#3
Sciaridae, indeed, but whether these are the
Bradysia suggested by Joke, I doubt it.
These must have been dead already when you took the picture. Wonder whether curiosity killed these cats, or maybe some fungus.

#5
Yes, definitely a fungus - the "outstretched legs and wings" pose is typical of parasitic fungal attack, and the pale areas on the abdomens are where the fungus is beginning to burst out to release spores.