sentences:  Insects such as clothes moths, carpet and larder beetles may consume all but the most indigestible nest elements, typically feather shafts.Young nesting swifts are able to survive for a few days without food by dropping their body temperature and metabolic rate, entering a torpid state.Except when nesting, swifts spend their lives in the air, living on the insects caught in flight; they drink, feed, and often mate and sleep on the wing.