Baalzebub can fly/float. He can see invisible creatures. He is poisonous if eaten.

The "lord of the flies" is a translation of the Hebrew Ba'alzevuv (Beelzebub in Greek). It has been suggested that it was a mistranslation of a mistransliterated word which gave us this pungent and suggestive name of the Devil, a devil whose name suggests that he is devoted to decay, destruction, demoralization, hysteria and panic... Notes on Lord of the Flies, by E. L. Epstein