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The Nonindigenous Occurrences section of the NAS species profiles has a new structure. The section is now dynamically updated from the NAS database to ensure that it contains the most current and accurate information. Occurrences are summarized in Table 1, alphabetically by state, with years of earliest and most recent observations, and the tally and names of drainages where the species was observed. The table contains hyperlinks to collections tables of specimens based on the states, years, and drainages selected. References to specimens that were not obtained through sighting reports and personal communications are found through the hyperlink in the Table 1 caption or through the individual specimens linked in the collections tables.

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Common name: Lesser Siren

Taxonomy: available through www.itis.gov

Native Range: Atlantic and Gulf Coastal Plain from Virginia to Mexico, northward up the Mississippi River Basin to Illinois and Indiana (Conant and Collins 1991).

Alaska	Hawaii	Puerto Rico & Virgin Islands	Guam Saipan

Hydrologic Unit Codes (HUCs) Explained
Interactive maps: Point Distribution Maps

Means of Introduction: May have come in via a plant shipment from Arkansas in 2005 (Micheletti 2010).

Status: Two adults and 40 larvae were removed when the pond was drained (Micheletti 2010).

Impact of Introduction: The impacts of this species are currently unknown, as no studies have been done to determine how it has affected ecosystems in the invaded range. The absence of data does not equate to lack of effects. It does, however, mean that research is required to evaluate effects before conclusions can be made.

Remarks: Also found several American bullfrogs in the pond. The taxonomy of sirens is under review.

References: (click for full references)

Conant, R.  and J.T. Collins. 1991. A Field Guide to Reptiles and Amphibians of Eastern and Central North America. Houghton Mifflin Co., Boston.

Micheletti, S. J. 2010. Siren intermedia (Lesser Siren),extralimital introduction/reproduction. Herpetological Review 41(4):470.

This information is preliminary or provisional and is subject to revision. It is being provided to meet the need for timely best science. The information has not received final approval by the U.S. Geological Survey (USGS) and is provided on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from the authorized or unauthorized use of the information.