Have you ever seen a flash of color, heard a whistling song and wondered what bird just flew by? Then bird-watching might be a great hobby for you! Other than a willingness to look carefully and ...
Copyright of bird-song recordings held by the Cornell Laboratory of Ornithology and the Borror Laboratory of Bioacoustics. Booklet entitled, "Birding by ear : a guide ...
https://siris-libraries.si.edu/ipac20/ipac.jsp?&profile=liball&source=~!silibraries&uri=full=3100001~!1061131~!0#focus ...
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