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Pituophis catenifer (Blainville, 1835) - Bullsnake

Maps

Locality Map

Locality map for Pituophis catenifer (Bullsnake)
Locality map for Pituophis catenifer (Bullsnake).
Map created 15 April 2026.

County Map

County map for Pituophis catenifer (Bullsnake)
County map for Pituophis catenifer (Bullsnake).
Map created 15 April 2026.

Historical Locality Map

Historical locality map for Pituophis catenifer (Bullsnake)
Historical locality map for Pituophis catenifer (Bullsnake). 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 Pituophis catenifer (Bullsnake)
Historical county map for Pituophis catenifer (Bullsnake). 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 Pituophis catenifer (Bullsnake)
Ecological Drainage Units locality map for Pituophis catenifer (Bullsnake).
Map created 15 April 2026.

Natural Divisions Locality Map

Natural Divisions locality map for Pituophis catenifer (Bullsnake)
Natural Divisions and Sections locality map for Pituophis catenifer (Bullsnake).
Map created 15 April 2026.

Major Watersheds Locality Map

Major watersheds map for Pituophis catenifer (Bullsnake)
Major Watersheds locality map for Pituophis catenifer (Bullsnake).
Map created 15 April 2026.

Level I Ecoregion Locality Map

Level I Ecoregions map for Pituophis catenifer (Bullsnake)
Level I Ecoregion locality map for Pituophis catenifer (Bullsnake).
Map created 15 April 2026.

Level II Ecoregion Locality Map

Level II Ecoregions map for Pituophis catenifer (Bullsnake)
Level II Ecoregion locality map for Pituophis catenifer (Bullsnake).
Map created 15 April 2026.

Level III Ecoregion Locality Map

Level III Ecoregions map for Pituophis catenifer (Bullsnake)
Level III Ecoregion locality map for Pituophis catenifer (Bullsnake).
Map created 15 April 2026.

Level IV Ecoregion Locality Map

Level IV Ecoregions map for Pituophis catenifer (Bullsnake)
Level IV Ecoregion locality map for Pituophis catenifer (Bullsnake).
Map created 15 April 2026.

Native Status

Pituophis catenifer (Bullsnake) is native to Missouri.

Collection Summary

Pituophis catenifer (Bullsnake) has a total of 119 valid, non-duplicated collections representing 34 counties and 105 localities. There are a total of 47 collectors and 88 collection dates for the species. This results in a total of 89 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 2025. The earliest and latest collection dates (independent of earliest and most recent collection years) are April 1 and November 15, respectively. If you have a new record to report, read the New Records section of the FAQ.

Collection Summary by County

Collection summary for Pituophis catenifer (Bullsnake) 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
Andrew 1 1 1 1 1 2020 2020
Atchison 2 2 2 2 2 1977 2016
Barry 2 2 3 2 2 1952 1964
Barton 7 7 4 6 6 1936 2021
Bates 2 2 2 2 2 1962 2007
Boone 1 1 1 1 1 1946 1946
Buchanan 3 3 3 3 3 1940 1957
Cass 3 3 2 3 3 1940 1961
Cedar 1 1 1 1 1 2023 2023
Clark 2 2 2 2 2 2013 2025
Dade 5 5 4 5 5 1999 2017
Gentry 1 2 1 1 1 1969 1969
Greene 19 23 11 20 20 1959 2023
Harrison 2 2 2 2 2 1941 1970
Henry 1 1 1 1 1 1959 1959
Holt 7 7 4 5 5 1965 2022
Jackson 5 6 3 5 5 1938 1978
Jasper 7 8 7 6 7 1899 2002
Lafayette 1 1 2 1 1 1992 1992
Lawrence 3 3 4 3 3 1962 2013
Newton 4 4 6 4 4 2002 2021
Nodaway 3 7 2 3 3 1937 1981
Phelps 1 2 1 1 1
Polk 2 2 4 2 2 1959 2006
Ray 1 1 2 1 1 1992 1992
Reynolds 2 2 3 2 2 2023 2023
Saint Charles 2 2 2 2 2 1935 1935
Saint Clair 2 2 2 2 2 1974 1974
Saint Louis 3 3 2 2 2 2013 2013
Saline 2 2 2 2 2 1934 1934
Stone 1 2 2 2 2 1907 1907
Taney 1 2 1 1 1
Vernon 5 5 3 5 5 1937 1964
Wright 1 1 1 1 1 1961 1961

Potential County Records

Potential counties for Pituophis catenifer (Bullsnake). 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 Level IV ecoregion, within 5 miles Rolling Loess Prairies
2 Carroll Same Level IV ecoregion, within 5 miles Missouri Alluvial Plain
2 Christian Same Level IV ecoregion, within 5 miles Springfield Plateau
2 Iron Same Level IV ecoregion, within 5 miles St. Francois Knobs and Basins
2 McDonald Same Level IV ecoregion, within 5 miles Springfield Plateau
2 Platte Same Level IV ecoregion, within 5 miles Missouri Alluvial Plain
2 Worth Same Level IV ecoregion, within 5 miles Loess Flats and Till Plains
4 Audrain Same Level IV ecoregion, within 10 miles Claypan Prairie
4 Callaway Same Level IV ecoregion, within 10 miles Claypan Prairie
4 Chariton Same Level IV ecoregion, within 10 miles Rolling Loess Prairies
4 Dent Same Level IV ecoregion, within 10 miles Current River Hills
4 Franklin Same Level IV ecoregion, within 10 miles River Hills
4 Johnson Same Level IV ecoregion, within 10 miles Wooded Osage Plains
4 Shannon Same Level IV ecoregion, within 10 miles Current River Hills
4 Webster Same Level IV ecoregion, within 10 miles Central Plateau
4 Webster Same Level IV ecoregion, within 10 miles Springfield Plateau
5 Clay Same Level III ecoregion, within 10 miles Western Corn Belt Plains
6 Benton Same Level IV ecoregion, within 20 miles Cherokee Plains
6 Clinton Same Level IV ecoregion, within 20 miles Rolling Loess Prairies
6 De Kalb Same Level IV ecoregion, within 20 miles Loess Flats and Till Plains
6 De Kalb Same Level IV ecoregion, within 20 miles Rolling Loess Prairies
6 Grundy Same Level IV ecoregion, within 20 miles Loess Flats and Till Plains
6 Hickory Same Level IV ecoregion, within 20 miles Springfield Plateau
6 Howard Same Level IV ecoregion, within 20 miles Claypan Prairie
6 Laclede Same Level IV ecoregion, within 20 miles Central Plateau
6 Lewis Same Level IV ecoregion, within 20 miles Upper Mississippi Alluvial Plain
6 Lincoln Same Level IV ecoregion, within 20 miles River Hills
6 Lincoln Same Level IV ecoregion, within 20 miles Upper Mississippi Alluvial Plain
6 Madison Same Level IV ecoregion, within 20 miles St. Francois Knobs and Basins
6 Mercer Same Level IV ecoregion, within 20 miles Loess Flats and Till Plains
6 Randolph Same Level IV ecoregion, within 20 miles Claypan Prairie
6 Saint Francois Same Level IV ecoregion, within 20 miles St. Francois Knobs and Basins
6 Texas Same Level IV ecoregion, within 20 miles Central Plateau
6 Warren Same Level IV ecoregion, within 20 miles River Hills
6 Washington Same Level IV ecoregion, within 20 miles St. Francois Knobs and Basins
6 Wayne Same Level IV ecoregion, within 20 miles Current River Hills
6 Wayne Same Level IV ecoregion, within 20 miles St. Francois Knobs and Basins
7 Crawford Same Level III ecoregion, within 20 miles Ozark Highlands
7 Dallas Same Level III ecoregion, within 20 miles Ozark Highlands
7 Douglas Same Level III ecoregion, within 20 miles Ozark Highlands
7 Jefferson Same Level III ecoregion, within 20 miles Interior River Valleys and Hills
8 Carter Same Level IV ecoregion, within 30 miles Current River Hills
8 Cooper Same Level IV ecoregion, within 30 miles Rolling Loess Prairies
8 Daviess Same Level IV ecoregion, within 30 miles Loess Flats and Till Plains
8 Howell Same Level IV ecoregion, within 30 miles Central Plateau
8 Monroe Same Level IV ecoregion, within 30 miles Claypan Prairie
8 Pettis Same Level IV ecoregion, within 30 miles Cherokee Plains
8 Pettis Same Level IV ecoregion, within 30 miles Rolling Loess Prairies
8 Pike Same Level IV ecoregion, within 30 miles Upper Mississippi Alluvial Plain
8 Pulaski Same Level IV ecoregion, within 30 miles Central Plateau
10 Caldwell Same Level IV ecoregion, adjacent county Loess Flats and Till Plains
10 Cole Same Level IV ecoregion, adjacent county River Hills
10 Gasconade Same Level IV ecoregion, adjacent county River Hills
10 Gasconade Same Level IV ecoregion, adjacent county Central Plateau
10 Knox Same Level IV ecoregion, adjacent county Loess Flats and Till Plains
10 Knox Same Level IV ecoregion, adjacent county Claypan Prairie
10 Maries Same Level IV ecoregion, adjacent county Central Plateau
10 Moniteau Same Level IV ecoregion, adjacent county River Hills
10 Ozark Same Level IV ecoregion, adjacent county Central Plateau
10 Scotland Same Level IV ecoregion, adjacent county Loess Flats and Till Plains

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:
Pituophis Holbrook, 1842 - Bullsnakes
Species:
Pituophis catenifer (Blainville, 1835) - Bullsnake

Recent Taxonomic Synonyms

(none)