Jawa
Jawas are humanoids who live on Tatooine in Star Wars. Those seen have existed primarily as technological scavengers, gathering abandoned droids, vehicles, and machines to resell them to other inhabitants of the planet.
Physiology
Jawas are small for humanoids, standing about one meter tall. They have orange eyes that glow brightly; the function of the glow is unknown. All Jawas seen have been covered from head to toe in robes and wrappings, so their true appearance is a mystery.
Their only known weapon is an ion rifle used to disable wandering droids for capture.
Jawa Society
Jawas are organized into clans based around Sandcrawlers: ancient treaded mining vehicles. Occasionally these congregate in Swap Meets.
Jawa populations have established themselves on other arid worlds. Presumably some jawas are able to purchase passage on transport ships.
Threat Assessment
Jawas appear to be opportunists who are willing to "kidnap" wandering droids and may be willing to rob isolated civilians, but they don't appear to have sufficient resources to be a significant power even on Tatooine.
They have no known spacecraft, but Jawas are sometimes found on other arid planets. Presumably they have migrated to other worlds as passengers.