Spider Beetle
Scientific Name: Ptinus spp. or Gibbium spp. (without clearer detail, specific species cannot be identified, but these are general genera for spider beetles)
Order & Family: Coleoptera, Ptinidae
Size: Typically small, ranging from 1 to 5 mm (0.04 to 0.2 inches) in length.
Natural Habitat
Commonly found in pantries, food processing plants, warehouses, mills, and other areas where dried food products or organic materials are stored. They prefer dark, undisturbed, and often damp environments.
Diet & Feeding
Omnivorous scavengers. They feed on a wide variety of dried animal and vegetable matter, including grains, seeds, dried fruits, spices, pet food, wool, leather, and even museum specimens.
Behavior Patterns
Spider beetles are nocturnal and are good at hiding and playing dead when disturbed. They can infest a wide range of stored products and are known to be resilient pests.
Risks & Benefits
Risks: Primarily considered a pantry or stored product pest. They can contaminate food products with their presence, webbing, and excrement, making the food unfit for consumption. They do not bite or transmit diseases to humans. Benefits: None significant in a human-centric context; in natural environments, they play a minor role in decomposition.
Identified on: 8/27/2025