Maps
Locality Map
Locality map for Thamnophis sirtalis (Common Gartersnake).
Map created 8 April 2021.
County Map
County map for Thamnophis sirtalis (Common Gartersnake).
Map created 8 April 2021.
Historical Locality Map
Historical locality map for Thamnophis sirtalis (Common Gartersnake). 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 8 April 2021.
Historical County Map
Historical county map for Thamnophis sirtalis (Common Gartersnake). 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 8 April 2021.
Ecological Drainage Locality Map
Ecological Drainage Units locality map for Thamnophis sirtalis (Common Gartersnake).
Map created 8 April 2021.
Natural Divisions Locality Map
Natural Divisions and Sections locality map for Thamnophis sirtalis (Common Gartersnake).
Map created 8 April 2021.
Major Watersheds Locality Map
Major Watersheds locality map for Thamnophis sirtalis (Common Gartersnake).
Map created 8 April 2021.
Level I Ecoregion Locality Map
Level I Ecoregion locality map for Thamnophis sirtalis (Common Gartersnake).
Map created 8 April 2021.
Level II Ecoregion Locality Map
Level II Ecoregion locality map for Thamnophis sirtalis (Common Gartersnake).
Map created 8 April 2021.
Level III Ecoregion Locality Map
Level III Ecoregion locality map for Thamnophis sirtalis (Common Gartersnake).
Map created 8 April 2021.
Level IV Ecoregion Locality Map
Level IV Ecoregion locality map for Thamnophis sirtalis (Common Gartersnake).
Map created 8 April 2021.
Native Status
Thamnophis sirtalis (Common Gartersnake) is native to Missouri.
Collection Summary
Thamnophis sirtalis (Common Gartersnake) has a total of 730 valid, non-duplicated collections representing 114 counties and 507 localities. There are a total of 206 collectors and 467 collection dates for the species. This results in a total of 490 expeditions for the species, a measure of unique date / collector(s) combinations. The earliest collection year for the species in Missouri is 1884 and its most recent collection year is 2020. The earliest and latest collection dates (independent of earliest and most recent collection years) are January 2 and November 27, respectively. If you have a new record to report, read the New Records section of the FAQ.
Collection Summary by County
| County | Localities | Collections | Collectors | Dates | Expeditions | Earliest Year | Latest Year | |
|---|---|---|---|---|---|---|---|---|
 | Adair | 3 | 3 | 3 | 3 | 3 | 1971 | 2012 |
| Andrew | 3 | 3 | 4 | 3 | 3 | 1976 | 2017 |
| Atchison | 4 | 4 | 2 | 2 | 2 | 1977 | 2017 |
| Audrain | 6 | 7 | 2 | 6 | 6 | 1997 | 2013 |
| Barry | 4 | 9 | 5 | 7 | 7 | 1927 | 1968 |
| Barton | 13 | 13 | 11 | 9 | 10 | 1962 | 2020 |
| Bates | 5 | 5 | 3 | 5 | 5 | 1955 | 1976 |
| Benton | 4 | 5 | 3 | 4 | 4 | 1915 | 1968 |
| Bollinger | 1 | 1 | 5 | 1 | 1 | 2008 | 2008 |
| Boone | 9 | 14 | 7 | 11 | 12 | 1971 | 2008 |
| Buchanan | 3 | 10 | 2 | 3 | 3 | 1933 | 1947 |
| Butler | 3 | 6 | 3 | 5 | 5 | 1970 | 1995 |
| Caldwell | 7 | 7 | 2 | 3 | 3 | 1992 | 2017 |
| Callaway | 3 | 4 | 1 | 3 | 3 | 2000 | 2018 |
| Camden | 3 | 3 | 3 | 3 | 3 | 1972 | 2002 |
| Cape Girardeau | 4 | 4 | 4 | 4 | 4 | 1914 | 1995 |
| Carroll | 2 | 2 | 2 | 2 | 2 | 1982 | 2016 |
| Carter | 2 | 2 | 2 | 2 | 2 | 1989 | 1989 |
| Cass | 5 | 5 | 4 | 5 | 5 | 1956 | 2008 |
| Cedar | 2 | 2 | 1 | 2 | 2 | 2012 | 2017 |
| Chariton | 4 | 6 | 3 | 5 | 5 | 1999 | 2019 |
| Christian | 4 | 4 | 7 | 4 | 4 | 1967 | 2002 |
| Clark | 2 | 2 | 2 | 2 | 2 | 2013 | 2013 |
| Clay | 10 | 11 | 12 | 11 | 11 | 1939 | 1966 |
| Clinton | 2 | 3 | 2 | 2 | 2 | 1961 | 1967 |
| Cole | 2 | 2 | 3 | 2 | 2 | 1999 | 2020 |
| Cooper | 2 | 2 | 3 | 2 | 2 | 1992 | 2005 |
| Crawford | 2 | 6 | 3 | 5 | 6 | 1898 | 1965 |
| Dade | 3 | 3 | 5 | 3 | 3 | 1993 | 2006 |
| Dallas | 3 | 3 | 2 | 3 | 3 | 2004 | 2014 |
| Daviess | 3 | 3 | 1 | 1 | 1 | 2016 | 2016 |
| De Kalb | 3 | 3 | 2 | 2 | 2 | 1986 | 2016 |
| Dent | 2 | 4 | 4 | 4 | 4 | 1909 | 1941 |
| Douglas | 1 | 1 | 1 | 1 | 1 | 1973 | 1973 |
| Dunklin | 1 | 1 | 2 | 1 | 1 | 2008 | 2008 |
| Franklin | 5 | 6 | 7 | 5 | 5 | 1933 | 1971 |
| Gasconade | 1 | 1 | 1 | 1 | 1 | 1991 | 1991 |
| Gentry | 1 | 1 | 1 | 1 | 1 | 1983 | 1983 |
| Greene | 37 | 40 | 14 | 39 | 39 | 1960 | 2020 |
| Grundy | 6 | 8 | 5 | 8 | 8 | 1961 | 2009 |
| Harrison | 2 | 2 | 3 | 2 | 2 | 1983 | 1992 |
| Henry | 3 | 3 | 2 | 2 | 2 | 1982 | 2004 |
| Hickory | 6 | 6 | 6 | 5 | 5 | 1966 | 2006 |
| Holt | 12 | 52 | 10 | 28 | 29 | 1966 | 2020 |
| Howard | 4 | 4 | 3 | 4 | 4 | 1968 | 2020 |
| Howell | 3 | 3 | 4 | 2 | 3 | 1952 | 1983 |
| Iron | 3 | 3 | 5 | 3 | 3 | 1933 | 2007 |
| Jackson | 30 | 104 | 9 | 32 | 32 | 1908 | 2004 |
| Jasper | 2 | 3 | 3 | 3 | 3 | 1899 | 2019 |
| Jefferson | 5 | 10 | 6 | 7 | 8 | 1900 | 1964 |
| Johnson | 14 | 22 | 18 | 19 | 21 | 1949 | 1997 |
| Knox | 4 | 4 | 3 | 4 | 4 | 1992 | 2012 |
| Laclede | 1 | 2 | 3 | 2 | 2 | 2000 | 2000 |
| Lafayette | 3 | 3 | 3 | 3 | 3 | 1984 | 1997 |
| Lawrence | 4 | 4 | 4 | 4 | 4 | 1967 | 2018 |
| Lewis | 4 | 4 | 4 | 4 | 4 | 1986 | 2000 |
| Lincoln | 3 | 4 | 1 | 4 | 4 | 1978 | 2017 |
| Linn | 2 | 3 | 3 | 2 | 3 | 1984 | 1984 |
| Livingston | 4 | 4 | 2 | 4 | 4 | 1982 | 2017 |
| Macon | 4 | 4 | 4 | 4 | 4 | 1996 | 2017 |
| Madison | 5 | 9 | 5 | 4 | 4 | 1975 | 2007 |
| Maries | 3 | 3 | 3 | 3 | 3 | 1967 | 1982 |
| Marion | 4 | 10 | 4 | 9 | 9 | 1946 | 2018 |
| McDonald | 3 | 3 | 3 | 3 | 3 | 1930 | 1982 |
| Mercer | 1 | 1 | 1 | 1 | 1 | 1983 | 1983 |
| Miller | 4 | 4 | 4 | 4 | 4 | 1965 | 1982 |
| Mississippi | 2 | 2 | 2 | 2 | 2 | 1938 | 2007 |
| Moniteau | 2 | 2 | 3 | 2 | 2 | 1992 | 1996 |
| Monroe | 3 | 3 | 3 | 3 | 3 | 1999 | 2008 |
| Montgomery | 2 | 3 | 5 | 3 | 3 | 1907 | 2003 |
| Morgan | 2 | 2 | 2 | 2 | 2 | 1966 | 1966 |
| New Madrid | 1 | 1 | 2 | 1 | 1 | 1995 | 1995 |
| Newton | 8 | 10 | 12 | 6 | 6 | 1984 | 2018 |
| Nodaway | 4 | 4 | 6 | 3 | 4 | 1969 | 2019 |
| Oregon | 3 | 5 | 4 | 4 | 4 | 1900 | 1973 |
| Osage | 2 | 2 | 2 | 2 | 2 | 1992 | 2015 |
| Ozark | 1 | 2 | 2 | 2 | 2 | 1902 | 1902 |
| Pemiscot | 1 | 1 | 1 | 1 | 1 | 1938 | 1938 |
| Perry | 5 | 5 | 7 | 4 | 4 | 1994 | 2011 |
| Pettis | 9 | 9 | 4 | 8 | 8 | 1939 | 2015 |
| Phelps | 4 | 5 | 5 | 5 | 5 | 1900 | 2013 |
| Pike | 7 | 7 | 6 | 7 | 7 | 1948 | 2016 |
| Platte | 2 | 2 | 2 | 2 | 2 | 1962 | 1962 |
| Polk | 11 | 12 | 6 | 9 | 9 | 1973 | 2015 |
| Pulaski | 2 | 2 | 2 | 2 | 2 | 1929 | 1976 |
| Putnam | 1 | 1 | 1 | 1 | 1 | 2015 | 2015 |
| Ralls | 2 | 2 | 2 | 2 | 2 | 1997 | 2017 |
| Randolph | 7 | 7 | 3 | 7 | 7 | 1983 | 2007 |
| Ray | 2 | 2 | 2 | 2 | 2 | 1960 | 1960 |
| Reynolds | 3 | 3 | 4 | 3 | 3 | 1964 | 1997 |
| Ripley | 2 | 2 | 4 | 2 | 2 | 2006 | 2007 |
| Saint Charles | 24 | 29 | 12 | 24 | 25 | 1929 | 1993 |
| Saint Clair | 7 | 15 | 9 | 9 | 9 | 1936 | 2007 |
| Sainte Genevieve | 1 | 1 | 3 | 1 | 1 | 2004 | 2004 |
| Saint Francois | 3 | 3 | 5 | 2 | 3 | 1929 | 2008 |
| Saint Louis | 8 | 20 | 6 | 13 | 14 | 1884 | 1971 |
| Saline | 2 | 2 | 3 | 2 | 2 | 1992 | 2004 |
| Schuyler | 3 | 3 | 2 | 3 | 3 | 1985 | 2015 |
| Scotland | 4 | 4 | 3 | 4 | 4 | 1986 | 2004 |
| Scott | 4 | 4 | 4 | 3 | 3 | 2007 | 2011 |
| Shannon | 3 | 4 | 3 | 4 | 4 | 1963 | 1977 |
| Shelby | 1 | 1 | 1 | 1 | 1 | 1997 | 1997 |
| Stoddard | 4 | 4 | 5 | 4 | 4 | 1969 | 2005 |
| Stone | 5 | 10 | 5 | 6 | 6 | 1892 | 2005 |
| Sullivan | 4 | 4 | 3 | 4 | 4 | 2005 | 2012 |
| Taney | 3 | 3 | 4 | 2 | 2 | 2008 | 2014 |
| Texas | 9 | 9 | 10 | 6 | 6 | 1977 | 2004 |
| Vernon | 2 | 2 | 1 | 2 | 2 | 1976 | 1987 |
| Warren | 3 | 3 | 4 | 3 | 3 | 2001 | 2009 |
| Washington | 3 | 4 | 5 | 4 | 4 | 1942 | 1992 |
| Wayne | 5 | 6 | 4 | 4 | 4 | 1937 | 2010 |
| Webster | 4 | 4 | 3 | 3 | 4 | 2001 | 2005 |
| Worth | 1 | 1 | 1 | 1 | 1 | 1961 | 1961 |
| Wright | 2 | 2 | 2 | 2 | 2 | 1960 | 2003 |
Potential County Records
There are no potential county records for this species as it has been verified in every Missouri county.