Huge Library of Animal Sounds and Videos

The Cornell Lab of Ornithology has placed sounds and videos from the Macaulay Library of Natural Sounds online in a very neat website at animalbehaviorarchive.org. The online library contains more than 80 years of recordings, including 67% of the world's birds. In all, there are more than 160,000 recordings, including videos of more than 3,000 species. They even built a program called RavenViewer that will draw live spectrograms & waveforms while you choose from a variety of settings.