A neat story...
Mother Falcon sent her daughter out to get dinner.
Daughter Kite grabbed a duckling and came home.
Mother Falcon praised her daughter, then asked... "what did Mother Duck do when you stole her child?"
"Nothing. She just walked away."
"You must return the duckling then. This silence is ominous."
Daughter Falcon did as she was told, and came back to her mother with a chick.
"Ah! And what did Mother Chicken do when you stole her child?"
"She cursed me, mother, and threatened the both of us."
"Then we can have dinner now, there is nothing to be feared from those who shout."
The moral (according to the source)... never kill a man who says nothing.