Boxelder bug

Found near boxelder, maple, and ash trees, often aggregating on sunny exterior walls of buildings during autumn.

Feeds primarily on juices from seeds, leaves, and stems of boxelder, maple, and ash trees using piercing-sucking mouthparts.

Gathers in large, conspicuous groups on warm surfaces to sunbathe. Overwinters as an adult in sheltered crevices, homes, and other structures.

Harmless to humans as they do not bite, sting, or transmit disease. However, they can become a major indoor nuisance and stain fabrics with their excretions.