In 2018, the United Nations became so concerned about threats to the well-being of bees it designated a World Bee Day every May. Concern for the bees has certainly made its way into the mainstream. In any American town it’s easy to find bee-themed gifts galore, along with a vague sense among residents that we need to “save the bees.” However, this challenge is not just about honeybees. In fact, there are more than 20,000 species of bees in the world and more than 4,000 in North America, and all of them deserve our concern. The Western honeybee (Apis mellifera), the one dancing across the festive tea towels, pencil cases and coffee mugs I’ve been gifted as a beekeeper and novelist who writes about bees, is only one of them. Learn more Eileen Garvin will discuss her novel “Bumblebee Season” with Seattle Times arts critic Moira Macdonald at 7 p.m.…