Fruit fly or House fly pupa (casing)

Typically found near decomposing organic matter, garbage, kitchens, or moist drain areas.

As larvae (maggots), they consume decaying organic matter, bacteria, and yeast; as pupae, they do not feed.

This represents the transitional stage between larva and adult. The casing (puparium) hardens and turns brown to protect the developing insect inside.

While the pupae are harmless, the resulting adult flies can be nuisance pests and vectors for bacteria if they land on food. They benefit the ecosystem by breaking down organic waste.