. Montana amphibian and reptile status assessment, literature review, and conservation plan. Amphibians; Reptiles; Indicators (Biology); Habitat (Ecology); Wildlife conservation. Common Gartersnake (Thamnophis sirtalis) Up-to-date distribution and status information can be found on the Montana Natural Heritage Program's TRACKER website at Distribution/Taxonomy The Common Gartersnake {Thamnophis sirtalis) is the widest ranging reptile in North America, occurring coast to coast from British Columbia to Nova Scotia, south across Florida and west to southern California, while absent onl
. Montana amphibian and reptile status assessment, literature review, and conservation plan. Amphibians; Reptiles; Indicators (Biology); Habitat (Ecology); Wildlife conservation. Common Gartersnake (Thamnophis sirtalis) Up-to-date distribution and status information can be found on the Montana Natural Heritage Program's TRACKER website at Distribution/Taxonomy The Common Gartersnake {Thamnophis sirtalis) is the widest ranging reptile in North America, occurring coast to coast from British Columbia to Nova Scotia, south across Florida and west to southern California, while absent only from the American southwest. T. sirtalis extends much farther north than any other reptile, reaching across the southern border of the Northwest Territories. There are currently eleven recognized subspecies of Common Gartersnake on the continent, two of which reside in Montana: the Red-sided Gartersnake (T. sirtalis parietalis) and the Valley Gartersnake (T. sirtalis fitchi) (Rossman et al. 1996, Stebbins 2003). Generally, T. s. fitchi occurs west of the Continental Divide, while T. s. parietalis is found primarily east of the divide. However, these ranges are not clearly defined and there is likely some overlap and hybridization in western Montana (Fitch and Maslin 1961, Maxell 2000). Common Gartersnakes are found primarily in the mountainous to semi-mountainous regions of the Montana, including the island ranges, very few observations recorded in the eastern portion of the state. This gap in distribution may indicate a natural pattern, a regional extirpation, a lack recorded sightings, or observations being misidentified as the Plains Gartersnake (Thamnophis radix) (Rossman et al. 1996, Maxell 2003). Maximum Elevation Record 2,444 m (8,020 ft) in Beaverhead County (Werner et al. 2004). 553. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perf
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Keywords: ., booksubjectamphibians, booksubjectreptiles, booksubjectwildlifec
