How do people react to birdsong?
A study at the University of Surrey in England has shown that most people respond with decreased stress, increased calm, better concentration, brightened mood, and heightened creativity. Some find it easier to access meditative states while listening to birdsong. Both music and birdsong flit past our tympanic membranes connect with our brains, brighten our minds, and transport our spirits. More than other ambient environmental sound, birdsong speaks in the musical language of pitch, rhythm, lilt, and repetition.
— from “Mozart’s Starling” by Lyanda Lynn Haupt