Ah, tell me more about it, I have never heard of it.
17 year cycles? Very interesting indeed!
In the US...maybe elsewhere as well??...there is a species of cicada that lives underground for 17 years. Then they all come above ground at the same time to mate.
By "all"...I do mean all! Literally millions all at once! Take a step and crush 3 of them under your foot kind of numbers!
One of my fondest memories of my rambunctious son was the last emergence. We were at the zoo watching all the animals enjoy their 17 year snacks
My 12 year old son is doing what kids do...running around like a goofball. He ran ahead and jumped to grab a low hanging branch. Hundreds of cicada shook loose and fell onto the group of young girls who then started screaming because there were bugs in their hair! I spent a l9ng time apologizing and I was not happy with him at the time. But I can still see that moment and now it makes me chuckle
Northern Illinois' next 17 year brood emergence is 2024.
Anyway, here is a little more info:
Every 17 years a swarm of cicadas appears in the northeastern United States. Why?
www.britannica.com