A most unattractive water-inhabiting visitor - rat-tailed maggots!

We have had so much rain recently that water accumulated in places it never had before. In a ceramic pot base, which is sealed at the bottom, some dead leaves had fallen and begun to decay. Among them I noticed a collection of mosquito larva but also some much larger really rather disgusting-looking white/transparent maggot-like creatures with long rat-like tails - commonly known as rat-tailed maggots!. It seems they are either Syrphid or Hover fly or Drone fly larvae. Either way, I'll be glad when they hatch out and fly off! Fascinating none-the-less....