Understanding sonograms

01 July 2000
Comments Main paper ABSTRACT Although sonograms are being used more and more to portray bird sounds, many people find them hard to understand. Once understood, however, they can be useful to the amateur as well as to the professional, so long as one does not try to read t...
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01 March 1971
Comments Reviews Wild Wings to the Northlands. By S. Bayliss Smith. Witherby, London, 1970. 208 pages; 24 black-and-white photographs. £1.50. Anyone might be forgiven for thinking, on brief acquaintance, that this is just another birdwatcher's travelogue full of sen...
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