Subterranean termites are the most common termites here in Arizona.
The colonies are established by winged reproductives which usually appear “swarm” in the spring during the morning hours after a warm rain. If you do not notice the mud tubes subterranean termites create then the infestations may go unnoticed until this swarm happens in or around the structure. The “swarm” is a sign that a well-established colony is around the immediate structure. These subterranean termite colonies are located in the soil from which the workers build mud tubes to structural wood where they can then feed. These colonies are always connected to the soil and close to a moisture source as they need the moisture to survive.