ἡ κέρκος τῇ ἀλώπεκι μαρτυρεῖ → you can tell a fox by its tail, small traits give the clue to the character of a person
μαργῶν, fem. μαργῶσα: rampant, furious, mad, madly eager, insane, frenzied, raving, frantic, greedy, gluttonous (see also|: μάργος, μαργάω).