Join naturalist Carol Strahler this evening for a lively presentation featuring frogs, salamanders, and quivering masses of eggs from local ponds. Find out how you can recognize frogs by their calls. The program will be followed by a walk to a nearby pond to see and hear frogs singing in the night. Bring a flashlight and dress for the weather. Cost: $2/person or $5/family. Eddy Discovery Center, 17030 Bush Rd. in the Waterloo Recreation Area near Chelsea. Please register in advance at 734-475-3170.