I was filming video in Hungary about Hortobagy Natural Park and then unexpectedly found out that in these days should be a natural phenomenon which occurs only once in a year, only in this week in early June, and only in the river Tisza. I was nearby and couldn't missed it.
It's called Blooming of Tisza river, the blooming is actually mating period of Mayfly. They live only about 2-3 hours and during these 3 hours they have to mate and lay their eggs. Then they die.
I've see thousands and thousands of them appearing almost at the same time, and then after few hours everything was empty again.
It was spectacular, but also weird, but also beautiful. In a way.
https://youtu.be/dNwHuxqaUXY?si=vybFGsvV4peCN52v
