As the bees swarm in D.C., he answers the call

Honeybees darted by Delwyn Voss’s head as he stood on the roof of his rowhouse garage on Capitol Hill. Half a dozen came to rest on his shirt. Every year, just before the weather warms in the D.C. region, queens lay their eggs at the rate of 1,500 a day, overcrowding colonies. When the nectar begins flowing from spring flowers, thousands of bees fly out in search of a new home. They swarm trees, buildings, parked cars — anything that they can land on — eliciting curses and screams from...