A chap had recently mentioned an intriguing find, found [here]. A programmer named Oona Räisänen had a dream, in that dream they dreamt of a blackbird speaking in human language, and when they awoke, there was a blackbird chirping outside the window. This served as inspiration for a speech to birdsong converter, there's a sample and [video] available on the blog.
Source code using the Perl-SoX-csdr command-line toolchain is available.