Eagle has landed 任務完了 Mission accomplishedhoming pigeon 伝書鳩cook-a-doodle-doo コケコッコー Hen 雌鳥 Rooster 雄鶏which comes first a chicken or egg dilemma 鶏が先か卵が先かchicken and egg situation 鶏が先か卵が先かvulture 禿鷹eagle 鷲…