I can see fireflies in my garden this time of year. We call firefly/fireflies ホタル(蛍) in Japanese. I heard the word ホタル was derived from 火垂る. 火垂る is literally “fire dripping”.
By the way, to take a video of fireflies is very difficult for me, so the video is very very short. Strangely, I feel the firefly moving on the video is very faster than real one.