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1. Passerine

   Linked via "Note Transition Entropy"

   Passerines are renowned for their sophisticated vocal capabilities, facilitated by a highly specialized vocal organ, the syrinx. Unlike many other bird groups, the passerine syrinx typically possesses specialized muscles allowing for the production of two distinct notes simultaneously, contributing to the complexity observed in their songs.
   The complexity of passerine song is quantifiable through advanced [spectral…