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Regina grahamii Baird and Girard, 1853 - Graham's Crawfish Snake

Maps

Locality Map

Locality map for Regina grahamii (Graham
Locality map for Regina grahamii (Graham's Crawfish Snake).
Map created 15 April 2026.

County Map

County map for Regina grahamii (Graham
County map for Regina grahamii (Graham's Crawfish Snake).
Map created 15 April 2026.

Historical Locality Map

Historical locality map for Regina grahamii (Graham
Historical locality map for Regina grahamii (Graham's Crawfish Snake). 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 Regina grahamii (Graham
Historical county map for Regina grahamii (Graham's Crawfish Snake). 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 Regina grahamii (Graham
Ecological Drainage Units locality map for Regina grahamii (Graham's Crawfish Snake).
Map created 15 April 2026.

Natural Divisions Locality Map

Natural Divisions locality map for Regina grahamii (Graham
Natural Divisions and Sections locality map for Regina grahamii (Graham's Crawfish Snake).
Map created 15 April 2026.

Major Watersheds Locality Map

Major watersheds map for Regina grahamii (Graham
Major Watersheds locality map for Regina grahamii (Graham's Crawfish Snake).
Map created 15 April 2026.

Level I Ecoregion Locality Map

Level I Ecoregions map for Regina grahamii (Graham
Level I Ecoregion locality map for Regina grahamii (Graham's Crawfish Snake).
Map created 15 April 2026.

Level II Ecoregion Locality Map

Level II Ecoregions map for Regina grahamii (Graham
Level II Ecoregion locality map for Regina grahamii (Graham's Crawfish Snake).
Map created 15 April 2026.

Level III Ecoregion Locality Map

Level III Ecoregions map for Regina grahamii (Graham
Level III Ecoregion locality map for Regina grahamii (Graham's Crawfish Snake).
Map created 15 April 2026.

Level IV Ecoregion Locality Map

Level IV Ecoregions map for Regina grahamii (Graham
Level IV Ecoregion locality map for Regina grahamii (Graham's Crawfish Snake).
Map created 15 April 2026.

Native Status

Regina grahamii (Graham's Crawfish Snake) is native to Missouri.

Collection Summary

Regina grahamii (Graham's Crawfish Snake) has a total of 231 valid, non-duplicated collections representing 37 counties and 108 localities. There are a total of 44 collectors and 93 collection dates for the species. This results in a total of 103 expeditions for the species, a measure of unique date / collector(s) combinations. The earliest collection year for the species in Missouri is 1897 and its most recent collection year is 2025. The earliest and latest collection dates (independent of earliest and most recent collection years) are April 1 and December 7, respectively. If you have a new record to report, read the New Records section of the FAQ.

Collection Summary by County

Collection summary for Regina grahamii (Graham's Crawfish Snake) 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
Adair 1 1 1 1 1 1960 1960
Andrew 1 1 1 1 1 1977 1977
Barton 2 2 2 2 2 1982 2016
Bates 1 1 2 1 1 1992 1992
Buchanan 2 2 2 2 2 2002 2002
Caldwell 1 1 1 1 1 2017 2017
Cass 3 4 3 3 3 1934 2008
Chariton 5 5 1 5 5 2012 2025
Clark 5 8 2 5 5 1979 1990
Dunklin 1 2 2 2 2 1936 1936
Gentry 1 15 3 4 4 2001 2007
Grundy 1 1 1 1 1 2010 2010
Henry 1 1 1 1 1 1979 1979
Holt 16 26 7 21 23 1939 2025
Jackson 24 78 6 12 14 1928 1978
Jasper 2 4 3 3 4 1906 2021
Jefferson 2 3 1 1 1
Johnson 3 5 4 4 4 1917 1984
Knox 1 1 1 1 1 1986 1986
Lewis 1 1 1 1 1 1996 1996
Lincoln 2 23 2 2 2 2004 2004
Linn 1 2 1 2 2 1980 1984
Livingston 3 4 4 3 3 1940 2010
Macon 1 1 1 1 1 1992 1992
Marion 3 4 1 3 3 1947 1947
Mercer 1 1 1 1 1 2019 2019
Newton 1 1 4 1 1 2023 2023
Nodaway 4 5 1 4 4 1965 1970
Pettis 2 2 2 2 2 1967 2014
Pike 2 5 2 3 3 1992 2010
Platte 1 1 2 1 1 1992 1992
Saint Charles 4 6 6 6 6 1900 2010
Saint Louis 4 9 4 3 5 1897 1933
Saline 1 1 2 1 1 2022 2022
Schuyler 1 1 1 1 1 1985 1985
Scotland 1 1 1 1 1 1986 1986
Shelby 1 1 1 1 1 1998 1998

Potential County Records

Potential counties for Regina grahamii (Graham's Crawfish Snake). 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 Carroll Same watershed, within 5 miles Lower Grand
2 Clay Same watershed, within 5 miles Lower Missouri-Crooked
2 Daviess Same watershed, within 5 miles Upper Grand
2 Lafayette Same watershed, within 5 miles Lower Missouri-Crooked
2 Lafayette Same watershed, within 5 miles Blackwater
2 Pemiscot Same watershed, within 5 miles Little River Ditches
2 Ralls Same watershed, within 5 miles Salt
4 Atchison Same watershed, within 10 miles Tarkio-Wolf
4 Benton Same watershed, within 10 miles Lamine
4 Franklin Same watershed, within 10 miles Meramec
4 Harrison Same watershed, within 10 miles Thompson
4 Harrison Same watershed, within 10 miles Upper Grand
4 Monroe Same watershed, within 10 miles North Fork Salt
4 Ray Same watershed, within 10 miles Lower Missouri-Crooked
4 Saint Clair Same watershed, within 10 miles South Grand
4 Vernon Same watershed, within 10 miles Marmaton
6 Barry Same watershed, within 20 miles Spring
6 Cooper Same watershed, within 20 miles Lamine
6 Dade Same watershed, within 20 miles Spring
6 De Kalb Same watershed, within 20 miles Upper Grand
6 Lawrence Same watershed, within 20 miles Spring
6 Montgomery Same watershed, within 20 miles Cuivre
6 Morgan Same watershed, within 20 miles Lamine
6 New Madrid Same watershed, within 20 miles Little River Ditches
6 Putnam Same watershed, within 20 miles Lower Chariton
6 Randolph Same watershed, within 20 miles Little Chariton
6 Sullivan Same watershed, within 20 miles Lower Chariton
6 Sullivan Same watershed, within 20 miles Lower Grand
6 Warren Same watershed, within 20 miles Peruque-Piasa
6 Warren Same watershed, within 20 miles Cuivre
6 Worth Same watershed, within 20 miles Upper Grand
8 Audrain Same watershed, within 30 miles Cuivre
8 Audrain Same watershed, within 30 miles Salt
8 Clinton Same watershed, within 30 miles Upper Grand
8 Clinton Same watershed, within 30 miles Lower Missouri-Crooked
8 Moniteau Same watershed, within 30 miles Lamine
8 Stoddard Same watershed, within 30 miles Little River Ditches
8 Washington Same watershed, within 30 miles Meramec
10 Howard Adjacent county, same watershed Little Chariton
10 Sainte Genevieve Adjacent county, same watershed Cahokia-Joachim
10 Saint Francois Adjacent county, same watershed Cahokia-Joachim

Linnaean Classification

Kingdom:
Animalia - Animals
Phylum:
Chordata - Chordates
Subphylum:
Vertebrata - Vertebrates
Class:
Reptilia Laurenti, 1768 - Reptiles
Order:
Squamata Oppel, 1811 - Lizards and Snakes
Family:
Natricidae Bonaparte, 1838 - Harmless Egg-retaining Snakes
Genus:
Regina Baird and Girard, 1853 - Crawfish Snakes
Species:
Regina grahamii Baird and Girard, 1853 - Graham's Crawfish Snake

Recent Taxonomic Synonyms

(none)