9-25 days for housefly
Source from : http://www.solitudeigr.com/SolitudeIGR.aspx?country=US&species=OO&drug=SI&sec=210
More facts :
An adult fly could lay eggs everyday
Complete. Egg, larva (maggot), pupa, and adult.
The apple maggot, scientifically known as Rhagoletis pomonella, begins its life as an egg laid by an adult female fly on an apple or other fruit. Once the egg hatches, the larva burrows into the fruit, feeding on the flesh as it grows. After several weeks, the larva pupates, typically within the fruit or in the soil, eventually emerging as an adult fly. This life cycle allows the apple maggot to adapt and thrive in its host environment, often leading to co-evolution with fruiting plants.
They have a 4 stage cycle, egg, larvae (maggot) pupae (cocoon )and then adult, so any of the first 3 are "pre" fly.
The life cycle of a housefly typically includes four stages: egg, larva (or maggot), pupa, and adult. The entire life cycle from egg to adult can take as little as seven to ten days under optimal conditions.
A fly undergoes complete metamorphosis, starting as an egg laid by an adult female fly. The egg hatches into a larva (maggot) which feeds, grows, and molts before transforming into a pupa. Inside the pupa, the fly undergoes metamorphosis and emerges as an adult fly.
The stages of a fly include egg, larva (maggot), pupa, and adult. The life cycle begins with eggs being laid by an adult fly, which then hatch into larvae. The larvae develop into pupae before emerging as adult flies.
No larval stage is the maggot (as in housefly) then they pupate and the adult emerges after metamorphosis. Those insects where the nymphs adults look like adults have only a 3-stage cycle egg, nymph, adult, with no larval or pupal stage.
Fly eggs typically hatch into maggots within 8-20 hours, depending on factors such as temperature and humidity.
Egg, larva (caterpillar, maggot, grub etc), pupa (cocoon, chrysalis, etc), imago/adult (butterfly, fly, beetle etc).
maggot
An penguin is a bird that can take a very long time to develop from an egg to an adult.
No larval stage is the maggot (as in housefly) then they pupate and the adult emerges after metamorphosis. Those insects where the nymphs adults look like adults have only a 3-stage cycle egg, nymph, adult, with no larval or pupal stage.