A yellow leaf seemed to be was flying or hovering on the premises of Hokkaido University.
Can you find the leaf on the left ?
A transparent thin string connected the leaf to the branch of the tree. It did not seem to be the art of a spider. A caterpillar created such long string and enjoyed swinging in the air.
You can walk around this pastoral area in Hokkaido University that shows beautiful autumnal foliage every year. It is at the north end of the premises.