Reference List

This list includes references used to derive specimen records.

Results also available in CSV (click to export table to spreadsheet)
Ref IDTypeAuthorDateTitle
17867 Journal ArticleBalfour, P.S., D. Brown, E.W. Stitt, K. Grinsell, and A.K. Buchanan2007Geographic Distribution: Nerodia sipedon (Northern Watersnake). USA: California: Placer Co.
20979 OtherDeLorme.2001South Dakota Atlas and Gazetteer.
26212 DatabaseGBIF2013Global Biodiversity Information Facility (GBIF) Database.
25971 DatabaseNatural History Museum of Los Angeles County2013Natural History Museum of Los Angeles County vertebrate collection. Accessed through GBIF data portal,
26614 Journal ArticleRose, J.P., O.J. Miano, and B.D. Todd2013Trapping efficiency, demography, and density of an introduced population of northern watersnakes, Nerodia sipedon, in California.


The data represented on this site vary in accuracy, scale, completeness, extent of coverage and origin. It is the user's responsibility to use these data consistent with their intended purpose and within stated limitations. We highly recommend reviewing metadata files prior to interpreting these data.

Citation information: U.S. Geological Survey. [2023]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [5/29/2023].

Contact us if you are using data from this site for a publication to make sure the data are being used appropriately and for potential co-authorship if warranted.

For general information and questions about the database, contact Wesley Daniel. For problems and technical issues, contact Matthew Neilson.