Abstract
PRECISE knowledge of the standing of particular birds in Britain should result from the increasing number of national censuses which have been initiated in recent years. Where the statistical information is thorough, it will form an invaluable basis of comparison with similar data gathered in future years; even where statistics have been dropped and reliance is placed upon the opinions of many observers scattered over a wide area, the consensus of opinion may still be a reliable guide to the fluctuations of the population.
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R., J. Decrease of the Barn Owl in England and Wales. Nature 133, 768 (1934). https://doi.org/10.1038/133768a0
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DOI: https://doi.org/10.1038/133768a0