University of Maine Cooperative Extension and Maine Sea Grant will offer four free “Signs of the Seasons” training sessions for volunteer citizen scientists around the state.  March 16, 4–6:30 p.m., Gilsland Farm Audubon Center, 20 Gilsland Farm Road, Falmouth March 24, 4–6:30 p.m., Audubon Fields Pond Station, 216 Fields Pond Road, Holden  April 8, 4–6:30 read more Training offered on ‘Signs of the Seasons’ in Maine