Do you see a mud trail like this running up the side of your home? Then you could be in for a surprise…you have termites! You’ll most often find these tunnels, also called shelter tubes, along external walls or in crawl spaces. If there is a large or long-term infestation, there can sometimes be shelter tubes created on internal home walls. If you see a tunnel like this on your home, be sure to call a pest control professional immediately!