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


Collection Summary

Nerodia rhombifer (Diamond-backed Watersnake) has a total of 348 valid, non-duplicated collections representing 39 counties and 118 localities. There are a total of 50 collectors and 128 collection dates for the species. This results in a total of 138 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 2018. The earliest and latest collection dates (independent of earliest and most recent collection years) are March 7 and October 19, 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 13 9 11 11 1936 1995
Butler 3 7 4 6 6 1898 1962
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 9 10 3 9 9 1938 2016
Clark 2 4 2 2 2 2013 2013
Clay 3 3 3 3 3 1965 1967
Dunklin 8 21 7 12 12 1904 1970
Grundy 2 2 1 2 2 1964 1964
Henry 1 1 1 1 1 1938 1938
Holt 8 27 6 20 21 1939 2017
Jackson 1 1 1 1 1 1943 1943
Jasper 2 3 3 3 3 1899 1935
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 3 32 2 3 3 1940 1962
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 1 1 1 1 1 2012 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
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 9 20 14 13 16 1939 2015
Vernon 6 38 4 8 8 1937 2016
Wayne 2 2 6 2 2 2000 2001