We just ran across the wonderful BirdNote website that archives the NPR shows that are two-minute vignettes. The audio show captures the rich sounds of birds with stories that illustrate the interesting—and in some cases, truly amazing—abilities of birds.
Sample one of their shows: Laughing Kookaburra of Australia
If you’re a birder or just a curious about bird songs and calls, check this site out: http://www.birdnote.org/