Wisconsin Frog and Toad Survey
Help us learn more about how Wisconsin frogs and toads may be adapting to fluctuations in climate and weather patterns, including when they start breeding calls. Pick a wetland or waterbody near you, and listen anytime after sunset for 5 minutes at least twice weekly from April 1 to June 15, and at least once weekly through August 1. Fill out the data sheet recording the calls you identify, the time, temperature and other conditions.
Sample Phenology Datasheet