Darkling beetle (likely a flour beetle)

Stored-food environments such as pantries, grain bins, mills, and animal-feed storage; often found in flour, cereals, and other dry goods.

Adults and larvae feed on flour, grains, cereal products, seeds, and other dried plant materials, and may consume mold or damaged grain.

Nocturnal, secretive, and capable of rapid reproduction in warm stored products. Larvae develop within infested food, while adults commonly wander away from the source.

Not dangerous to people and does not bite, sting, or transmit disease, but it contaminates and spoils stored food. It has little meaningful ecological benefit indoors, though related darkling beetles help recycle organic matter outdoors.