Grasshoppers often eat smelly leaves, such as eucalyptus leaves, and then spit on themselves. Sometimes I eat the leaves of various broad-leaved green plants, especially grass. When the locust plague occurred, swarms of locusts traveled thousands of miles on bare land.

Some grasshoppers, usually males, use their wings to make "music" to attract their mates and tell other male grasshoppers to leave here. Different kinds of grasshoppers make "music" in different ways. Some scrape the edge of the front wing with the sharp fork of the hind leg, or let the wings rub against each other to make a sound.

Extended data:

Perhaps because grasshoppers are "high protein" creatures, they often become one of the "recipes" of lizards. So in order to escape, grasshoppers often eat smelly leaves, such as eucalyptus leaves, and then spit on themselves. Whenever a "carnivore" such as lizard is ready to swallow a grasshopper with vomit, it will spit it out immediately, because the vomit tastes really bad, so it will not hurt the grasshopper's "bones and muscles".

In fact, the grasshopper's hind legs are only suitable for jumping, so it looks awkward when walking. When the grasshopper is ready to jump, its four calves prop up the first half of its body, bend its hind legs, and then suddenly straighten its body and shoot itself into the air. Jumping forward like this is 10 times faster than most running bugs.

References:

Grasshopper-Baidu encyclopedia