What is a mud tube?
Mud tubes are tunnel-like structures that are built by subterranean termites. They are made of dirt, wood, and termite saliva and feces. The structure of the tunnel is uneven in shape and can range from ¼ - 1 inch in diameter, but they are most often approximately pencil-sized.What are the purposes of mud tubes?
Subterranean termites require humidity and moisture to survive. They are very susceptible to drying out, so they must remain in a moist environment. The termites will build these tunnels from the soil, where they live, to the source of their food. The tunnels not only keep the humidity high while the termites travel, but they also protect them from predators. There are 4 types of tunnels that have slightly different purposes.- Working tunnels: These tunnels, sometimes also called utility tunnels, form a path between the termites’ nest underground to the wood that the termites eat. They are tunnels that are thicker and made to last.
- Exploratory tunnels: When termites are looking for a food source, they build thin, more fragile tunnels simply to allow them to explore the area. If they do not find wood, they will abandon these tunnels. You can tell an exploratory tunnel because it is a path from the soil that stops before meeting wood.
- Drop Tubes: Tunnels that are suspended from wood back to the ground are known as drop tubes. They often look like thin stalactites hanging from a surface. Drop tubes are typically composed of more wood, so they may appear lighter in color.
- Swarm tubes: These are particularly wide tunnels that protect the reproductive swarmers that are getting ready to leave the nest. They can be up to 3-4 feet wide and are temporary.