The high flyer bird saw the happily swimming duck. It grew envy because it can’t swim. Swish, here the high flyer bird comes down to create an embarrassment for the happily swimming duck.
The duck was chased by the high flyer bird. Every time the bird sees the duck peacefully swimming around, it just comes down to harass the poor duck. The duck is seen bewildered by the unexpected attack from the sky and trying to escape the attack by frantically swimming around for a hiding place.
Some bad people are also like this high flyer bird. They don’t like others enjoying life, and try to disturb their peace of mind by their bad motives.