House flies start out as eggs from which maggots hatch after one day. The maggot stage lasts three to five days; during this stage the maggots spend a lot of time molting. The pupae stage is next and lasts three to six days. The flies are encased in a hard shell somewhat like a butterfly cocoon during the pupae stage. Finally, full grown house flies emerge at the end of the pupae stage.
yes
yes
Not all flies like faeces, many will lay their eggs in it and their larvae will grow and feed on it, getting all the nutrients they need to grow from it. Adult flies may feed from it too on occasion.
No. Flies lay eggs, which hatch into maggots, which become pupae, which then become flies.
Horse flies can grow up to 1.25 inches in size.
Maggots are the young of flies and will grow up to be adult flies and those flies can reproduce.
Piggy's
Flies are insects, they go though a number of larval stages before turning into flies. Growth happens in these larval stages, once an adult fly hatches out it does not grow any more, indeed it cannot grow as its exoskeleton is of fixed size.
In soft, ripe fruits. Which maggots grow in.
Maggots do not grow out of nothing. They are the larval stage of flies. Flies lay eggs, and these eggs hatch into maggots under the right conditions of warmth and moisture.
piggy's hair doesn't seem to grow
You don't. They grow from eggs laid by female bot flies under the skin of an animal. When the eggs hatch maggots grow under the skin and then metamorphose into adult bot flies, which then cut their way out to emerge through the skin.