Awesome. I've checked out the Macaulay library a few times in the past looking for samples for electronic music. It's a great resource, and has features like rating by audio quality. Check out the unearthly vocalizations of various Oropendolas:
http://macaulaylibrary.org/search?&asset_format_id=1000&coll...
At around 0:25 in this recording is an example of what I mean, but each member of the genus has its own distinct calls/songs: