I also like the fact that the Bees re-use the available holes. This encourages parasites, in particular certain wasps to hang around in decent numbers adding to the interest. I'll let you know when the females are on the wing. I attach a photograph of a rather cool male I picked up below the bee log and placed on the windowsill. It only took a couple of minutes to warm up before it was buzzing once more around the holes.
|1st time out. Osmia bicornis male emerging. I watched this chap break through his clay seal. 27.04.2013|