mecham, Littlejohn, Oldham, Brown, and Brown, 1973) - Plains Leopard Frog
- Lithobates catesbeianus (Shaw, 1802) - American Bullfrog
- Lithobates pipiens (Schreber, 1782) - Northern Leopard Frog
- Lithobates sphenocephalus (Cope, 1886) - Southern Leopard Frog
Lizards (Lacertilia)
-
(none)
Snakes (Serpentes)
- Coluber constrictor Linnaeus, 1758 - North American Racer
- Diadophis punctatus (Linnaeus, 1766) - Ring-necked Snake
- Lampropeltis calligaster (Harlan, 1827) - Prairie Kingsnake
- Nerodia sipedon (Linnaeus, 1758) - Common Watersnake
- Pantherophis obsoletus (Say, 1823) - Western Ratsnake
- Thamnophis proximus (Say, 1823) - Orange-striped Ribbonsnake
- Thamnophis sirtalis (Linnaeus, 1758) - Common Gartersnake
- Crotalus horridus Linnaeus, 1758 - Timber Rattlesnake
Turtles (Testudines)
- Chelydra serpentina (Linnaeus, 1758) - Snapping Turtle
- Chrysemys picta (Schneider, 1783) - Western Painted Turtle
Collection Summary
Mercer County has a total of 32 valid, non-duplicated collections representing 18 species and 13 localities. There are a total of 14 collectors and 11 collection dates for the county. This results in a total of 11 expeditions for the county, a measure of unique date / collector(s) combinations. The county's earliest collection year is 1938 and its most recent collection year is 2018. The earliest and latest collection dates (independent of earliest and most recent collection years) are April 3 and September 13, respectively. If you have a new record to report for Mercer County, read the New Records section of the FAQ.
Collection Summary by Species
Potential Species Records
Likelihood | Species | Common Name | Rationale | Ecoregion / Watershed | |
---|---|---|---|---|---|
![]() | 2 | Pseudacris maculata | Boreal Chorus Frog | Same Level IV ecoregion, within 5 miles | Loess Flats and Till Plains |
![]() | 2 | Storeria dekayi | DeKay's Brownsnake | Same Level IV ecoregion, within 5 miles | Loess Flats and Till Plains |
![]() | 4 | Agkistrodon contortrix | Copperhead | Same Level IV ecoregion, within 10 miles | Loess Flats and Till Plains |
![]() | 4 | Ambystoma texanum | Small-mouthed Salamander | Same Level IV ecoregion, within 10 miles | Loess Flats and Till Plains |
![]() | 4 | Carphophis vermis | Western Wormsnake | Same Level IV ecoregion, within 10 miles | Loess Flats and Till Plains |
![]() | 4 | Lampropeltis holbrooki | Speckled Kingsnake | Same Level IV ecoregion, within 10 miles | Loess Flats and Till Plains |
![]() | 4 | Lampropeltis triangulum | Eastern Milksnake | Same Level IV ecoregion, within 10 miles | Loess Flats and Till Plains |
![]() | 4 | Plestiodon fasciatus | Common Five-lined Skink | Same Level IV ecoregion, within 10 miles | Loess Flats and Till Plains |
![]() | 4 | Thamnophis radix | Plains Gartersnake | Same Level IV ecoregion, within 10 miles | Loess Flats and Till Plains |
![]() | 6 | Apalone mutica | Midland Smooth Softshell | Same watershed, within 20 miles | Thompson |
![]() | 6 | Heterodon platirhinos | Eastern Hog-nosed Snake | Same Level IV ecoregion, within 20 miles | Loess Flats and Till Plains |
![]() | 6 | Hyla versicolor | Gray Treefrog | Same Level IV ecoregion, within 20 miles | Loess Flats and Till Plains |
![]() | 6 | Nerodia rhombifer | Diamond-backed Watersnake | Same Level IV ecoregion, within 20 miles | Loess Flats and Till Plains |
![]() | 6 | Opheodrys vernalis | Smooth Greensnake | Same Level IV ecoregion, within 20 miles | Loess Flats and Till Plains |
![]() | 6 | Pituophis catenifer | Bullsnake | Same Level IV ecoregion, within 20 miles | Loess Flats and Till Plains |
![]() | 6 | Plestiodon septentrionalis | Prairie Skink | Same Level IV ecoregion, within 20 miles | Loess Flats and Till Plains |
![]() | 6 | Regina grahamii | Graham's Crawfish Snake | Same watershed, within 20 miles | Thompson |
![]() | 6 | Scincella lateralis | Little Brown Skink | Same Level IV ecoregion, within 20 miles | Loess Flats and Till Plains |
![]() | 6 | Trachemys scripta | Red-eared Slider | Same Level IV ecoregion, within 20 miles | Loess Flats and Till Plains |
![]() | 6 | Tropidoclonion lineatum | Lined Snake | 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 | Hyla chrysoscelis | Cope's Gray Treefrog | Same Level IV ecoregion, within 30 miles | Loess Flats and Till Plains |
![]() | 8 | Terrapene carolina | Three-toed Box Turtle | Same Level IV ecoregion, within 30 miles | Loess Flats and Till Plains |
![]() | 8 | Terrapene ornata | Ornate Box Turtle | Same Level IV ecoregion, within 30 miles | Loess Flats and Till Plains |
![]() | 10 | Anaxyrus fowleri | Fowler's Toad | Same Level IV ecoregion, adjacent county | Loess Flats and Till Plains |
![]() | 10 | Apalone spinifera | Eastern Spiny Softshell | Adjacent county, same watershed | Lower Grand |
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.
Daniel, R.E., B.S. Edmond, and J.T. Briggler. 2020. Checklist of Mercer County Missouri Amphibians and Reptiles for 2019. <http://atlas.moherp.org/county/Mercer>
Daniel, R.E., B.S. Edmond, and J.T. Briggler. 2020. Checklist of Mercer County Missouri Amphibians and Reptiles for 2019. <http://atlas.moherp.org/county/Mercer> (with common names)