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Frédéric Jiguet ; Pierrick Bocher ; Helmut Kruckenberg ; Steffen Kämpfer ; Etienne Debenest ; Romain Lorrilliere ; Pierre Rousseau ; Maciej Szajda ; Heinz DüttmannCapsule Migration associations by Eurasian Curlews Numenius arquata are temporary and last for single flight bouts between stopover sites.Aims Migrant shorebirds are known to initiate migration communally, with groups of birds departing simultan[...]
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Helmut Kruckenberg, Auteur
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Michal Polakowski, Auteur ; Lukasz Jankowiak, Auteur ; Krzysztof Stepniewski, Auteur ; Katarzyna Stepniewska, Auteur ; Helmut Kruckenberg, Auteur ; Barwolt S. Ebbinge, Auteur ; Monika Broniszewska, Auteur ; Anna Cichocka, Auteur
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Alexander Kondratyev, Auteur ; Elmira Zaynagutdinova, Auteur ; Helmut Kruckenberg, AuteurDans Wildfowl (63 2013)Barnacle Geese Branta leucopsis first colonised the Russian arctic island of Kolguev in the early 1980s, since when their numbers have steadily grown. Initial colonies were founded on fox-free coastal sand spits, but by the mid-1990s large colon[...]
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Volker Bluem, Auteur ; Axel Degen, Auteur ; Helmut Kruckenberg, AuteurThe migration of Mute Swans has not been studied extensively in Northwestern Germany before, in contrast to neighbouring countries. We describe movements of Mute Swans in the first autumn of their lifes as well as their distribution while wing-m[...]
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Christine Kowallik, Auteur ; Helmut Kruckenberg, Auteur ; Kees Koffijberg, Auteur ; Andrea Koelzsch, Auteur ; Johannes Borbach-Jaene, AuteurThe coastal marshes around the River Ems and the Dollard Bay in NW Germany are a core stopover site for migratory and wintering European Golden Plovers. Numbers, spatial distribution, phenology and habitat selection were studied in a 415 km(2) a[...]
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Helmut Kruckenberg, AuteurWe investigated the period of time colour-marked juveniles spent with the parental European White-fronted Geese. The families stayed together as units, sometimes Lip to the 2(nd) or 3(rd) winter. First familiy bonds started separating from each [...]
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Johannes Borbach-Jaene, Auteur ; Helmut Kruckenberg, AuteurWild geese staging at traditional sites use wide areas for feeding. White-fronted Geese were counted and mapped every second day from 1st October to 15th April in winters 1996/97 and 1997/98 in the Rheiderland area, NW Germany. By displaying the[...]
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Hans-Heiner Bergmann, Auteur ; Johannes Borbach-Jaene, Auteur ; Axel Degen, Auteur ; Helmut Kruckenberg, Auteur ; Johan H. Mooij, Auteur ; Martin Stock, Auteur ; Volkhard Wille, AuteurSeveral species of wild geese staging in central and western Europe during winter have recently increased or are still increasing in population size, or have reached carrying capacity. Among them, a small number of neozoans are presently not reg[...]
