Rubber boa (Charina bobttae) COSEWIC assessment and status report: chapter 4

Distribution

Global range

The Rubber Boa is found in British Columbia and the western United States, from Washington south to central California and eastward as far as Montana, Wyoming and northwestern Colorado (Figure 1). The southern subspecies is restricted to a few locales in the San Bernardino and San Jacinto mountain ranges east of Los Angeles in southern California. Rubber Boas are found from sea level up to 3050 m (Nussbaum et al. 1983).

Figure 1. Range of the Rubber Boa in North America (after Stewart 1977; Gregory and Campbell 1984).

Figure 1. Range of the Rubber Boa in North America(after Stewart 1977; Gregory and Campbell 1984)

Canadian range

The distribution of the Rubber Boa in Canada is patchy and confined to the southern third of mainland British Columbia (Figure 2). Most records are from the Thompson River basin south, and the northernmost record is from Quesnel, BC (Cannings et al. 1999). The only population of Rubber Boas that has been studied in Canada is in the Creston Valley Wildlife Management Area.

Figure 2. Range of the Rubber Boa in British Columbia (taken from Cannings et al. 1999).

Figure 2. Range of the Rubber Boa in British Columbia(taken from Cannings et al. 1999)

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