Composers from Vivaldi to Beethoven have been inspired by birdsong. But how similar is birdsong to the music we create? Two recent studies offer contrasting answers. One analysis used nearly 250 song examples of the Nightingale Wren, pictured here, a tropical bird widely admired for its haunting song. It concluded that Nightingale Wren songs only rarely accord with our harmonic intervals. However, analysis of Hermit Thrush songs revealed a harmonic structure that was similar to human music at least 70% of the time.  Learn more at BirdNote.org.