September 18th – September 22nd, 2025 is Autumn – End of HAKURO (White dew)-45th KOU “Swallows leave.”
Swallows are summer birds that migrate to Southeast Asia when it gets cold in Japan. Untill then, both parents and young birds spend their time in large groups building roosts. I guess they feel safer in a group at a roost.
At the end of March this year, I spotted a large group of swallows flying around the SAI River. This was shortly after they had migrated to Japan.
So, I thought that perhaps they would leave around here, but there were no swallows to be seen anywhere. Have they already gone to warmer regions?
Come to think of it, it seems that I haven’t seen them from around the end of August. It was still hot in Japan at that time, although.