Take the lunchtime walk to see what birds are currently calling Adriana Hess Wetland Park home; this is a short, easy walk, and is led by volunteers Rosanne Becker and Russ Smith; bring binoculars and a field guide if you have them, or you can borrow some; noon-1:30 p.m. Monday; Adriana Hess Wetland Park, 2917 Morrison Road W., University Place; free; tahomaaudubon.org.
Doing routine maintenance can prolong the life of your bike and ensure you enjoy a smooth ride; this introductory class is designed to help you take care of your bike by doing things such as lubing the chain, fixing a flat and making minor adjustments; 7-8:30 p.m. Tuesday; REI, 625 Black Lake Blvd. SW, Suite 410, Olympia; free; register at rei.com/olympia; 360-786-1938.
The Olympia-Thurston County Stream team and guest biologist Larry Phillips from the state Department of Fish and Wildlife will lead this beach seine event; participants can help pull a seining net to shore to see the different species caught; Phillips will identify and talk about the individual species found; 6:30-8 p.m. Tuesday; meet at the main beach trail in Priest Point Park, past shelter No. 2, Olympia; register at streamteam.info/getinvolved/calendar.
Join Metro Parks Tacoma for this family adventure paddling on the Nisqually River delta, the largest saltwater estuary in Puget Sound; for ages 7 and older; 10 a.m.-1 p.m. Saturday; meet at Luhr Beach Boat Launch; cost is $30 for district residents and $50 for nonresidents; sign up by calling 253-305-1022, Monday-Friday 8 a.m.-5:30 p.m.; metroparkstacoma.org.