Hi! This spring I started to provide housing for solitary mason bees, and got starter cocoons from the orchard on the Clackamas Community College campus to get started. However, two kinds of bees hatched out! About 40% are blue orchard mason bees. The rest are fuzzy and a bit stripey. They are all nesting currently in 8mm 6 inch straws/tubes/channels in wood blocks. The mystery bees carry pollen packed on hairs on their belly, and are separating their chambers/capping nests in mud. 1) Are these Osmia cornifrons? 2) If so, should I work to eliminate them because they are not native? I included pictures of one killed by a spider. Thank you for your assistance. Happy pollinating! -Janelle