The Geonosians are a fictional alien species from the Star Wars universe. They are known for their insect-like appearance, with elongated heads, large eyes, and a hard exoskeleton. Geonosians are native to the planet Geonosis, where they live in vast underground colonies and are skilled in building complex structures. Geonosians are primarily known for their role in the Clone Wars, where they were involved in the production of battle droids for the Separatists. They are also recognized for their unique ability to communicate through a series of clicks and whistles, which is essential for their social interactions and coordination within their colonies.