Two avian events on Saturday, February 5th: Build a Home to Attract Bluebirds - Bluebirds are early birds, and they’ll soon be hunting for houses with room for growing families. To be ready for their arrival, bring your family and build a cedar home. Bring cordless drill with eighth-inch bit and a Philips. 10am @ Kinder Farm Park, Kinder Farm Park Rd., Jumpers Hole Rd. off Ritchie Highway, Millersville; $15/family; rsvp: 410-222-6115.

Birding at Jug Bay - Learn to know your winter birds. Binoculars and field guides available. Ages 12+. 8-11am @ Jug Bay Wetlands Sanctuary, 1361 Wrighton Rd., Lothian. $3: 410-741-9330; www.jugbay.org.