Frogs and salamanders are among the first creatures to wake in the spring, wooing us and each other with their love songs. These delightful creatures have much to teach us about our ecosystems, as they are some of the first species to be affected by chemical assaults. Weltand Ecologist Mary Linton, who formerly taught at Goshen College, will offer a day-long glimpse into the lives of local amphibians. Limit: 15. Bring knee boots and rain gear. Cost: $55 per person.