I have a home-made "bee hotel" in the garden, which has been successful in attracting Osmia bicornis and Osmia leaiana, together with a collection of different cleptoparasites. For the first time this year, it also attracted a Megachile centuncularis leaf-cutter. Within a day, I was thrilled to see a Coelioxys bee sitting on the top of the structure. Only the second one I've ever seen.
I was just wondering whether other observers who may use solitary bee houses/hotels, have also seen Coelioxys attracted to them and whether with the increasing popularity of these structures, some of these "scarcer" species may be observed more frequently?