Boxelder bugs are attracted to several things, including:

• Food source: Boxelder bugs feed mainly on boxelder tree seeds and newly developing leaves, which may result in discoloration of the foliage. They also feed on the juice trapped in ungerminated seeds that have fallen off trees.

• Warmth: Boxelder bugs are attracted to sunny, heat-reflecting surfaces like windows, concrete, and homes with southern or western exposure. They tend to congregate in warm spots before migrating indoors to overwinter in insulated cracks and crevices.

• Shelter: Boxelder bugs are naturally attracted to warm, sheltered areas, which may bring them closer to homes. They tend to hide in small cracks and crevices in walls to insulate themselves from the cold winter temperatures.

• Mates: Boxelder bugs are also attracted to mates and covered habitats that protect them from the cold and predators.

To prevent boxelder bugs from invading homes in the fall, homeowners can repair holes in window and door screens, seal cracks and crevices with a good quality silicone or silicon-latex caulk, and install door sweeps to all exterior entrances. To get rid of boxelder bugs that have already entered a home, homeowners can examine where they congregate, such as around windows, door frames, siding, utility lines, or ventilation openings, and seal any gaps or cracks with caulk.