Mangoverde World Bird Guide
- Volunteer project includes links to over 3,000 sounds for over 1,500 species of birds.
- http://www.mangoverde.com/birdsound/

Greg Kunkel's Birdsongs
- A description of sonagrams for the identification of birds. Includes technical descriptions of how the songs were recorded
- http://www.bio.umass.edu/biology/kunkel/gjk/homepage.htm

Animal Sound Recordings
- Table including sound files and a log of the place they were recorded.
- http://www.avisoft-saslab.com/sounds.htm

North American Bird Sounds
- Wav files of various North American birds.
- http://www.naturesongs.com/birds.html

Songs of Brazilian Birds
- Features sound clips of 51 different species.
- http://www.mma.gov.br/ingles/cgmi/cantoave/canto.html

Bird Sounds from Nature's Helpers
- Listen to a few birds including cuckoos, owls, and doves.
- http://www.prestogalaxy.com/html/birdssounds.html

Bird Songs
- Calls and songs of some New York state birds, organized by type of bird.
- http://www.math.sunysb.edu/~tony/birds/index.html