Is Your House Vacant, or Not?

Termites build "termite highways", commonly known as shelter tubes, to move back and forth from their colony to their food source.  These tubes are constructed of a combination of saliva, mud, and feces, and can range in color from light beige to a reddish brown.
The size of these tunnels or tubes can be several feet long and branching in different directions, or can be a slim track, only 1/8" wide and a couple of inches long.  They can be tough to spot, as is shown in the video below.

It pays to hire a licensed termite inspector.  Their trained eyes know where to look, and can detect even the smallest of termite signs.