The bird wanted the fish to feel
How free it was to fly
He plucked the fish from the sea
And got angry when it died…

MG

[Moral]
Acceptance and cooperation
The bird is freest when flying in the sky, whereas the fish is freest in the water.
The bird imposed its own understanding of freedom on the fish then was disappointed that the fish could not fly.

[Lesson]
The problem was that the bird did not adjust its expectation, but the solution was that the bird could adapt.
It just ate the dead fish.