Bee and wasp hotels on iNaturalist If you’re fond of hole-nesting bees and wasps, please join the new “Bee and Wasp Hotels” project on iNaturalist.org to document the guests and hangerson that arrive at your hotel. View more observations from Bee and Wasp Hotels on iNaturalist » Currently the most photographed visitor is the four-toothed mason wasp (Monobia quadridens). But also plenty of mason bees as well as parasites looking for mason bees. There has also been a slug sighting (don’t ask). If this sounds fun but you don’t have a hotel, here are my thoughts on building one.