Flies and maggots in all their glory.
Manure heap. C/U of a fly. C/U of fly eggs. Young maggots. C/U of some of the maggots. Maggots wriggle around. A piece of earth is moved to show maggots. C/U of fly moving around. C/U of head of fly. Fly about to eat something (model?) Chrysalid or chrysalis. Group of crysalides - flies emerge. C/Us of flies emerging from crysalides. Flies climb their way through soil and burst through to the surface.
Note: some shots shared with "Where Flies Go In The Winter-time"