redbud tree leaves harvested by leaf-cutter bees - megachile

redbud tree leaves harvested leaf-cutter bees leaf cutter visit garden trees leave circular patterns harvest material megachile genus cosmopolitan group solitary called leafcutter leafcutting includes resin mortar bees species use cut line cells nests thought discs help prevent desiccation larva's food supply industrious diligent painstaking studious active determined productive flora fauna laborious