Wolf in Wikipedia
Wolf. - Frequently mentioned in the Scriptures as a special foe to flocks (Sirach 13:21; Matthew 7:15), and an emblem of treachery, ferocity, and bloodthirstiness. Wolves usually prowl at night around the sheepfolds, and, though fewer in numbers than jackals, are much more harmful. The tribe of Benjamin, owing to its warlike character, was compared to a wolf.