What Is The Difference Between Grasshoppers And Crickets?

While they're in the same general class of insects, there are some differences:
Crickets are mostly nocturnal (active at night) and grasshoppers are diurnal (active in the day). Because of this, crickets use their song to communicate in order to find females and warn off other males. Grasshoppers call in the day also but tend to be located high in the vegetation to see and be seen by other grasshoppers.
Grasshoppers blend into the grass, but they also often have brightly colored under wings that they flash when they make short flights from place to place and also make noise when they do this. Crickets then to be dark to blend into the shadows or are pale green or brown to blend into the vegetation. The wings of a cricket are either absent or atrophied and they don't fly.
Crickets have longer antennae than grasshoppers.
The ears of a cricket are located in its legs and a grasshopper's are in its abdomen.