The photo below is from the birdbath in my back yard, a "standard" cast concrete birdbath. I try to change the water every couple of days to prevent mosquitoes from raising in it, I frequently see wiggletails in the water before I wash it out. Recently I noticed what appeared to be small clusters of bubbles on the surface, when there was no reason for bubbles to be there (See photo). My question is ?Are these mosquitos? eggs?
Mosquito eggs 3.jpg