A bird that became a balloon. I waited for birds and found a swelling bird when I was observing. It looked like I was staring at this place. I will not do anything. Family. There were lots of birds （Black kite,Osprey,Common kestrel ）around, but I'm not sure if it was inflated by intimidation. I was surprised when I saw this scene for the first time. Even though it is usually a small bird.