(2-CD Set) Here are two CDs, each 69 minutes long, concerning birds living in those habitats least affected by man: lowland and mountain forests, cliffs and scree, alpine meadows and mountaintop tundra. The CDs enable the listener to readily identify the calls and songs of these often difficult to see birds. Accompanied by a 32 page booklet which includes sound descriptions and a color picture of each of the 81 species on the two CDs.