Tidal variation in numbers of waterbirds: how frequently should birds be counted to detect change and do low tide counts provide a realistic average?: Capsule Variation in numbers needs to be assessed at both site- and species-specific levels, but low tide counts are representative of average usage in most cases.

Author： Burton Niall H.K.   Musgrove Andrew J.   Rehfisch Mark M.  

Publisher： Taylor & Francis Ltd

ISSN： 0006-3657

Source： Bird Study, Vol.51, Iss.1, 2004-03, pp. : 48-57

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