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Are there several species of 'Common' Crosbill Loxia curvirostra in The Netherlands?

Pim Edelaar, Auteur ; Magnus Robb, Auteur ; Kees van Eerde, Auteur ; Kees Terpstra, Auteur ; Rob Bijlsma, Auteur ; Erik Maassen, Auteur

Dans Limosa (77(1) 2004)

Recent studies have shown that in The Netherlands the Common Crossbill occurs in several 'vocal types'. Vocal types are discrete groups of individuals that are categorised by their flight and excitement calls (Fig. 1). The biological and taxonom[...]

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