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Article
Sissel Sjoberg, Auteur ; Gintaras Malmiga, Auteur ; Andreas Nord, Auteur ; Arne Andersson, Auteur ; Johan Bäckman, Auteur ; Maja Tarka, Auteur ; Mikkel Willemoes, Auteur ; Kasper Thorup, Auteur ; Bengt Hansson, Auteur ; Thomas Alerstam, Auteur ; Dennis Hasselquist, AuteurMigrating from hemisphere to hemisphere is a global strategy for many bird species. Despite allowing birds to track productivity, these long-distance movements bring them in contact with inhospitable regions such as deserts and oceans. Sjöberg e[...]
Article
Sissel Sjoberg, Auteur ; Lykke Pedersen, Auteur ; Gintaras Malmiga, Auteur ; Thomas Alerstam, Auteur ; Bengt Hansson, Auteur ; Dennis Hasselquist, Auteur ; Kasper Thorup, Auteur ; Anders P. Tøttrup, Auteur ; Arne Andersson, Auteur ; Johan Bäckman, AuteurRecent advances in tracking technology are based on the use of miniature sensors for recording new aspects of individual migratory behaviour. In this study, we have used activity data loggers with barometric and temperature sensors to record the[...]
Article
Martim Melo, Auteur ; Martin Stervander, Auteur ; Bengt Hansson, Auteur ; Peter J. Jones, AuteurThe São Tomé Grosbeak Neospiza concolor, endemic to the island of São Tomé (Gulf of Guinea), is one of the least known birds in the world. Formerly considered to be an aberrant weaver (Ploceidae), it is currently placed in a monotypic genus with[...]
Article
Csaba Moskát, Auteur ; Bengt Hansson, Auteur ; Lilla Barabas, Auteur ; Istvan Bartol, Auteur ; Zsolt Karcza, AuteurIn Hungary an unusually high rate of parasitism on the great reed warbler Acrocephalus arundinaceus by the common cuckoo Cuculus canorus has been maintained for at least the last one hundred years. We evaluated parasitism rate, antiparasite defe[...]
Article
Jaroslav Kolecek, Auteur ; Petr Procházka, Auteur ; Naglaa El-Arabany, Auteur ; Maja Tarka, Auteur ; Mihaela Ilieva, Auteur ; Steffen Hahn, Auteur ; Marcel Honza, Auteur ; Javier de la Puente, Auteur ; Ana Bermejo, Auteur ; Arzu Gursoy, Auteur ; Staffan Bensch, Auteur ; Pavel Zehtindjiev, Auteur ; Dennis Hasselquist, Auteur ; Bengt Hansson, AuteurMigratory connectivity describes to which degree different breeding populations have distinct (non-overlapping) non-breeding sites. Uncovering the level of migratory connectivity is crucial for effective conservation actions and for understandin[...]
Article
Anders Brodin, Auteur ; Fredrik Haas, Auteur ; Bengt Hansson, AuteurIn hybrid zones populations that are otherwise allopatric meet and produce hybrids. One of the most well-known hybrid zones occurs throughout much of Europe between the hooded and carrion crows. Even though these species (or subspecies) of crows[...]
Article
Dennis Hasselquist, Auteur ; Teresa Montras-Janer, Auteur ; Maja Tarka, Auteur ; Bengt Hansson, AuteurThrough new tracking techniques, data on timing and routes of migration in long-distance migrant birds are accumulating. However, studies of the consistency of migration of the same individuals between years are still rare in small-sized passeri[...]
Article
Philip D. Round, Auteur ; Bengt Hansson, Auteur ; David J. Pearson, Auteur ; Peter R. Kennerley, Auteur ; Staffan Bensch, AuteurWe present compelling evidence of the continued existence of the large-billed reed warbler Acrocephalus orinus, hitherto known only from the unique type specimen collected in NW India 139 years ago. Morphological and genetic analyses of an unusu[...]
Article
Elizabeth Yohannes, Auteur ; Raymond W. Lee, Auteur ; Marc C. Jochimsen, Auteur ; Bengt Hansson, AuteurAnalyses of the stable isotope composition of feathers can provide significant insight into the spatial structure of bird migration. We collected feathers from Great Reed Warblers Acrocephalus arundinaceus, Clamorous Reed Warblers A. stentoreus [...]
