Got this at a Local Barnes and Knoble Book signing in 2000.

(About Lang)
Lang has been recording the sounds of nature since the late 1980's and is the owner of Nature Sound Studio located in Ithaca, New York. Lang has published numerous books, audio CDs and cassette tapes sharing the wonders of the world of nature sounds. Many of these are listed on the support site for his new bird book, The Songs of Wild Birds.

Lang's extensive collection sound recordings is available for commercial projects, and his recordings have been used in hundreds of museum and nature center exhibits, movies, and products featuring the sounds of nature