I, too, have wondered these things about grasshoppers. I've written about them too! Funny little things. Anyway, you peaked my curiosity enough to find this article https://animalcorner.org/animals/grasshopper/#:~:text=Grasshopper%20Behaviour&text=Most%20species%20are%20solitary%20and,or%20even%20billions%20of%20individuals.

Your photos are lovely.