Sphaerocerid Fly, Lesser Dung Fly

Scientific Name: Sphaeroceridae (family)

Order & Family: Order: Diptera, Family: Sphaeroceridae

Size: Typically small, 1-5 mm in length.

Sphaerocerid Fly, Lesser Dung Fly

Natural Habitat

Often found in decaying organic matter, such as dung, carrion, rotting vegetation, compost piles, and wet environments. They can also be found indoors, especially if there's decaying matter or moisture issues.

Diet & Feeding

Larvae feed on decaying organic matter (dung, fungi, rotting plants). Adults may feed on liquid organic matter or not feed at all.

Behavior Patterns

Attracted to decaying matter for breeding. They are generally weak fliers and often seen crawling or making short flights. Some species are attracted to light. Their life cycle can be rapid under favorable conditions.

Risks & Benefits

Generally considered nuisance pests. While not typically vectors of human disease, they can indicate unsanitary conditions. They play a role in decomposition, thus contributing to nutrient cycling in ecosystems.

Identified on: 9/19/2025