It also has a link to the Zebra Finch Home Page in Australia. This page of class notes examines some of the whys of bird song. Not a lot here, but there are a few concepts offered that might interest inquiring minds. Lop off the may28.html from the URL and you can check out the class notes for the rest of the course. This attractive page by Tony Phillips plays bird songs when you click the appropriate bird image.
Songs are in au or aiff format.
This page is located at the British web site Portico, which provides access to information about all aspects of the services and collections of the United Kingdom's national library. It's technical, but intriguing, as he demonstrates how well his computer model is learning to sing a sparrow song, and speculates about how birds learn their songs. You can click text to hear the song of each species, click the photo to see a beautiful enlargement, or follow the link to the Cornell lab. This site is for scientist and citizen alike, with information, publications, a shop, and a searchable Library of Bird Sounds. The Cornell Lab of Ornithology is a membership institute dedicated to the study, appreciation, and conservation of birds.