From Salish Sea Wiki
- https://www.burkemuseum.org/blog/curated/amphibians-reptiles-washington - Amazing pictures of amphibians.
- https://wdfw.wa.gov/conservation/herp_atlas/speciesmain.html - WDFW checklist of amphibians and reptiles.
- File:TCAMRC 2018 thurston amphibian road survey summary.pdf - results of four years of breeding season road surveys in Thurston County
- File:TCAMRC 2017 thurston amphibian road survey protocols.pdf - updated Thurston County methods used in the winter 2018 survey season
- Survey methods include egg mass, road kill, and passive tadpole traps.
- In 2014 Oregon spotted frog was listed under the ESA - https://www.fws.gov/oregonfwo/articles.cfm?id=149489458