Life … Animals Arthropods Insects Hymenopterans Mason, Leafcutter, Carder, and Resin Bees Cuckoo Leaf-cutter Bees Boreocoelioxys Sad Cuckoo Leafcutter Bee species 5 observations Sad Cuckoo Leafcutter Bee Coelioxys moestus Supported by All 4 native plantssupport it in the US Nectar plants Plants whose flowers it visits Fireweed, Pinewoods Geranium, Butterfly Milkweed, Smooth Blue Aster 4 Close