http://www.birds.cornell.edu/MacaulayLibrary/

Literal:
The Macaulay Library is a principal source of sound recordings for basic research, education, conservation, habitat assessment, media, and commercial projects. The collection is strongest in New World species but also has substantial holdings from Africa and Madagascar, Europe, the former Soviet Union, and South East Asia. The Library archives and preserves an exhaustive sampling of the behaviors of each animal species using digital video and audio recordings.

For more than 80 years we have prided ourselves on maintaining and distributing recordings of the highest quality. Our collection of natural sounds includes more than 160,000 recordings, comprising 67 percent of the world’s birds, and rapidly increasing holdings of insects, fish, frogs, and mammals. The video collection includes more than 3,000 species and we are rapidly increasing the breadth of our holdings by adding assets filmed in high definition.