Three things to do this weekend

Saturday: Join the Black Hills Audubon Society for a winter bird walk in downtown. Burt Guttman will lead the walk from 9 a.m. to noon. Meet at Marathon Park. The emphasis will be on the ducks and other seabirds that spend much of the winter in Capitol Lake and other downtown waterways, These trips are geared for beginners but all are welcome. No registration required.

Saturday: Take the GPS seminar being offered by the Olympia Sail & Power Squadron from 10 a.m. to noon. The class will be at the Lacey Fire Station, 6500 Mullen Road, Lacey. Class size is limited. To register, contact Tim Miller at tennistm@comcast.net or 360-413-0311.

Saturday and Sunday: The staff at Cabela’s will offer tips on what you need to do to properly maintain your hunting optics systems to be ready for next season; noon to 12:45 p.m. at optics counter of the Lacey store.