Cornwall The Hudson Highlands Nature Museum will lead a butterfly walk on Saturday, June 25 beginning at 10 a.m. (Rain date: June 26.) Adults and children over the age of 12 can join local naturalist John Yrizarry for an informative look at the world of butterflies at the Outdoor Discovery Center, on Muser Drive, across from 174 Angola Road, in Cornwall. Bring binoculars and wear sturdy shoes. Admission: $7. Members: $5. For more information call 534-5506, ext. 204 or visit www.hhnaturemuseum.org.