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Amphibians of Washington

Oregon-spotted frog
(Rana pretiosa)


What they look like

  • 4-10cm
  • Bumpy light brown or olive green skin with dark spots which are lighter in color in the center
  • Belly, sides and the underside of short hind legs are red
  • Light jaw stripe that can sometimes be very faint.
  • Have skin folds along sides of back and eyes are slightly upturned
  • Very similar in appearance to Rana luteiventris

Where they live

  • Very rare and currently with populations at Black river and Conboy Lake.
  • Prefer marshes, wetlands, ponds, or other slow moving quiet water.


  • Breeding season is Feb-July depending on temperature and elevation.
  • Lay eggs in quiet, slow water.

Cool Biology Facts

  • Hibernates in winter up to a foot in the mud below water!
  • Currently very threatened in Washington state, have disappeared from 70-90% of their range.
  • Highly aquatic, more so than any other Pacific Northwest frog.
  • Not very adaptable and do not do well with even slight changes to their environment.


Distribution Map


Have severe declines in Washington state and breeding programs have been set up and have had moderate success in the reintroduction of the Oregon spotted frogs in a few areas. Main threats include nonnative species, including the bullfrog and introduced fish species and habitat loss and destruction.