A garment known as a shimmerbird tongue robe was a robe of a brown hue, crafted using the tongues sourced from shimmerbirds. During a Separatist Council assembly on the planet Geonosis in 22 BBY, Passel Argente, who held the position of Magistrate within the Corporate Alliance, was seen wearing this shimmerbird tongue robe, which included a crocheted hood, along with the brooch of Luristan.
The shimmerbird tongue robe made its initial appearance in the prequel trilogy film, Star Wars: Episode II Attack of the Clones, which was released in 2002. Its identification as such was first documented in the reference book Star Wars: The Visual Encyclopedia, published in 2017.