CORNWALL — On Jan. 28 at 10 a.m., come to the Hudson Highlands Nature Museum’s Outdoor Discovery Center, on Muser Drive, across from 174 Angola Road, for “Animal Tracks and Traces.”Animals leave traces of their presence everywhere, but many people can't recognize the evidence. In this workshop, a museum naturalist will lead a wintry walk to discover “secrets in the snow” left by animals.