Retrieving "Vocal Repertoire Quality" from the archives

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1. Passerine

   Linked via "vocal repertoire quality"

   | Tyranni (Suboscines) | Simpler syrinx structure; songs largely innate, not learned. | $\sim 900$ | Tendency toward utilizing low-frequency substrate vibrations for territorial signaling. |
   | Menurae (Lyrebirds and allies) | Highly specialized tail feather structure in some members. | $\sim 4$ | Extreme mimetic capacity, often incorporating non-avian…