The Great Basin population of Columbia spotted frogs, currently a candidate species for Endangered Species Act protection, is found in eastern Oregon, southwestern Idaho, and the northern drainages of Nevada. Spotted frogs live in spring seeps, meadows, marshes, ponds and streams, and other areas where there is abundant vegetation flooded throughout the year. The largest known threat to the Columbia spotted frog is habitat alteration and loss, specifically the loss of wetlands used for feeding, breeding, hibernating, and migrating.
Service biologists are working with our partners to monitor current spotted frog populations to assess population trends and distribution, and also improve and create habitat throughout the Great Basin to prevent the frog’s further decline.
For example, as part of a Conservation Agreement and Strategy for the Toiyabe Mountains and Northeast populations of Columbia spotted frogs, 36 ponds were created in central Nevada and all ponds have documented occupancy with 77 percent having breeding activity. And in Idaho, a Candidate Conservation Agreement with Assurances was completed to improve breeding, foraging, dispersal, hibernating habitat, and migration corridors for Columbia spotted frogs at Sam Noble Springs while allowing continued livestock use on these state lands. In addition, 41 ponds were constructed or enhanced on private lands in Idaho to increase breeding habitat and connectivity between existing populations.
Active monitoring, research, and habitat improvement projects are occurring or are planned throughout the entire range of the Great Basin population of Columbia spotted frogs, which are increasing our knowledge of life history characteristics, population fluctuations, effectiveness of habitat improvement projects, genetics, and stressors to the species. Learn more about this species and other efforts to protect amphibians: http://1.usa.gov/1HOIIwM