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Documents disponibles écrits par cet auteur (5)
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Article
Hans Kallander, AuteurCapsule In autumn, Rooks cached large quantities of acorns, which were retrieved during winter. Aims To describe the autumn storing of acorns by Rooks in a natural situation and to quantify the retrieval of acorns during winter. Methods The coll[...]
Article
Hans Kallander, AuteurThe diurnal and seasonal occurrence of flight foraging for midges (Chironomidae) by Black-headed Gulls Chroicocephalus ridibundus was studied at a shallow semi-eutrophic lake in South Sweden and their capture rates were recorded. The gulls captu[...]
Article
Hans Kallander, AuteurFlock-fishing, i.e. when a tight group of birds moves in a coordinated way under more or less synchronous diving, is common in cormorants Phalacrocorax spp. and mergansers Mergus spp., but is said in the major handbooks not to occur in Great Cre[...]
Article
Jan-Ake Nilsson, Auteur ; Hans Kallander, AuteurTo evaluate the importance of tree leafing for the start of laying and clutch size of birds, we compared the breeding phenology of great tits Parus major and blue tits P. caeruleus between one coastal and two inland sites in the same geographica[...]
Article
Hans Kallander, Auteur ; Dennis Hasselquist, Auteur ; Anders Hedenström, Auteur ; Andreas Nord, Auteur ; Henrik G. Smith, Auteur ; Jan-Ake Nilsson, AuteurThis study documents the advancement of laying dates in three species of tits (Paridae) in southernmost Sweden during recent decades, and the absence of a similar response in the pied flycatcher Ficedula hypoleuca. It is based on several differe[...]
