(re-post)
The aubade to the dawn bubbles scooted to the bird bath; one perched in a wait for space or perhaps it was just dipping toes and observing; a bunch of little ones gathered in the shallow end.
I've not seen this attraction to the water to such an extent and it prompted the pool scenario thoughts.
The bubbles also lasted much longer than usual. Must have something to do with humidity and temperature and the sun onlooking.