Water insect of some sort

Water insect of some sort

Observation - Water insect of some sort - UK and Ireland. Description: There is not much to see in the photo, but these insects attracted our attention as they were spinning round and moving rapidly on the water surface. As they caught the sunlight, they reflected bright silver. They were active enough to cause ripples on th

There is not much to see in the photo, but these insects attracted our attention as they were spinning round and moving rapidly on the water surface. As they caught the sunlight, they reflected bright silver. They were active enough to cause ripples on the surface of the water. At a guess, I would think they were probably about 4-5mm big.