Part of study to place the OSF on the Federally 'Threatened' list. Location not specific to protect this population.
Oregon spotted frog egg masses located in shallow margins of pond. Northern red-legged frog egg masses attached to vegetation in much deeper water.
Juveniles, larvae and egg masses in wetland
A small population of Oregon Spotted Frogs was discovered in the Cascade-Siskiyou National Monument in 2003.
According to Southern Oregon University biologist, Michael Parker, this species is "the most imperiled amphibian species in the Pacific Northwest" - 2009 Status Report
The Oregon spotted frog (Rana pretiosa, meaning "precious frog") is a member of the frog family Ranidae of order Anura. It is a medium-sized aquatic frog endemic to the Pacific Northwest and historically well distributed in the Puget Trough/Willamette Valley province and the Cascade Mountains of south-central Washington and Oregon. It is relatively rare within its range and is listed globally as vulnerable.