Observer Editor, Free
“River Roundup”: Huron River Watershed Council.:
All invited to learn about and help collect macroinvertebrates—including insect larvae and crayfish—from Huron River tributaries to measure the river’s health. Kids welcome if accompanied by an adult. Rain or shine. 9 a.m.–1 p.m., meeting place TBA. Free. Preregistration required at hrwc.org/volunteer/roundup. email@example.com; 769–5123., . . . . . .