Even though it wasn’t a great distance, more and more birds kept appearing, so I couldn’t move forward. Finally, I reached the beach.
As a side note, a ranger in Hokkaido, to whom I mentioned that I wanted to see a Common Raven, once sarcastically said that it would be absolutely impossible for an amateur (even we struggle to see them with great effort, he said). I thought it must be an incredibly cautious bird. But it turns out they fly nearby quite normally. Not just ravens, but birds in Japan, especially in the suburbs, seem to be particularly cautious. Birds are supposed to move around, but why does it seem that the caution distance varies depending on the habitat area at that time? Can anyone explain this?