Carpenter Ants have one node and come in many varieties with different sizes and colors - tan, red, black. Carpenters hollow out dead, moist wood in trees, firewood, and fence posts to build nests but they don't eat wood. Inside, they build colonies in wall voids, foam insulation, eaves, crawl spaces. Found throughout U.S., they feed on insects and insect secretions during the summer but often invade structures in spring and fall looking for other food sources. Forage at night during summer months. Likes sweets. May switch off a bait.