A conservation assessment for the Oregon spotted frog (Rana pretiosa)

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This assessment regarding the Oregon spotted frog (Rana pretiosa) is presented in two parts. Part I, a conservation assessment, summarizes the species’ biology, status, threats, and general management considerations for its conservation. Part II outlines research, inventory, and monitoring needs and opportunities for the species, as identified and compiled by the Oregon Spotted Frog Working Group, which was convened by the Interagency Special Status/Sensitive Species Program in 2005 to collect and assess literature and field data pertaining to the status of the Oregon spotted frog. The species is endemic to the Pacific Northwest and historically ranged from southwestern British Columbia to northeast California. It is currently known from <50 sites in southwestern British Columbia; western and south-central Washington; and western, central, and south-central Oregon. No populations are known to persist in California. Revisits of historic localities suggest that the species is lost from 70–90% of its historic range. Thirty of the 34 Oregon spotted frog localities evaluated as part of this assessment are at least partially on Federal land. The authors identify factors that are likely or potential threats to Oregon spotted frogs and offer management actions for consideration toward maintaining or improving local habitat conditions likely to benefit the frog’s persistence.

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ELECTRONIC FILE - Zoology