If the weather holds, there will be a bounty of outdoor events in the Bangor area on Saturday for nature-lovers of all stripes. They include a birding walk at Essex Woods in Bangor from 8 to 10 a.m. led by Penobscot Valley Audubon; a nature walk at 8 a.m. to look for bobolinks at Fields Pond Audubon Center in Holden, followed by brunch at Hart Farm, also in Holden; and the Peony Society of Maine’s annual garden tour, kicking off at 10 a.m. at 1348 Ohio St. in Bangor and continuing on in Winterport, St. Albans and Ripley. If you’ve still got stamina left, there’s an alewife paddle at 5:30 p.m. at Hirundo Wildlife Refuge in Old Town, where you can watch alewives make their way up the refuge’s fish ladder.