It means that it feeds on worms, caterpillars or worms.
It feeds on worms or earthworms. It is formed by the vermis voices ("worm") and the suffix -voro ("that eats"), both Latin.
Adj. masc. Preferential or exclusively feeding consists worms. Word of Latin style composed by the substantive "vermis": worm, and the verb «vorare»: devour. Synonym: escoléfago, from the Greek "skóoleex": worm, and «phagéin»: eat.