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Nerodia rhombifer (Hallowell, 1852) - Diamond-backed Watersnake

Maps

Locality Map

Locality map for Nerodia rhombifer (Diamond-backed Watersnake)
Locality map for Nerodia rhombifer (Diamond-backed Watersnake).
Map created 6 March 2024.

County Map

County map for Nerodia rhombifer (Diamond-backed Watersnake)
County map for Nerodia rhombifer (Diamond-backed Watersnake).
Map created 6 March 2024.

Historical Locality Map

Historical locality map for Nerodia rhombifer (Diamond-backed Watersnake)
Historical locality map for Nerodia rhombifer (Diamond-backed Watersnake). 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 Nerodia rhombifer (Diamond-backed Watersnake)
Historical county map for Nerodia rhombifer (Diamond-backed Watersnake). 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 map for Nerodia rhombifer (Diamond-backed Watersnake)
Ecological Drainage Units locality map for Nerodia rhombifer (Diamond-backed Watersnake).
Map created 6 March 2024.

Natural Divisions Locality Map

Natural Divisions locality map for Nerodia rhombifer (Diamond-backed Watersnake)
Natural Divisions and Sections locality map for Nerodia rhombifer (Diamond-backed Watersnake).
Map created 6 March 2024.

Major Watersheds Locality Map

Major watersheds map for Nerodia rhombifer (Diamond-backed Watersnake)
Major Watersheds locality map for Nerodia rhombifer (Diamond-backed Watersnake).
Map created 6 March 2024.

Level I Ecoregion Locality Map

Level I Ecoregions map for Nerodia rhombifer (Diamond-backed Watersnake)
Level I Ecoregion locality map for Nerodia rhombifer (Diamond-backed Watersnake).
Map created 6 March 2024.

Level II Ecoregion Locality Map

Level II Ecoregions map for Nerodia rhombifer (Diamond-backed Watersnake)
Level II Ecoregion locality map for Nerodia rhombifer (Diamond-backed Watersnake).
Map created 6 March 2024.

Level III Ecoregion Locality Map

Level III Ecoregions map for Nerodia rhombifer (Diamond-backed Watersnake)
Level III Ecoregion locality map for Nerodia rhombifer (Diamond-backed Watersnake).
Map created 6 March 2024.

Level IV Ecoregion Locality Map

Level IV Ecoregions map for Nerodia rhombifer (Diamond-backed Watersnake)
Level IV Ecoregion locality map for Nerodia rhombifer (Diamond-backed Watersnake).
Map created 6 March 2024.

Native Status

Nerodia rhombifer (Diamond-backed Watersnake) is native to Missouri.

Collection Summary

Nerodia rhombifer (Diamond-backed Watersnake) has a total of 372 valid, non-duplicated collections representing 40 counties and 131 localities. There are a total of 58 collectors and 143 collection dates for the species. This results in a total of 156 expeditions for the species, a measure of unique date / collector(s) combinations. The earliest collection year for the species in Missouri is 1891 and its most recent collection year is 2023. 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

Collection summary for Nerodia rhombifer (Diamond-backed Watersnake) 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
Barton 2 69 2 2 2 1935 2018
Bates 1 1 1 1 1 1982 1982
Benton 1 1 1 1 1 1967 1967
Bollinger 7 14 10 12 12 1936 1995
Butler 3 10 7 7 8 1898 1970
Cape Girardeau 1 1 1 1 1 1962 1962
Carroll 3 3 3 3 3 1992 2015
Cass 1 1 2 1 1 2004 2004
Chariton 10 11 3 10 10 1938 2021
Clark 2 4 2 2 2 2013 2013
Clay 3 3 3 3 3 1965 1967
Dunklin 9 23 9 14 14 1904 1970
Grundy 2 2 1 2 2 1964 1964
Henry 1 1 1 1 1 1938 1938
Holt 11 32 8 25 26 1939 2023
Jackson 1 1 1 1 1 1943 1943
Jasper 3 4 4 4 4 1899 2022
Jefferson 2 2 1 1 1
Johnson 4 9 6 7 7 1960 1982
Lewis 1 1 1 1 1 1940 1940
Lincoln 2 2 2 2 2 2015 2015
Linn 1 1 1 1 1 1960 1960
Livingston 4 34 3 4 4 1940 2020
Macon 1 1 1 1 1 1962 1962
McDonald 1 2 1 1 1 1930 1930
Mississippi 11 41 6 8 9 1936 1984
New Madrid 2 2 2 2 2 1937 1961
Nodaway 2 2 2 2 2 1977 2012
Pemiscot 4 6 3 3 4 1923 1962
Perry 1 1 2 1 1 2016 2016
Pike 3 6 2 5 5 1992 2002
Ray 1 1 1 1 1 1994 1994
Ripley 1 2 1 1 1
Saint Charles 2 4 3 3 3 1906 1990
Saint Clair 1 1 1 1 1 1976 1976
Saint Louis 3 5 3 3 4 1891 1961
Scott 2 2 3 2 2 1962 2011
Stoddard 12 25 16 16 19 1939 2023
Vernon 6 38 4 8 8 1937 2016
Wayne 3 3 7 3 3 1966 2001

Potential County Records

Potential counties for Nerodia rhombifer (Diamond-backed Watersnake). 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 Caldwell Same Level IV ecoregion, within 5 miles Loess Flats and Till Plains
2 Daviess Same Level IV ecoregion, within 5 miles Loess Flats and Till Plains
2 Lafayette Same Level IV ecoregion, within 5 miles Missouri Alluvial Plain
2 Ralls Same Level IV ecoregion, within 5 miles River Hills
2 Sainte Genevieve Same Level IV ecoregion, within 5 miles Middle Mississippi Alluvial Plain
2 Sainte Genevieve Same Level IV ecoregion, within 5 miles Eastern Ozark Border
2 Saline Same Level IV ecoregion, within 5 miles Missouri Alluvial Plain
4 Andrew Same Level IV ecoregion, within 10 miles Steeply Rolling Loess Prairies
4 Andrew Same Level IV ecoregion, within 10 miles Rolling Loess Prairies
4 Andrew Same Level IV ecoregion, within 10 miles Missouri Alluvial Plain
4 Atchison Same Level IV ecoregion, within 10 miles Steeply Rolling Loess Prairies
4 Atchison Same Level IV ecoregion, within 10 miles Missouri Alluvial Plain
4 Cedar Same Level IV ecoregion, within 10 miles Cherokee Plains
4 Franklin Same Level IV ecoregion, within 10 miles Eastern Ozark Border
4 Harrison Same Level IV ecoregion, within 10 miles Loess Flats and Till Plains
4 Hickory Same Level IV ecoregion, within 10 miles Osage/Gasconade Hills
4 Newton Same Level IV ecoregion, within 10 miles Springfield Plateau
4 Platte Same Level IV ecoregion, within 10 miles Rolling Loess Prairies
4 Saint Francois Same Level IV ecoregion, within 10 miles Eastern Ozark Border
6 Adair Same Level IV ecoregion, within 20 miles Loess Flats and Till Plains
6 Camden Same Level IV ecoregion, within 20 miles Osage/Gasconade Hills
6 Clinton Same Level IV ecoregion, within 20 miles Rolling Loess Prairies
6 Dade Same Level IV ecoregion, within 20 miles Cherokee Plains
6 Howard Same Level IV ecoregion, within 20 miles Missouri Alluvial Plain
6 Marion Same Level IV ecoregion, within 20 miles Upper Mississippi Alluvial Plain
6 Marion Same Level IV ecoregion, within 20 miles River Hills
6 Mercer Same Level IV ecoregion, within 20 miles Loess Flats and Till Plains
6 Morgan Same Level IV ecoregion, within 20 miles Osage/Gasconade Hills
6 Pettis Same Level IV ecoregion, within 20 miles Wooded Osage Plains
6 Randolph Same Level IV ecoregion, within 20 miles Loess Flats and Till Plains
6 Sullivan Same Level IV ecoregion, within 20 miles Loess Flats and Till Plains
6 Worth Same Level IV ecoregion, within 20 miles Rolling Loess Prairies
7 Warren Same Level III ecoregion, within 20 miles Interior River Valleys and Hills
7 Washington Same Level III ecoregion, within 20 miles Ozark Highlands
8 Audrain Same Level IV ecoregion, within 30 miles River Hills
8 Barry Same Level IV ecoregion, within 30 miles Dissected Springfield Plateau-Elk River Hills
8 Buchanan Same Level IV ecoregion, within 30 miles Rolling Loess Prairies
8 Buchanan Same Level IV ecoregion, within 30 miles Missouri Alluvial Plain
8 Carter Same Level IV ecoregion, within 30 miles Black River Hills Border
8 Dallas Same Level IV ecoregion, within 30 miles Osage/Gasconade Hills
8 De Kalb Same Level IV ecoregion, within 30 miles Rolling Loess Prairies
8 De Kalb Same Level IV ecoregion, within 30 miles Loess Flats and Till Plains
8 Knox Same Level IV ecoregion, within 30 miles Loess Flats and Till Plains
8 Lawrence Same Level IV ecoregion, within 30 miles Springfield Plateau
8 Madison Same Level IV ecoregion, within 30 miles Black River Hills Border
8 Monroe Same Level IV ecoregion, within 30 miles River Hills
8 Montgomery Same Level IV ecoregion, within 30 miles River Hills
8 Polk Same Level IV ecoregion, within 30 miles Osage/Gasconade Hills
8 Putnam Same Level IV ecoregion, within 30 miles Loess Flats and Till Plains
8 Shelby Same Level IV ecoregion, within 30 miles Loess Flats and Till Plains
9 Cooper Same Level III ecoregion, within 30 miles Western Corn Belt Plains
9 Iron Same Level III ecoregion, within 30 miles Ozark Highlands
10 Gentry Same Level IV ecoregion, adjacent county Loess Flats and Till Plains
10 Scotland Same Level IV ecoregion, adjacent county Loess Flats and Till Plains
11 Oregon Same Level III ecoregion, adjacent county Ozark Highlands
11 Reynolds Same Level III ecoregion, adjacent county Ozark Highlands

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:
Natricidae Bonaparte, 1838 - Harmless Live-bearing Snakes
Genus:
Nerodia Baird and Girard, 1853 - North American Watersnakes
Species:
Nerodia rhombifer (Hallowell, 1852) - Diamond-backed Watersnake

Recent Taxonomic Synonyms

(none)