Araya-Salas M, Wright T. Data from: Open-ended song learning in a hummingbird.  2013.

Araya-Salas M, Wright T. Open-ended song learning in a hummingbird. Biology Letters. 2013;9(5):20130625 - 20130625. Available at: http://rsbl.royalsocietypublishing.org/cgi/doi/10.1098/rsbl.2013.0625.