Because the approach of this splendid CD is so straightforward, its value may best be explained by a first-person account of a user.
I've been enjoying backyard birds in my home in Costa Rica and now in Indiana for many years. Yet I've only rarely felt confident about linking a bird's song to its appearance. I guess I'm a visual guy. Birdsong sounded good but taught me almost nothing.
Then a helpful attendant in a Wild Birds Unlimited store steered me towards this Peterson Field Guides cd. I'm an admirer of the Peterson Field Guide books, so this was an easy sale.
Since then I've listened through the guide three or four times in my car. Already, I find my ears picking up on a particular birdsong when I'm not even paying attention. Typically, I look up and - mirabile dictu - there's the bird I've learned, almost unconsciously, to identify by its song before it appears before the eye.
That's good pedagogy. This is a good product.
Cheep. Cheep. And so much more.