What are subterranean termites?

Subterranean termites can cause the most damage of any termite species. These termites build distinctive tunnels, often referred to as “mud tubes,” to reach food sources and protect themselves from open air. They eat wood 24 hours a day, seven days a week, using their saw-toothed jaws to bite off small fragments of wood one piece at a time. Over time, subterranean termites can critically damage a building structure, sometimes causing a total collapse. Subterranean termites threaten homeowners across the country, as they’re found in every state in the U.S except Alaska.
What do subterranean termites look like?

There are three distinct types, or castes, of subterranean termites with physical differences, including reproductives, workers and soldiers.

The reproductives include the king, queen and alates. Integral to a colony’s growth, the queen is the largest termite while the king is much smaller. Alates, also known as swarmers, have long, dark brown to almost black bodies and translucent, slightly milky-colored wings. Their bodies typically measure about ¼ to ½ inch in length and their wings may have a few barely visible hairs. Unlike swarmers, workers and soldiers do not have wings. Workers are about ¼ inch or less in length are have cream colored bodies. They have small jaws that help them chew away at wood and move materials. Soldiers can be distinguished by their large mandibles. They have rectangular shaped heads and their bodies are flat and wide. Although their body is usually a creamy white color, similar to workers, their head is darker and more brownish in color.

Signs of an Infestation

Subterranean termite infestations can occur on the inside or exterior of the home. There are several telltale signs of a termite infestation. One sign is the presence of mud tubes on the exterior of the home. Mud tubes look like long tunnels made of wood and soil, which the termites construct to protect them from drying out as they travel. Other signs of a subterranean termite infestation include soft wood in the home that sounds hollow when tapped, darkening or blistering of wood structures, uneven or bubbling paint, and small piles of feces that resemble sawdust near a termite nest. Discarded wings near doors or on windowsills also indicate that swarmers have entered and infested the home.