Maps
Locality Map
Locality map for Tantilla gracilis (Flat-headed Snake).
Map created 3 August 2022.
County Map
County map for Tantilla gracilis (Flat-headed Snake).
Map created 3 August 2022.
Historical Locality Map
Historical locality map for Tantilla gracilis (Flat-headed 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 3 August 2022.
Historical County Map
Historical county map for Tantilla gracilis (Flat-headed 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 3 August 2022.
Ecological Drainage Locality Map
Ecological Drainage Units locality map for Tantilla gracilis (Flat-headed Snake).
Map created 3 August 2022.
Natural Divisions Locality Map
Natural Divisions and Sections locality map for Tantilla gracilis (Flat-headed Snake).
Map created 3 August 2022.
Major Watersheds Locality Map
Major Watersheds locality map for Tantilla gracilis (Flat-headed Snake).
Map created 3 August 2022.
Level I Ecoregion Locality Map
Level I Ecoregion locality map for Tantilla gracilis (Flat-headed Snake).
Map created 3 August 2022.
Level II Ecoregion Locality Map
Level II Ecoregion locality map for Tantilla gracilis (Flat-headed Snake).
Map created 3 August 2022.
Level III Ecoregion Locality Map
Level III Ecoregion locality map for Tantilla gracilis (Flat-headed Snake).
Map created 3 August 2022.
Level IV Ecoregion Locality Map
Level IV Ecoregion locality map for Tantilla gracilis (Flat-headed Snake).
Map created 3 August 2022.
Native Status
Tantilla gracilis (Flat-headed Snake) is native to Missouri.
Collection Summary
Tantilla gracilis (Flat-headed Snake) has a total of 406 valid, non-duplicated collections representing 44 counties and 155 localities. There are a total of 110 collectors and 152 collection dates for the species. This results in a total of 179 expeditions for the species, a measure of unique date / collector(s) combinations. The earliest collection year for the species in Missouri is 1892 and its most recent collection year is 2017. The earliest and latest collection dates (independent of earliest and most recent collection years) are March 7 and October 24, 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 | |
---|---|---|---|---|---|---|---|---|
![]() | Barry | 11 | 28 | 6 | 9 | 9 | 1930 | 1976 |
![]() | Benton | 7 | 46 | 5 | 7 | 7 | 1958 | 2012 |
![]() | Camden | 4 | 5 | 3 | 4 | 5 | 1948 | 1978 |
![]() | Carter | 2 | 2 | 4 | 2 | 2 | 2002 | 2005 |
![]() | Christian | 5 | 6 | 9 | 6 | 6 | 1962 | 1993 |
![]() | Crawford | 1 | 1 | 1 | 1 | 1 | 1965 | 1965 |
![]() | Dade | 2 | 2 | 1 | 2 | 2 | 1985 | 1993 |
![]() | Dallas | 1 | 1 | 2 | 1 | 1 | 2000 | 2000 |
![]() | Dent | 1 | 1 | 2 | 1 | 1 | 2003 | 2003 |
![]() | Franklin | 1 | 2 | 1 | 1 | 1 | 1934 | 1934 |
![]() | Gasconade | 1 | 1 | 1 | 1 | 1 | ||
![]() | Greene | 5 | 29 | 6 | 7 | 7 | 1959 | 2013 |
![]() | Henry | 2 | 2 | 2 | 2 | 2 | 1982 | 1982 |
![]() | Hickory | 1 | 1 | 1 | 1 | 1 | 1985 | 1985 |
![]() | Iron | 4 | 4 | 5 | 3 | 3 | 1962 | 2009 |
![]() | Jackson | 2 | 3 | 1 | 2 | 2 | 1938 | 1938 |
![]() | Jasper | 1 | 1 | 1 | 1 | 1 | 2003 | 2003 |
![]() | Jefferson | 16 | 58 | 26 | 20 | 33 | 1895 | 1987 |
![]() | Laclede | 1 | 2 | 1 | 1 | 1 | 1939 | 1939 |
![]() | Madison | 2 | 2 | 7 | 2 | 2 | 2007 | 2007 |
![]() | Maries | 1 | 1 | 1 | 1 | 1 | 2000 | 2000 |
![]() | McDonald | 5 | 8 | 4 | 6 | 6 | 1937 | 1978 |
![]() | Miller | 2 | 3 | 2 | 3 | 3 | 1965 | 1973 |
![]() | Moniteau | 2 | 3 | 4 | 2 | 2 | 1966 | 2012 |
![]() | Montgomery | 3 | 4 | 6 | 3 | 4 | 1992 | 2015 |
![]() | Morgan | 1 | 6 | 1 | 1 | 1 | 1963 | 1963 |
![]() | Newton | 1 | 2 | 1 | 1 | 1 | 1958 | 1958 |
![]() | Oregon | 2 | 2 | 3 | 2 | 2 | 1956 | 2006 |
![]() | Osage | 2 | 2 | 4 | 2 | 2 | 1982 | 1999 |
![]() | Ozark | 5 | 10 | 8 | 7 | 8 | 1892 | 2017 |
![]() | Phelps | 3 | 15 | 7 | 5 | 8 | 1945 | 1982 |
![]() | Pulaski | 4 | 14 | 4 | 3 | 4 | 1959 | 1976 |
![]() | Reynolds | 1 | 2 | 2 | 1 | 2 | 1963 | 1963 |
![]() | Saint Clair | 11 | 76 | 16 | 15 | 16 | 1938 | 2007 |
![]() | Saint Louis | 6 | 10 | 5 | 6 | 6 | 1892 | 1965 |
![]() | Shannon | 4 | 6 | 5 | 4 | 4 | 1950 | 2002 |
![]() | Stone | 8 | 13 | 10 | 8 | 8 | 1892 | 2012 |
![]() | Taney | 16 | 23 | 13 | 19 | 19 | 1946 | 2007 |
![]() | Texas | 1 | 1 | 1 | 1 | 1 | 1976 | 1976 |
![]() | Vernon | 1 | 1 | 1 | 1 | 1 | ||
![]() | Warren | 1 | 1 | 2 | 1 | 1 | 2010 | 2010 |
![]() | Washington | 1 | 1 | 1 | 1 | 1 | 1965 | 1965 |
![]() | Wayne | 2 | 3 | 4 | 3 | 3 | 1940 | 1964 |
![]() | Wright | 1 | 1 | 1 | 1 | 1 | 1961 | 1961 |
Potential County Records
Likelihood | County | Rationale | Ecoregion / Watershed | |
---|---|---|---|---|
![]() | 2 | Bates | Same Level IV ecoregion, within 5 miles | Cherokee Plains |
![]() | 2 | Callaway | Same Level IV ecoregion, within 5 miles | River Hills |
![]() | 2 | Cedar | Same Level IV ecoregion, within 5 miles | Springfield Plateau |
![]() | 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 | Howell | Same Level IV ecoregion, within 5 miles | White River Hills |
![]() | 2 | Lawrence | Same Level IV ecoregion, within 5 miles | Springfield Plateau |
![]() | 2 | Polk | Same Level IV ecoregion, within 5 miles | Osage/Gasconade Hills |
![]() | 2 | Saint Charles | Same Level IV ecoregion, within 5 miles | River Hills |
![]() | 2 | Sainte Genevieve | Same Level IV ecoregion, within 5 miles | Eastern Ozark Border |
![]() | 2 | Sainte Genevieve | Same Level IV ecoregion, within 5 miles | River Hills |
![]() | 2 | Saint Francois | Same Level IV ecoregion, within 5 miles | St. Francois Knobs and Basins |
![]() | 2 | Saint Francois | Same Level IV ecoregion, within 5 miles | Eastern Ozark Border |
![]() | 2 | Saint Francois | Same Level IV ecoregion, within 5 miles | Meramec River Hills |
![]() | 3 | Clay | Same Level III ecoregion, within 5 miles | Western Corn Belt Plains |
![]() | 3 | Platte | Same Level III ecoregion, within 5 miles | Western Corn Belt Plains |
![]() | 4 | Webster | Same Level IV ecoregion, within 10 miles | Central Plateau |
![]() | 6 | Audrain | Same Level IV ecoregion, within 20 miles | River Hills |
![]() | 6 | Barton | Same Level IV ecoregion, within 20 miles | Springfield Plateau |
![]() | 6 | Bollinger | Same Level IV ecoregion, within 20 miles | St. Francois Knobs and Basins |
![]() | 6 | Lincoln | Same Level IV ecoregion, within 20 miles | River Hills |
![]() | 6 | Pettis | Same Level IV ecoregion, within 20 miles | Cherokee Plains |
![]() | 6 | Pike | Same Level IV ecoregion, within 20 miles | River Hills |
![]() | 6 | Ripley | Same Level IV ecoregion, within 20 miles | Current River Hills |
![]() | 6 | Ripley | Same Level IV ecoregion, within 20 miles | Central Plateau |
![]() | 7 | Johnson | Same Level III ecoregion, within 20 miles | Central Irregular Plains |
![]() | 7 | Perry | Same Level III ecoregion, within 20 miles | Ozark Highlands |
![]() | 8 | Boone | Same Level IV ecoregion, within 30 miles | River Hills |
![]() | 8 | Butler | Same Level IV ecoregion, within 30 miles | Current River Hills |
![]() | 8 | Lafayette | Same Level IV ecoregion, within 30 miles | Rolling Loess Prairies |
![]() | 8 | Ray | Same Level IV ecoregion, within 30 miles | Rolling Loess Prairies |
![]() | 9 | Buchanan | Same Level III ecoregion, within 30 miles | Western Corn Belt Plains |
![]() | 9 | Cape Girardeau | Same Level III ecoregion, within 30 miles | Ozark Highlands |
![]() | 9 | Cass | Same Level III ecoregion, within 30 miles | Central Irregular Plains |
![]() | 9 | Clinton | Same Level III ecoregion, within 30 miles | Western Corn Belt Plains |
![]() | 9 | Stoddard | Same Level III ecoregion, within 30 miles | Ozark Highlands |
![]() | 10 | Cooper | Same Level IV ecoregion, adjacent county | River Hills |
![]() | 10 | Cooper | 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
- Suborder:
- Serpentes Linnaeus, 1758 - Snakes
- Family:
- Colubridae Oppel, 1811 - Typical Harmless Snakes
- Genus:
- Tantilla Baird and Girard, 1853 - Black-headed, Crowned, and Flat-headed Snakes
- Species:
- Tantilla gracilis Baird and Girard, 1853 - Flat-headed Snake
Recent Taxonomic Synonyms
(none)