Software can decode bird songs http://www.bbc.co.uk/news/science-environment-28358123
Automatic large-scale classification of bird sounds is strongly improved by unsupervised feature learning https://peerj.com/articles/488/ Large-scale analysis of frequency modulation in birdsong data bases http://onlinelibrary.wiley.com/doi/10.1111/2041-210X.12223/suppinfo
