Lindsie McCabe, Ph.D., is a postdoctoral fellow with the U.S. Department of Agriculture’s Agricultural Research Service who led a recent study on practices for deploying Osmia lignaria bees for pollination in orchards. Here, McCabe pauses next to a O. lignaria nest box during the season after bloom and bee foraging. In the next box, tunnels with “mud caps” are nests filled with immature O. lignaria bees.