Termites cause over 5 Billion dollars worth of damage in the entire nation. Two major types of termites are subterranean termites and drywood termites. The difference being that subterranean termites have their nest or colonies under ground. Their colonies tend to be large and can have more than a million individuals. Drywood termites on the other hand live on the wood itself. Colonies are small relatively anywhere from less than a hundred to a few thousands. However, drywood termites spread much more quickly and can establish several colonies throughout a structure.