Wildlife Wednesday - skating things

I don't have the first clue what these are. I've sat on this picture for a while because I thought by some miracle I might work out what they are...but no miracles have come forth. So I give you the picture.

This is from when I was fishing with Dad. And these sparkly specks are tiny fish / bugs / flies / things (maybe 2mm long at best) skating across the surface of the river. They were there for ages, and there were quite a few of them.

I took a photo to have proof that I'd seen them because dad reckoned he couldn't see them - and to be fair, they were at my end of the boat and they are tiny. It's just that there's this little part of me that wonders if I've imagined them! Do you ever get like that!?!

Anyway, here's another mystical wildlife beastie that inhabits my local area, for which I have no clue what it is!

I love Wildlife Wednesdays :) Anyone know if these are real? Or what they might be called?