Recently, I hung a log in the garden, sheltered from the elements and drilled with varying sized holes for all the different flying creatures that pass this way. This is one creature that I haven't otherwise see except in the wild, and they keep coming back, generation after generation. It's a job keeping the ubiquitous black ant off it and from pillaging the nest sites - but not impossible. They are very shy and only really approachable when absorbed in sealing the nest. Otherwise they are going in or coming out. Sometimes they sleep inside and guard with their rear or front. I am waiting for the next generation now. They are called Megachille but probably also a resin bee, given their use of it in building their nests. And this is the entrance to a small native wasp nest, on another log nearby.