オサンポ take a walk - 壁からぶら下がる蓑虫 a bag worm hanging on the wall

花壇フチ
蓑虫が居る
五月晴れ

At the edge of the flowerbed
The bagworm hanging
In May fine day

なんで木からぶら下がらず、花壇フチなのか…。気まぐれな蓑虫かな…(？)。

Why, isn't he(she) hanging on a tree, on there?
He(she?) Would be feeling like doing that today...(?)