Bug Identifier
Merchant Grain Beetle
Community identification

Merchant Grain Beetle

Oryzaephilus mercator

Order & Family
Order: Coleoptera; Family: Silvanidae
Size
2.5 mm to 3 mm (approx. 1/8 inch)
See this bug in the Encyclopedia

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.