Listen to a tale of long ago and then you will see why.
Once on a time, the people who lived together when the world was young took a certain man for their king. The four-footed animals also took one of their number for their king. The fish in the ocean chose a king to rule over them. Then the birds gathered together on a great flat rock, crying:
No, not all, for one old crow rose up and said, “For my part, I don’t want the owl to be our king. Look at him now while you are all crying that you want him for your king. See how sour he looks right now. If that’s the cross Look he wears when he is happy, how will he Look when he is angry? I, for one, want no such sour-looking king!”
Then the crow flew up into the air crying, “I don’t like it! I don’t like it!” The owl rose and followed him. From that time on the crows and the owls have been enemies. The birds chose a turtle dove to be their king, and then flew to their homes.