After a long winter in hiding, an amazing variety of frogs, salamanders, and aquatic invertebrates will once again make their presence felt in a temporary wetland known as a vernal pool. At twilight, we’ll hike the trail to a group of vernals in Avalonia’s Babcock Ridge Preserve to search for such creatures as wood frogs and spring peepers, spotted and marbled salamanders, and fairy shrimp. We might also hear the booming hoots of barred owls and the peents of woodcock. Bring a flashlight, wear warm clothes and waterproof boots, and don’t forget your spirit of adventure. Walk leader Bruce Fellman has been introducing people to vernal pool life for almost a half-century.