Bug Identifier
Longhorned ground beetle (likely a flat-headed wood-borer beetle)
Community identification

Longhorned ground beetle (likely a flat-headed wood-borer beetle)

Likely *Callidiellum* or a related Cerambycidae genus; species cannot be confirmed from this image

Order & Family
Coleoptera, Cerambycidae (longhorn beetles)
Size
Approximately 10–20 mm body length; antennae may extend well beyond the body.
See this bug in the Encyclopedia

Natural Habitat

Adults occur on or near dead, dying, or recently cut wood, including firewood, timber, and wooden structures. Larvae develop inside wood beneath the bark.

Diet & Feeding

Larvae feed on wood, especially weakened or dead coniferous wood; adults typically feed little or consume pollen, nectar, sap, or bark.

Behavior Patterns

Adults are usually nocturnal or attracted to lights and may appear indoors after emerging from firewood or structural timber. Larvae tunnel under bark and through wood during development.

Risks & Benefits

Generally harmless to people and pets and does not bite or sting. Larvae can damage firewood or wooden structures, while the beetles contribute to decomposition and nutrient cycling.