Happy new year!
Termites have lived longer than the dinosaurs and continue to eat their way through all the wood they can find. Termites are 24/7 bugs, which means they eat non-stop - 24 hours a day, seven days a week. They have hard, saw-toothed jaws that help them to eat lumber, wallpaper, plastics and fabric make of plant fibers. These pests cause up to $2 billion of damages per year.
Termite Fact: The total weight of all of the termites in the world is greater than the weight of all the humans in the world... Believe it or not... (don't ask where I get this stuff).
The photo is the work of Western subterrean termites in Walnut Creek. Where moisture regularly collects inside the wall or other cavities of a building, say from faulty plumbing or broken roof tiles, the Western subterranean termite can develop a subsidiary colony nest.
They build a central colony nest from which they construct underground tunnels that radiate within a 100 yard radius from a central colony nest in search of a timber (cellulose) food source.
Termites travel in humidified mud-shelter tubes or galleries... Western subterranean termites travel in these mud shelter tubes as protection from predators, sun-burn, dehydration and to maintain a high humidity environment which is essential for their survival.
I'm not the termite guy, but when I see evidence of these wood destroying organisms... It's in my report with a photo.