Research highlighted on International Dawn Chorus Day, suggests that the common nightingale is top of the feathered crooners because of the composition of its brain.
The nightingale's vocal range has far more notes than any other species.
Researchers at the University of Bath and Cornell say that 'it is possible to draw parallels between the ways in which the bird brains have developed to learn complex songs and the way human brains have evolved to allow language.'
http://www.theguardian.com/environment/2014/may/04/nightingale-best-birdsong-brain-research
