The Pacific dampwood termite is the largest species of termite in Washington. The winged form may exceed one inch in length (including the wings), and they are cream-colored to dark brown.
The soldiers have a large reddish-brown head, cream-colored body, and are approximately 3/4-inch-long, with the head and mandibles comprising about 1/3 their length. The Pacific dampwood termite colony consist of a queen, king and soldier caste. Since there is no worker caste, the nymphs of soldiers and reproductives perform the functions of a worker caste.
Wet or damp wood is necessary for attack by this species of termite. Wood to soil contact, leaky plumbing, leaky roofs and gutters, poorly ventilated crawl spaces, rain-soaked firewood leaning against a structure all contribute to infestation by the Pacific dampwood termite. It is important to note that this type of termite will not infest structurally-sound dry wood.