 Some caterpillars preferentially feed on the underside of leaves, where microclimate has higher relative humidity.In a highly time-consuming activity such as feeding, these insects significantly reduce their chances of desiccation.Cryptobiosis refers to the state of an organism that has no detectable metabolic activity, resulting from extreme and unfavorable environmental conditions; anhydrobiosis refers to the state of surviving the loss of (almost) all body water.