Bill, I spent a couple of hours watching a male oriented vertically, moving debris as he was creating a nesting area a few days ago-never seen this before. 2 different females were working him while he was working.. he would occasionally just bump the female near the head if she got too close, just a tap and she would move away.
I spent an hour and a half too long watching that but a flat spot turned into a fairly large dish in that 2 hrs..