Life … Animals Arthropods Insects Hymenopterans Mason, Leafcutter, Carder, and Resin Bees Mason Bees Melanosmia Cobalt Blue Mason Bee species 4 observations Cobalt Blue Mason Bee Osmia cobaltina Supported by All 22 native plantssupport it in the US Nectar plants Plants whose flowers it visits Silvery Lupine, Wingnut Cryptantha, Lobeleaf Groundsel, Wavyleaf Thistle 22 Close