Oregon Spotted Frog
Egg Mass Surveys

The Oregon spotted frog (Rana pretiosa) was first observed in the Glenwood valley in the 1990s. With habitat loss, the population has been shrinking over its historic range, and now the Glenwood valley is one of only two locations they persist east of the Cascade Mountain range. The Oregon spotted frog was listed as federally Threatened in 2014, and it is state endangered.

Partnering with the U.S. Fish and Wildlife Service at Conboy Lake National Wildlife Refuge (Refuge), MARS works to document population changes of the Oregon spotted frog on the Refuge. A team of six MARS field technicians conduct month long transect surveys with the Refuge biologist to record egg masses laid each breeding season (usually March in Glenwood). This survey has been conducted in the Glenwood valley for over 25 years and is critical to monitoring the health of our local population.