Maggot (fly larva)

Characteristics and life cycle

Maggots hatch from eggs and represent one phase in complete metamorphosis: egg, larva, pupa and adult. Larvae vary in size and shape among species but commonly display a tapered, cylindrical body, a hardened head region or mouth hooks for feeding, and spiracular structures for breathing. Many species pass through several larval instars before pupating in soil or other substrate and emerging as adult flies.

Ecological roles and behavior

Most maggots are saprophagous, consuming decaying plant and animal matter and accelerating nutrient recycling. Some are predatory or parasitic: certain species attack live hosts, causing myiasis in livestock and, occasionally, humans. Maggots also appear in aquatic and terrestrial habitats where they influence decomposition rates and food webs.

Human uses and significance

• Maggot debridement therapy: Sterile larvae of particular blowfly species are used clinically to remove dead tissue and promote wound healing.
• Forensic entomology: Patterns of maggot colonization and development help estimate time since death and other case details.
• Pest and veterinary concerns: Some species harm crops, stored products, or cause economic losses through myiasis in animals.

Distinctions and notable facts

Not all fly larvae are called maggots in technical contexts, and the word remains informal. Identification to species often requires examination of larval anatomy or rearing to adults. While widely disliked, maggots play essential roles in decomposition and have practical medical and forensic applications, illustrating the complex relationship between humans and these larval insects.