A katydid is a type of insect belonging to the family Tettigoniidae, commonly known for their resemblance to leaves and their distinctive, often loud mating calls. They are typically green or brown, which helps them blend into their surroundings as a form of camouflage. Katydids are primarily found in temperate and tropical regions and are known for their long antennae and robust bodies. They are herbivorous, feeding on a variety of plants.