Friday-Saturday -- Buy, sell, swap at the 10th annual East Coast Decoy Collectors Show, all day, rain or shine, Best Western motel, 1228 S. Talbot St., St. Michaels. Free appraisals. Details: 410-745-2955 or john@njdecoys. com.
Wednesday -- Learn how to fix a flat, lube a chain and make adjustments at Bike Maintenance 101, 7 p.m., REI Timonium, 63 W. Aylesbury Road. Free. Details: 410-252-5920.
Saturday -- Tune up your ears and eyes for spring migrants at Delaware's Bombay Hook National Wildlife Refuge, 8 a.m.-11 a.m. Led by author and professional birder Jeffery Gordon. Good for beginners. Free with park entrance fee. Meet at visitor center. Details: 302-653-9345.
Saturday and April 28 -- Join a Cromwell Valley Park naturalist at Willow Grove Farm, 2002 Cromwell Bridge Road, for a bird walk, 8 a.m. Details: 410-887-3014.
Saturday -- Seven-mile nature hike around Atkinson Reservoir with the Sierra Club, 10 a.m. Bring water and lunch. Expect mud. Meet at Harford Glen parking lot. Details: 410-569-5202.
Next Sunday -- Hike 10 miles on the west side trails at the Patuxent Wildlife Research Center North Tract with the Appalachian Mountain Club. Meet at 10 a.m. Details: 410-263-1844.
Next Sunday -- Wildflower hike along the Gunpowder River with the Sierra Club, 9:30 a.m. Six miles, moderate terrain, mud and stream crossings. Meet at the Gunpowder Falls State Park parking lot on Belair Road. Details: 410-254-7240.
May 12 -- Farmers and Hunters Feeding the Hungry fundraising banquet, 2 p.m., Harford County's Level Volunteer Fire Hall. Door prizes and silent auction items. Tickets: ages 4-15, $15; ages 16 and up, $20; $36 a couple or $150 for table of eight. Details: firstname.lastname@example.org
Saturday, May 12 and June 9 -- Join the habitat restoration team at Cromwell Valley Park, 2002 Cromwell Bridge Road, to remove invasive non-native plants at Sherwood Farm, 9 a.m.-noon. Bring gloves, shovels and saws. Coffee and doughnuts provided. Details: 410-887-2503.
Items -- Submissions for the outdoors calendar may be mailed to Outdoors Editor, The Baltimore Sun, 501 N. Calvert St., Baltimore, MD 21278-0001. Please include time, date and location of events, as well as a short description of planned activities and a telephone number for more information. Please mail listings four weeks before the date of the event.
More outdoors -- For more outdoors coverage, calendar and photos, go to baltimoresun.com/outdoors.
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