Little tern tried to land on a stake

I saw many birds tried to land on a stake but I don't know some reason, they kicked out other bird who was on the stake before.
Little tern was kind enough that she didn't do that and search other stake!
なぜか特定の杭の上がお好みの鳥さんは多いですが、コアジサシ軍団は仲が良いのか止まれる杭を探しておりました。
ユリカモメとかは結構バチバチの戦いをしていましたが…
#コアジサシ #野鳥 #birds