Vancouver Bee Project will host a free “Introduction to Spring Mason Bees (and Other Pollinators)” from 1 to 2:30 p.m. March 9 at the Vancouver Community Library, 901 C St., Vancouver. Learn about the life cycle, habitat needs and behaviors of mason bees, as well as how to encourage other beneficial pollinators. Get tips for creating a pollinator-friendly environment in your own back yard.