28383a4e_n_Termites_vs_Drywood_Termites__Subterranean_Termites
[0] Do they need moisture? [Drywood Termites] Less water needed. They can live more on the moisture supplied inside the wood. [Subterranean Termites] 
Yes, it is necessary for an outside source of water to be present, such as a leak or rainwater.
Different Types of Termites: Subterranean Termites vs Drywood Termites
Subterranean Termites