Singing Insects are a type of insect that produce sound by rubbing their wings together or by stridulation. The two most common singing insects are the GRASSHOPPER and the KATYDID. Grasshoppers are large, long-legged insects with powerful hind legs used for jumping. They have wings and can fly short distances. Katydids are smaller than grasshoppers and have a more slender body. They are usually green or brown in color and have long antennae. Both grasshoppers and katydids produce sound by rubbing their wings together or by stridulation.