Termites mostly feed on dead plant material , generally in the form of wood , leaf litter , soil , or animal dung , and about NUMBER@1 % of the estimated NUMBER@2 species -LRB- about NUMBER@3 taxonomically known -RRB- are economically significant as pests that can cause serious structural damage to buildings , crops or plantation forests .

Termites mostly feed on dead plant material , mostly wood , leaf litter , soil , or animal dung . About NUMBER@1 % of the estimated NUMBER@2 species -LRB- about NUMBER@3 taxonomically known -RRB- are economically significant as pests that can cause serious structural damage to buildings , crops or plantation forests .
