This cyst, called a syrinx, can expand and elongate over time, destroying the spinal cord. Songbirds have a bifurcated sound producing organ called a syrinx. They also lack a pessulus, the bony central structure in the syrinx of songbirds. The position of the syrinx, structure and musculature varies widely across bird groups. Storks lack a syrinx and are mute. No New World vulture possesses a syrinx, the vocal organ of birds. Stanciu founded the Pan flute school "Akademie Syrinx". Because it lacks a syrinx, it can only utter hisses and grunts. Female vocalizations are higher in pitch because of a smaller syrinx in the larger sex. Because they lack a syrinx, their vocal display is limited to grunts and hisses. Some say "Syrinx" was originally written by Debussy without barlines or breath marks. Longus makes reference to Syrinx in his tale of "Daphnis and Chloe" in Book 2&colon;34. This could make the syrinx of the lyrebird more flexible. The second describes the love affair between Silenus and the nymph Syrinx. Lifeson recalled developing "The Temples of Syrinx" backstage at a gig in Sault Ste.