The tananger on the East Coast of the United States, where the forests are a little denser, has one kind of call, and the tananger on the other side, on the west  has a different kind of call.
風琴鳥はアメリカ東海岸の 少し深い森の中では こういう鳴き方をしますが 反対の西海岸では  違った鳴き方をします