Or the way birds mate while flying in the air. I was using my least favorite lens because it was the only thing I had to get close enough to the Japanese crows (karasu) that were flying around Ueno park, which upon closer inspection of their flying patterns, I realized that they were mating. Japanese crows are rather large with very prominent beaks. Their daring yet elegant dance in the air captivated me more than the animals in the zoo. I'm hoping their acrobatics are captured in this silhouette of these two birds. This is SOOC.