http://www.modernperlbooks.com/mt/2013/02/goodnight-parrot.html http://www.modernperlbooks.com/mt/2013/02/goodnight-parrot.h... https://www.ohloh.net/p/parrot

http://www.modernperlbooks.com/mt/2013/02/goodnight-parrot.html http://www.modernperlbooks.com/mt/2013/02/goodnight-parrot.h... https://www.ohloh.net/p/parrot https://www.ohloh.net/p/parrot (contributor graph at the bottom)