Hungry as a dog.
In Latin, “Rabidus fame, ceu canis”.
Hungry as a hawk.
Hungry as a hunter.
Hungry as a kite.
In Latin, Milvinam appententiam habere. (Plautus.)
Hungry as a wolf. In French, “Avoir une faim de loup.” Another French phrase is “Avoir un faim de diable.”
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894