Bumble bee queens, such as the Bombus impatiens queen shown above, forage in the spring as they initiate new colonies. New research shows that exposure to small amounts of the neonicotinoid insecticide imidacloprid during that period can delay a B. impatiens queen’s nest initiation and brood emergence—if the queens survive the exposure at all. (Photo credit: Flickr/USGS Bee Inventory and Monitoring Lab)