Generally harmless to humans, Boxelder bugs are nuisance pests as they gather in large numbers on the warm walls of a home or business.
Boise is known as the City of Trees, and trees are boxelder bugs’ favorite food. There’s a wide variety of trees downtown, near the Idaho State Capitol Building. There’s also any number of large buildings that boxelder bugs like to bask on the sides of. This makes Boise a boxelder bug paradise.