Signs of the Seasons is a statewide effort to recruit volunteers to identify and record changes in more than 20 different indicator species like rockweed, milkweed, loons, butterflies and lilacs. The first training is scheduled for 12:30 to 2:30 p.m. Thursday, April 4, at Stimpson’s Point in Brunswick. Additional workshops will be held throughout April and May in Falmouth, Wells, Augusta, Camden and Boothbay.