Rubber boa (Charina bobttae) COSEWIC assessment and status report: chapter 7
Population Sizes and Trends
The number and size of Rubber Boa populations and subpopulations in Canada are unknown. In the Creston Valley Wildlife Management Area, 361 250 m² were searched over 3 three years in the late 1990s (>1000 hours search effort) and yet only 65 snakes were found. Seven of the 65 snakes were recaptured once and two snakes were recaptured in subsequent years; however, the recapture rate of marked snakes is too low to calculate population density. Rubber Boas do not seem to be particularly abundant in Creston Valley, despite being in an area that is considered prime habitat for the species.
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