Maps
Locality Map
Locality map for Heterodon nasicus (Plains Hog-nosed Snake).
Map created 6 March 2024.
County Map
County map for Heterodon nasicus (Plains Hog-nosed Snake).
Map created 6 March 2024.
Historical Locality Map
Historical locality map for Heterodon nasicus (Plains Hog-nosed 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 6 March 2024.
Historical County Map
Historical county map for Heterodon nasicus (Plains Hog-nosed 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 6 March 2024.
Ecological Drainage Locality Map
Ecological Drainage Units locality map for Heterodon nasicus (Plains Hog-nosed Snake).
Map created 6 March 2024.
Natural Divisions Locality Map
Natural Divisions and Sections locality map for Heterodon nasicus (Plains Hog-nosed Snake).
Map created 6 March 2024.
Major Watersheds Locality Map
Major Watersheds locality map for Heterodon nasicus (Plains Hog-nosed Snake).
Map created 6 March 2024.
Level I Ecoregion Locality Map
Level I Ecoregion locality map for Heterodon nasicus (Plains Hog-nosed Snake).
Map created 6 March 2024.
Level II Ecoregion Locality Map
Level II Ecoregion locality map for Heterodon nasicus (Plains Hog-nosed Snake).
Map created 6 March 2024.
Level III Ecoregion Locality Map
Level III Ecoregion locality map for Heterodon nasicus (Plains Hog-nosed Snake).
Map created 6 March 2024.
Level IV Ecoregion Locality Map
Level IV Ecoregion locality map for Heterodon nasicus (Plains Hog-nosed Snake).
Map created 6 March 2024.
Native Status
Heterodon nasicus (Plains Hog-nosed Snake) is native to Missouri.
Collection Summary
Heterodon nasicus (Plains Hog-nosed Snake) has a total of 5 valid, non-duplicated collections representing 1 counties and 3 localities. There are a total of 2 collectors and 3 collection dates for the species. This results in a total of 3 expeditions for the species, a measure of unique date / collector(s) combinations. The earliest collection year for the species in Missouri is 1942 and its most recent collection year is 1969. The earliest and latest collection dates (independent of earliest and most recent collection years) are September 26 and October 11, 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 | |
|---|---|---|---|---|---|---|---|---|
 | Holt | 3 | 5 | 2 | 3 | 3 | 1942 | 1969 |
Potential County Records
| Likelihood | County | Rationale | Ecoregion / Watershed | |
|---|---|---|---|---|
 | 2 | Atchison | Same Level IV ecoregion, within 5 miles | Missouri Alluvial Plain |
 | 6 | Andrew | Same Level IV ecoregion, within 20 miles | Missouri Alluvial Plain |
| 7 | Nodaway | Same Level III ecoregion, within 20 miles | Western Corn Belt Plains |
 | 8 | Buchanan | Same Level IV ecoregion, within 30 miles | Missouri Alluvial Plain |
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:
- Dipsadidae Bonaparte, 1838 - Slender and Robust Rear-fanged Snakes
- Genus:
- Heterodon Latreille, 1801 - North American Hog-nosed Snakes
- Species:
- Heterodon nasicus Baird and Girard, 1852 - Plains Hog-nosed Snake
Recent Taxonomic Synonyms
(none)