darkling beetle (corticeus unicolor, hypophloeus unicolor, hypophloeus castaneus), beetles on wood

animal invertebrate insect arthropod beetle pest red fly weevil spider wildlife moth food leaf flower darkling corticeus unicolor hypophloeus castaneus beetles wood darkening-beetles tenebrionid darkly animals species beetle bark museum unicolor rare extreme close-up animalia closeup close hexapoda science darkling darkling-beetles tenebrionoidea corticeus nature macro wildlife invertebrate insect tenebrionidae wild animal bug one arthropod coleoptera fauna color black magnification imago wood close environment hole brown tree arthropoda