1 Bird-watching trek
Minnesota Valley National Wildlife Refuge, March 15, 8-10:30 a.m.
The refuge is hosting a series of bird-watching treks this spring, each exploring a different unit. This installment convenes at Old Cedar Avenue in Bloomington for a guided hike in search of waterfowl during the early part of the spring migration. More information: www.fws.gov/refuge/minnesota_valley/events.html.
2 Bluebird workshop
William O'Brien State Park, March 15, 1-3 p.m.
Get ideas on attracting bluebirds to your back yard and establishing a "bluebird trail." Purchase and assemble your own nesting box. Bring your own hammer. $17.50. More information: 651-433-0500 or www.mndnr.gov.
3 Maple syruping for the whole family
Whitewater State Park, March 15, 9-11 a.m. and 1-3 p.m.; March 16, 1-3 p.m.