Fall Invaders
Stink bugs, Asian lady beetles, boxelder bugs, and cluster flies invade Maine homes every fall seeking warmth.
About Fall Invaders in Central Maine
Every autumn in Central Maine, several insect species seek shelter inside homes to overwinter. Brown marmorated stink bugs emit a foul odor when crushed or disturbed. Asian lady beetles (often mistaken for ladybugs) congregate on sunny exterior walls and enter through gaps around windows and doors — they bite, stain surfaces, and trigger allergies. Boxelder bugs cluster on warm, south-facing walls. Cluster flies, larger and slower than house flies, pack into attics and wall voids by the thousands. These pests don't reproduce indoors, but they emerge on warm winter days and become a major nuisance. The best strategy is prevention — sealing entry points before fall arrives.
Signs of Fall Invaders
- Large clusters of insects on sunny exterior walls in autumn
- Finding stink bugs, lady beetles, or boxelder bugs on windowsills
- Slow-moving cluster flies appearing indoors on warm winter days
- Staining on walls or curtains from crushed beetles
- A pungent smell when stink bugs are disturbed or vacuumed
Prevention Tips
- Seal cracks around windows, doors, soffits, and utility penetrations before September
- Install door sweeps and repair damaged window screens
- Apply exterior barrier treatments in late summer before migration begins
- Vacuum up invaders rather than crushing them (especially stink bugs)
- Reduce exterior lighting or switch to yellow bulbs to attract fewer insects
Did You Know?
- 1.Asian lady beetles release a yellow, foul-smelling fluid when threatened
- 2.Cluster flies parasitize earthworms during their larval stage
- 3.The brown marmorated stink bug is an invasive species from Asia, first detected in the US in 1998
Need Help With Fall Invaders?
Our general pest control service targets fall invaders at the source. Contact us for a free inspection and quote.
