My bee condos look like this:
They are from Mason Bees LLC. They char the reeds with a blow torch, which mason bees in Utah seem to like.
There are 20 of my bee condos in Salt Lake City. Most are in public spaces.
The point? To survey for stick-nesting bees. Bee condos are also very useful for "bee watching" if you put one in your yard.
Bee Watching looks like this:
Kathlyn Collins, Gardening Coach, laid back.
Most of my condos are hanging in trees....
Clockwise from top left: Bobsled bike trail, City Creek, Jordan River, and another in City Creek.
And 16 more.... map here.