Rana pretiosa — Oregon Spotted Frog
This frog is highly endangered, known to exist in only a dozen or so sites in central Oregon. It used to be far more common, but voracious bullfrogs and developers have greatly reduced its range. We specifically went to Crane Prairie Reservoir in search of it, which paid off nicely since in addition to this frog I saw three nice gartersnakes and one extremely wonderful toad.
- Behler, J. L., King, F. W. 1979. The Audubon Society Field Guide to North American Reptiles & Amphibians
- Corkran, C. C., Thoms, C. R. 1996. Amphibians of Oregon, Washington and British Columbia: A Field Identification Guide
- Crother, B. I. (ed.) 2017. Scientific and Standard English Names of Amphibians and Reptiles of North America North of Mexico, with Comments Regarding Confidence in Our Understanding, Eighth Edition
- Elliott, L., Gerhardt, C. and Davidson, C. 2009. The Frogs and Toads of North America
- Stebbins, R. C. 2003. Peterson Field Guide to Western Reptiles and Amphibians, Third Edition