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Pantherophis emoryi (Baird and Girard, 1853) - Great Plains Ratsnake

Maps

Locality Map

Locality map for Pantherophis emoryi (Great Plains Ratsnake)
Locality map for Pantherophis emoryi (Great Plains Ratsnake).
Map created 15 April 2026.

County Map

County map for Pantherophis emoryi (Great Plains Ratsnake)
County map for Pantherophis emoryi (Great Plains Ratsnake).
Map created 15 April 2026.

Historical Locality Map

Historical locality map for Pantherophis emoryi (Great Plains Ratsnake)
Historical locality map for Pantherophis emoryi (Great Plains Ratsnake). Black circles ( ) represent records after 1986, blue squares ( ) represent records between 1966 and 1986, orange triangles ( ) represent records prior to 1966. Note that more recent records might conceal underlying older records.
Map created 15 April 2026.

Historical County Map

Historical county map for Pantherophis emoryi (Great Plains Ratsnake)
Historical county map for Pantherophis emoryi (Great Plains Ratsnake). Black circles ( ) represent records after 1986, blue squares ( ) represent records between 1966 and 1986, orange triangles ( ) represent records prior to 1966. Note that only the most recent county record for each county is shown.
Map created 15 April 2026.

Ecological Drainage Locality Map

Ecological Drainage Units map for Pantherophis emoryi (Great Plains Ratsnake)
Ecological Drainage Units locality map for Pantherophis emoryi (Great Plains Ratsnake).
Map created 15 April 2026.

Natural Divisions Locality Map

Natural Divisions locality map for Pantherophis emoryi (Great Plains Ratsnake)
Natural Divisions and Sections locality map for Pantherophis emoryi (Great Plains Ratsnake).
Map created 15 April 2026.

Major Watersheds Locality Map

Major watersheds map for Pantherophis emoryi (Great Plains Ratsnake)
Major Watersheds locality map for Pantherophis emoryi (Great Plains Ratsnake).
Map created 15 April 2026.

Level I Ecoregion Locality Map

Level I Ecoregions map for Pantherophis emoryi (Great Plains Ratsnake)
Level I Ecoregion locality map for Pantherophis emoryi (Great Plains Ratsnake).
Map created 15 April 2026.

Level II Ecoregion Locality Map

Level II Ecoregions map for Pantherophis emoryi (Great Plains Ratsnake)
Level II Ecoregion locality map for Pantherophis emoryi (Great Plains Ratsnake).
Map created 15 April 2026.

Level III Ecoregion Locality Map

Level III Ecoregions map for Pantherophis emoryi (Great Plains Ratsnake)
Level III Ecoregion locality map for Pantherophis emoryi (Great Plains Ratsnake).
Map created 15 April 2026.

Level IV Ecoregion Locality Map

Level IV Ecoregions map for Pantherophis emoryi (Great Plains Ratsnake)
Level IV Ecoregion locality map for Pantherophis emoryi (Great Plains Ratsnake).
Map created 15 April 2026.

Native Status

Pantherophis emoryi (Great Plains Ratsnake) is native to Missouri.

Collection Summary

Pantherophis emoryi (Great Plains Ratsnake) has a total of 100 valid, non-duplicated collections representing 39 counties and 81 localities. There are a total of 45 collectors and 63 collection dates for the species. This results in a total of 69 expeditions for the species, a measure of unique date / collector(s) combinations. The earliest collection year for the species in Missouri is 1899 and its most recent collection year is 2023. The earliest and latest collection dates (independent of earliest and most recent collection years) are January 5 and October 14, respectively. If you have a new record to report, read the New Records section of the FAQ.

Collection Summary by County

Collection summary for Pantherophis emoryi (Great Plains Ratsnake) by county. Some values are unavailable since some records are represented solely by historical literature reports, which sometimes lack complete collecting data. Click on a county name to view more information about that county. Click on column headings to sort by that column.
County Localities Collections Collectors Dates Expeditions Earliest Year Latest Year
Atchison 1 1 1 1 1 1943 1943
Barry 1 1 1 1 1 1939 1939
Barton 1 1 2 1 1 2009 2009
Bates 1 1 1 1 1 1945 1945
Boone 3 6 3 5 5 1960 2001
Butler 1 1 1 1 1 1966 1966
Camden 2 2 4 2 2 2008 2019
Carter 3 3 4 3 3 1941 1989
Cass 1 1 1 1 1 1945 1945
Cedar 2 2 2 2 2 1944 1944
Christian 1 1 2 1 1 1970 1970
Crawford 1 1 1 1 1
Dallas 1 1 2 1 1 2000 2000
Dent 1 1 2 1 1 2003 2003
Greene 1 1 1 1 1 2001 2001
Hickory 2 2 2 2 2 1940 1940
Howell 1 1 1 1 1 2022 2022
Iron 1 1 2 1 1 2009 2009
Jackson 1 1 1 1 1 1962 1962
Jefferson 13 22 4 5 7 1899 1938
Maries 1 1 1 1 1 2013 2013
McDonald 2 3 2 2 2 1930 1947
Miller 3 3 2 2 2 1971 1971
Montgomery 1 1 4 1 1 1999 1999
Morgan 1 1 1 1 1
Oregon 1 1 1 1 1 2002 2002
Osage 2 2 3 2 2 1993 2006
Ozark 3 3 5 3 3 1968 2023
Phelps 1 1 2 1 1 2002 2002
Platte 1 2 2 1 2 1970 1970
Pulaski 2 2 2 2 2 1951 1966
Saint Clair 2 3 2 2 2 2006 2009
Shannon 1 1 1 1 1 1950 1950
Stone 4 4 5 4 4 1906 2005
Taney 8 9 8 8 9 1934 2021
Texas 1 1 1 1 1 1976 1976
Washington 2 2 1 2 2 1909 1909
Wayne 2 3 4 3 3 1939 1999
Wright 3 4 3 3 4 1932 1971

Potential County Records

Potential counties for Pantherophis emoryi (Great Plains Ratsnake). Counties are listed in descending order of their likelihood of having this species. Click on a county to view more information about that county. Click on column headings to sort by that column.
Likelihood County Rationale Ecoregion / Watershed
2 Benton Same Level IV ecoregion, within 5 miles Central Plateau
2 Cole Same Level IV ecoregion, within 5 miles River Hills
2 Cole Same Level IV ecoregion, within 5 miles Osage/Gasconade Hills
2 Douglas Same Level IV ecoregion, within 5 miles White River Hills
2 Gasconade Same Level IV ecoregion, within 5 miles Osage/Gasconade Hills
2 Laclede Same Level IV ecoregion, within 5 miles Osage/Gasconade Hills
2 Lawrence Same Level IV ecoregion, within 5 miles Springfield Plateau
2 Madison Same Level IV ecoregion, within 5 miles St. Francois Knobs and Basins
2 Moniteau Same Level IV ecoregion, within 5 miles River Hills
2 Moniteau Same Level IV ecoregion, within 5 miles Prairie Ozark Border
2 Reynolds Same Level IV ecoregion, within 5 miles Current River Hills
2 Reynolds Same Level IV ecoregion, within 5 miles St. Francois Knobs and Basins
2 Saint Francois Same Level IV ecoregion, within 5 miles Meramec River Hills
2 Saint Louis Same Level IV ecoregion, within 5 miles Middle Mississippi Alluvial Plain
2 Saint Louis Same Level IV ecoregion, within 5 miles Eastern Ozark Border
2 Vernon Same Level IV ecoregion, within 5 miles Cherokee Plains
2 Warren Same Level IV ecoregion, within 5 miles River Hills
4 Audrain Same Level IV ecoregion, within 10 miles Claypan Prairie
4 Callaway Same Level IV ecoregion, within 10 miles Claypan Prairie
4 Callaway Same Level IV ecoregion, within 10 miles River Hills
4 Clay Same Level IV ecoregion, within 10 miles Rolling Loess Prairies
4 Cooper Same Level IV ecoregion, within 10 miles River Hills
4 Franklin Same Level IV ecoregion, within 10 miles Eastern Ozark Border
4 Franklin Same Level IV ecoregion, within 10 miles Meramec River Hills
4 Henry Same Level IV ecoregion, within 10 miles Osage/Gasconade Hills
4 Jasper Same Level IV ecoregion, within 10 miles Cherokee Plains
4 Johnson Same Level IV ecoregion, within 10 miles Wooded Osage Plains
4 Lafayette Same Level IV ecoregion, within 10 miles Wooded Osage Plains
4 Polk Same Level IV ecoregion, within 10 miles Springfield Plateau
4 Ripley Same Level IV ecoregion, within 10 miles Current River Hills
4 Sainte Genevieve Same Level IV ecoregion, within 10 miles Eastern Ozark Border
4 Stoddard Same Level IV ecoregion, within 10 miles Black River Hills Border
4 Webster Same Level IV ecoregion, within 10 miles Central Plateau
6 Bollinger Same Level IV ecoregion, within 20 miles St. Francois Knobs and Basins
6 Buchanan Same Level IV ecoregion, within 20 miles Rolling Loess Prairies
6 Clinton Same Level IV ecoregion, within 20 miles Rolling Loess Prairies
6 Dade Same Level IV ecoregion, within 20 miles Springfield Plateau
6 Holt Same Level IV ecoregion, within 20 miles Steeply Rolling Loess Prairies
6 Howard Same Level IV ecoregion, within 20 miles Claypan Prairie
6 Howard Same Level IV ecoregion, within 20 miles River Hills
6 Lincoln Same Level IV ecoregion, within 20 miles River Hills
6 Newton Same Level IV ecoregion, within 20 miles Dissected Springfield Plateau-Elk River Hills
6 Nodaway Same Level IV ecoregion, within 20 miles Steeply Rolling Loess Prairies
6 Pike Same Level IV ecoregion, within 20 miles River Hills
6 Randolph Same Level IV ecoregion, within 20 miles Claypan Prairie
8 De Kalb Same Level IV ecoregion, within 30 miles Rolling Loess Prairies
8 Monroe Same Level IV ecoregion, within 30 miles Claypan Prairie
8 Pettis Same Level IV ecoregion, within 30 miles Prairie Ozark Border
8 Saint Charles Same Level IV ecoregion, within 30 miles River Hills
8 Saint Charles Same Level IV ecoregion, within 30 miles Middle Mississippi Alluvial Plain
10 Ray Same Level IV ecoregion, adjacent county Rolling Loess Prairies

Linnaean Classification

Kingdom:
Animalia - Animals
Phylum:
Chordata - Chordates
Subphylum:
Vertebrata - Vertebrates
Class:
Reptilia Laurenti, 1768 - Reptiles
Order:
Squamata Oppel, 1811 - Lizards and Snakes
Family:
Colubridae Oppel, 1811 - Harmless Egg-laying Snakes
Genus:
Pantherophis Fitzinger, 1843 - North American Ratsnakes
Species:
Pantherophis emoryi (Baird and Girard, 1853) - Great Plains Ratsnake

Recent Taxonomic Synonyms