Instruct: Classify a given review as either positive or negative.
Query: Birding by Ear

This is a great intro to bird songs. It has many common birds as well as several I had rarely seen but often heard. Its strength is that it is arranged in groups of similar-sounding birds, with narration that ties them together with memorization clues. This makes listening on my way to work amusing, and memorization not too tough. The weakness is that it is not easy to find the song of a particular bird if you want to identify something you just heard. A good companion would be a CD with lots of individual songs easily searchable, although such a format would not be nearly as easy to listen to for more than a few minutes.On the whole, a great start. Bike rides are more fun too, since you always hear more birds than you can see. After two years of listening to this each spring, I'm ordering the sequel, More Birding by Ear, as well as a more complete song collection for searching.