Big trees, little trees: The May program meeting of the Pilchuck Audubon Society will be “Big Old Trees and Little Trees” with Jerry Franklin, professor of ecosystem processes and forest ecology at the School of Environmental and Forest Sciences at the University of Washington.

The meeting will be held at 7 p.m. today at the Everett Firefighter’s Hall, 2411 Hewitt Ave., Everett.

Franklin will speak about the importance to wildlife and vegetation of big, old trees. Franklin was among the principal architects of the Northwest Forest Plan and was appointed by former President Bill Clinton to the White House Forest Conference in 1993. The plan was pivotal in preserving old growth stands to restore habitat for the northern spotted owl.

For more information, leave a message at 425-252-0926.

Bike swap work party: Sharing Wheels Community Bike Shop will hold a Kids Bike Swap on June 8, and in preparation, work parties are scheduled for bike mechanics of all skill levels. There will be free food.

The work parties are Saturday from 10 a.m. to 3 p.m.; May 22 from 6 to 9 p.m.; June 1 from 10 a.m. to 3 p.m.; and June 4 from 6 to 9 p.m.

The bike shop at 2525 Broadway in Everett, meanwhile, is need of lightly used kids bikes, especially with 20-inch wheels, and volunteers will be needed the day of the swap.

More information: 425-971-0199 or www.sharingwheels.org