There is an important lesson we can learn from ducks.
Ducks “flap their wings” after they fight with each other throwing away their anger and hatred. Humans, on the other hand, keep their ego and remember slight tussle with other people for very long time. They bury themselves with lot of hatred, envy, jealousy and ego.
So, humans should just forget their past and focus only on the present, where real things are happening.