Red flour beetle
Scientific Name: Tribolium castaneum
Order & Family: Coleoptera; Tenebrionidae
Size: 3 to 4 mm (1/8 inch) in length

Natural Habitat
Found worldwide in indoor environments where grain, flour, and other dry food products are stored.
Diet & Feeding
Scavenger that feeds on stored grain products, cereals, flour, dried fruit, nuts, and crackers.
Behavior Patterns
Adults are long-lived, sometimes surviving up to three years. They are active crawlers and can fly short distances. They lay eggs directly in food sources where larvae develop.
Risks & Benefits
Major pest of stored products; they contaminate food with their presence and odorous secretions. They do not sting or bite humans but cause significant economic losses in the food industry.
Identified on: 1/30/2026