How Fast Do Flies Lay Eggs?

It may surprise you to know that flies have a shorter life span than fleas and can lay up to 800 eggs in a week. Flies lay their eggs on decaying organic matter, including food scraps, carrion, and feces. The eggs are 0.05-inch long and hatch within eight to twenty hours.

Female flies can lay eggs within a few hours of emerging from their pupa cases. These pupae have dark outer shells and are inactive for three to six days. This stage is important because they develop their wings and legs. Flies are non-venomous and do not have teeth. They use a fluid-filled pouch on their head to crack open the pupae shell.

Female flies lay between 150 and 400 eggs per day. They can lay several batches in a single day. Each batch can contain from eight to twenty eggs. Once the eggs hatch, the maggots will emerge in three to eight days. Maggots will continue to feed at the site of emergence for up to five days. Flies can be found in garbage cans, dead animals, manure, and other places.

Fruit flies are known for their amazingly fast reproduction rates. This makes them a subject of much research.

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