I was curious about what was living in the little pools at the center of bromeliads in my garden (with all the Zika in the news here, I wanted to know if there were mosquitoes breeding in them). I found no mosquito larvae in any of them. I did find many of these in most of them. They all seem to be of the same kind but there were many different sizes (~1-2mm long and smaller). They swam in serpentine motion, not wriggling like mosquitos. Taken with cell phone through lense of stereo microscope at 20X mag. Living with them there were also a great number of ostracods and few mites the size of the larva's head.