Scurrier/Legends
The scurrier was a rodent native to Tatooine, and was considered a pest by the locals of Mos Eisley. Scurriers had horns on their heads. Those of a male were thick and curved, while those of a female were thin and straight.
Characteristics

Scurriers were small omnivores with an appetite for garbage. They would scavenge in trash heaps in search of food and material for their nests. They were known to find their way aboard docked freighters and transports, thus propagating the scurrier population across the galaxy. Worse, scurriers had a penchant for picking apart machinery, a trait that was hardly welcome on a cargo- or passenger-filled transport.
Apart from this dangerous habit, scurriers posed only a marginal threat to sentients. Though they would fiercely defend their territory, scurriers usually fled at the first sign of danger (say, a passing landspeeder), able only to call upon a high-pitched squeak and a painful bite to use against advancing predators like womp rats.
Behind the scenes
The scurrier was a new creation for the Star Wars Special Edition. The computer-generated model was based on that of the velociraptor created for Jurassic Park.
Appearances

"Sandbound on Tatooine" – Star Wars Galaxy Magazine 10
- Star Wars: Episode IV A New Hope (First appearance) (Introduced in Special Edition)
"There's Many a Slip Betwixt Cup and Lip" – Mos Eisley Adventure Set
Sources
- Star Wars Trilogy Sourcebook, Special Edition
- Star Wars: Behind the Magic
Star Wars Customizable Card Game – Special Edition Limited (Card: Scurrier) (backup link) (First identified as Scurrier)