ID pls for big-eyed tiny larvae of some kind?

[Dillybythesea]

This is our new nature pond's first spring and it's great to see tiny somethings moving about - but I don't even know what words to use in Search, to try to identify what's what. I've tried searching larvae, mosquito larvae, mayfly larvae and daphnia... but nothing seems right so far. Any help wld be MUCH appreciated!
This one looks like it has a snorkel? And there's a much smaller something passing by its tail?

This looked different at the mouth area... and in the second angle (below) it seems to have antennae?

[Dillybythesea]

Whoops, didn't seem to have inserted second shot. Sorry. And am wondering what's the skating fly too, if poss?

[Gerel]

The first two shots seem to show the cast skin/pupa of a mosquito or similar that has now become an adult (possibly the fly on the surface of shot three).

The other larva in the first shot looks like a mayfly of some kind.

[Dillybythesea]

Ah I see! And twld account for them seeming just to drift on the surface. Many thanks Gerel! (It'll make me feel a lot better now when some of them get hooked out in the net with the algae. I won't have to pick them out and put them back in the pond!)

[Dogghound]

It is a Chironomid midge.

[Dillybythesea]

Thank you Dogghound! Now you've given me the name I've been able to read up about them with great interest - recalling the tiny blood red worms, etc. I had taken a shot of the midge emerging from the case and not realised what was happening. Doh!