Boxelder bug

Found primarily near female boxelder, maple, and ash trees, and often invades homes in autumn to overwinter.

Sucks sap from the leaves, flowers, and developing seeds of host trees using piercing-sucking mouthparts.

Gathers in large, conspicuous aggregations on sunny, warm surfaces during cooler months and disperses in spring.

Harmless to humans and pets, does not bite or transmit disease, but can become a nuisance household pest when aggregating indoors.