Observer variation in estimates of Meadow Pipit Anthus pratensis and Skylark Alauda arvensis abundance on moorland: Capsule Counts least susceptible to observer effects were those within 25 m of a transect and the total number along a transect, with observer effects greater for distance sampling.

Author: Buchanan Graeme M.   Pearce-Higgins James W.   Grant Murray C.  

Publisher: Taylor & Francis Ltd

ISSN: 0006-3657

Source: Bird Study, Vol.53, Iss.1, 2006-03, pp. : 92-95

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