IUCN threat status:

Least Concern (LC)

Distribution

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Range Description

This species is endemic to the United States. The native range includes southwestern New York and northwestern Pennsylvania, mainly in the unglaciated portions of the upper Allegheny River drainage, at elevations of 270 to over 700 m (Ernst and Barbour 1989, Rossman et al. 1996, Ernst and Ernst 2003). This species is introduced and established at Pittsburgh and apparently also in Butler, Clearfield, and Erie counties (e.g., Lethaby, 2004, Herpetological Review 35: 73), Pennsylvania, in south-central New York (Conant and Collins 1991), and in Youngstown, Mahoning County, Ohio (Novotny, 1990, Herpetological Review 21: 42). In New York, this snake is restricted to the Allegheny River drainage in Chatagua, Cattaraugus, and Allegheny counties and two isolated (possibly introduced) areas at Horseheads straddling the Susquehanna and St. Lawrence river drainages, Chemung County (Bothner 1986).

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Source: IUCN

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