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Article
Rob S. A. van Bemmelen, Auteur ; Sjoerd Duijns, Auteur ; Laura L. Govers, Auteur ; Ruben C. Fijn, AuteurMovements of birds foraging in intertidal areas are often strongly linked to the tidal cycle, as water levels determine where and when birds can forage. The strength of this link likely depends on the ability to forage in habitats other than int[...]
Article
Sjoerd Duijns, Auteur ; Nur Annis Hidayati, Auteur ; Theunis Piersma, AuteurCapsule Across the European wintering range Bar-tailed Godwits Limosa lapponica lapponica selected polychaete worms and especially Ragworms Hediste diversicolor, with differences between areas due to variations in prey availability.Aims To deter[...]
Article
Sjoerd Duijns, Auteur ; Jacintha G. B. van Dijk, Auteur ; Robert H. S. Kraus, Auteur ; A. Christa Mateman, Auteur ; Bennie van den Brink, Auteur ; Pim Van Hooft, AuteurAdult Barn Swallows Hirundo rustica exhibit strong sexual size dimorphism in the length of the outermost tail feathers, which are longer in males compared with females. This trait is traditionally used to sex adult Barn Swallows in the field. Ho[...]
Article
Sjoerd Duijns, Auteur ; Jacintha G. B. van Dijk, Auteur ; Bernard Spaans, Auteur ; Joop Jukema, Auteur ; Willem F. de Boer, Auteur ; Theunis Piersma, AuteurDifferent spatial distributions Of food abundance and predators may urge birds to make a trade-off between food intake and danger. Such a trade-off might be solved in different ways in migrant birds that either follow a time-minimizing or energy[...]
Article
Sjoerd Duijns, Auteur ; Joop Jukema, Auteur ; Bernard Spaans, Auteur ; Peter van Horssen, Auteur ; Theunis Piersma, AuteurTwo populations of Bar-tailed Godwits Limosa lapponica occur along the East-Atlantic Flyway. The European population (L. I. lapponica) is supposed to breed in northern Scandinavia and has been suggested to only winter in Europe. The Afro-Siberia[...]
