Lesser Mealworm (Darkling Beetle)

Natural Habitat

Warm, damp environments such as poultry houses, bird nests, grain storage areas, and compost piles.

Diet & Feeding

Scavengers that feed on poultry feed, grain, bird droppings, and occasionally animal carcasses.

Behavior Patterns

Nocturnal and highly gregarious. Larvae are often found burrowing in insulation and wood, causing structural damage. They go through a complete metamorphosis.

Risks & Benefits

Significant economic pest in the poultry industry; they carry various pathogens such as Salmonella and E. coli. They can damage insulating materials in buildings.

Identified on: 5/18/2026