Hornet larvae, but not adults, can digest solid protein; the adult hornets can only drink the juices of their victims, and they chew their prey into a paste to feed to their larvae. The workers dismember the bodies of their prey to return only the most nutrient-rich body parts, such as flight muscles, to the nest. Larvae of predatory social vespids generally (not just "Vespa") secrete a clear liquid, sometimes referred to as "Vespa" amino acid mixture, the exact amino acid composition of which varies considerably from species to species, and which they produce to feed the adults on demand.