National Park Service

Greater Yellowstone Network (GRYN)

Amphibian Monitoring

Amphibian egg mass confirms breeding
Sighting an amphibian egg mass confirms breeding at a place and time. These observations help estimate how many and what types of wetland areas are occupied by amphibians.

Resource Briefs

Monitoring Reports

Protocol Documents

Related Information

For more information contact: Andrew Ray


The Intergovernmental Panel on Climate Change ranked wetlands as among the habitats most threatened by climate change globally. Not surprisingly, wetland-dependent organisms including amphibians have exhibited declines that coincide with wetland loss, including those in national parks. There are four native amphibian species that are regularly observed in Grand Teton and Yellowstone National Parks include: the Columbia spotted frog (Rana luteiventris), the boreal chorus frog (Pseudacris maculata), the barred tiger salamander (Ambystoma mavortium), and the boreal toad (Anaxyrus boreas boreas).

Long-term monitoring of wetlands (amphibian breeding sites) in Grand Teton and Yellowstone national parks is vital to understanding population trends for amphibians and other wetland-dependent species. The Greater Yellowstone Network (GRYN), along with federal, university, and nongovernmental organization (NGO) scientists, has been monitoring amphibian populations and wetland habitats since 2005. The overall goal of the long-term monitoring program is to characterize changes in wetland condition and estimate occupancy rates for breeding native amphibian species. Annual monitoring allows us to track and quantify changes in the number and quality of potentially suitable breeding sites. GRYN's collaborative amphibian monitoring is also combined with other Amphibian Research and Monitoring Initiative (ARMI) regional and national monitoring efforts to better understand trends in monitored populations of amphibians throughout the Rocky Mountains and across the conterminous United States.

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Last Updated: February 10, 2017 Contact Webmaster