Ahsoka Tano’s appearance has definitely evolved since her debut in Star Wars: The Clone Wars , but she’s always sported her distinctive head features. Over the years, many fans have been pretty curious about the scope of their purpose, and Cavan Scott’s new Jaws of Jakku audiobook ( via ScreenRant ) has finally revealed a bit more about them.

Ahsoka belongs to a species called the Togruta, whose head tails have two parts: the lekku (the tails themselves) and the montrals (the upper horn sections). This book, narrated by a Kessurian named Lisa, explains that their montrals have developed the ability to sense movement in the dark, in tune with a kind of echolocation previously hinted at in the Star Wars Rebels: The Visual Guide . Kessurians sprout spiny montrals above their ears

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