Fruit fly larva

Found globally in close proximity to human dwellings, specifically in rotting fruit, compost, or damp organic matter.

Larvae feed on microorganisms (primarily yeast) that grow on decaying organic matter and fermenting fruit.

Larvae undergo three instars (growth stages) before pupating; they are extremely fast-growing and tend to tunnel into their food source to feed constantly.

While they do not bite or sting humans, they are considered a major pest in homes and food facilities as they can contaminate food with pathogenic bacteria; however, they are invaluable to science as a model organism for genetic research.