The destructive or dark flour beetle (Tribolium destructor), one of the species of darkling beetle known generally as flour beetles, is a common pest insect known for attacking and infesting stored flour and grain. It is a very dark brown beetle (darker than other Tribolium species) 5–6 mm. long. T. destructor is found in North America, Europe and Africa. As well as damaging flour and grain, it attacks animal food pellets, rolled oats and poultry food.