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.

By Burton Niall H.K.   Musgrove Andrew J.   Rehfisch Mark M.  

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

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Counting birds on farmland habitats in winter: Capsule Perimeter counts underestimate the number of birds using agricultural fields.

By Atkinson Philip W.   Fuller Richard A.   Gillings Simon   Vickery Juliet A.  

Bird Study, Vol. 53, Iss. 3, 2006-11 ,pp. : 303-309

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Effects of weather and timing on counts of breeding Snipe Gallinago gallinago: Capsule Snipe numbers are assessed most accurately at dusk and at low wind speeds.

By Hoodless Andrew N.   Inglis John G.   Baines David  

Bird Study, Vol. 53, Iss. 3, 2006-11 ,pp. : 205-212

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Surveying waterbirds away from major waterbodies: implications for waterbird population estimates in Great Britain: Capsule Population size estimates of widely dispersed waterbird species in Great Britain were improved using a stratified random sample of habitats in addition to standard counts of known wetlands.

By Jackson Sarah F.   Austin Graham E.   Armitage Michael J. S.  

Bird Study, Vol. 53, Iss. 2, 2006-07 ,pp. : 105-111

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Birds breeding in British gardens: an underestimated population?: Capsule More birds breed in gardens than previous estimates suggest.

By Bland Richard L.   Tully John   Greenwood Jeremy J.D.  

Bird Study, Vol. 51, Iss. 2, 2004-07 ,pp. : 97-106

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