After receiving a report from a citizen who had been attacked on the street by a crow watching over its nest, employees of Tokyo's municipal government moved the nest to a storage warehouse. I heard a strange story that the nest was made with things like clothes hangers, so I went to investigate. Luckily, I was able to find the warehouse. The only way to tell that it was a nest was the egg resting in the center. The municipal workers who cleared the nest explained that "the crow borrowed metal hangers a little at a time from apartment balconies, and skillfully formed the base structure with its beak. It used just about anything, including twine and vinyl fibers." The completed nest resembles a modern work of recycled art. From the day on, I started to be drawn to the trees of the city.