Wild bees that live primarily in forests are an understudied group, but new research sheds light on the ecology of bee species that do much of the spring pollination work in woodlands. Sampling bees from sites in New Jersey, New York, and Pennsylvania showed Osmia pumila (male shown here) as one of the most common, clearly forest-associated species. (Photo by USGS Bee Inventory and Monitoring Lab via Flickr, public domain)