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Swarms of red and black bugs are taking over Ontario homes right now

It's unfortunately that time of year again when masses of red and black bugs begin swarming homes in southern Ontario in an effort to escape the cold. Boxelder bugs (Boisea trivittata), are native to North America and get their name from the boxelder tree, whose seeds are a food source for the nuisance pests. During the fall, the red and black bugs often gather in huge clusters as they leave the trees where they live and feed on during warmer months to find warmer hiding spots in preparation for winter. As these insects seek out warmth, you'll notice that the bugs gather in the sunshine on the south side of buildings, trees, and rocks. However, when that heat is no longer sufficient, they'll eventually find ways to enter your home through cracks in the foundation and siding, gaps along windows, and virtually any other small opening. Photo: angelaprice/iNaturalist. The boxelder bug can be identified by its almond-shaped body, which is bl...


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