
Community identification
Merchant Grain Beetle
Oryzaephilus mercator
- Order & Family
- Order: Coleoptera; Family: Silvanidae
- Size
- 2.5 mm to 3 mm (approx. 1/8 inch)
Natural Habitat
Commonly found in residential kitchens, pantries, and food warehouses, typically within stored cereal products or oils.
Diet & Feeding
Feeds on processed grains, oatmeal, flour, breakfast cereals, dried fruits, and high-oil content foods like seeds and nuts.
Behavior Patterns
Fast-moving, flattened beetles that can squeeze into tiny cracks in packaging. They do not fly often but are prolific breeders in stable indoor environments.
Risks & Benefits
Generally harmless to humans and pets as they do not bite or sting. However, they are significant domestic pests that cause food spoilage and contamination, leading to economic loss.