Détail de l'auteur
Documents disponibles écrits par cet auteur (7)
Ajouter le résultat dans votre panier Affiner la recherche
Article
Simone Verbarg, Auteur ; Hans-Heiner Bergmann, Auteur ; Wiltraud Englaender, AuteurWhite fringes of 6th, 10th and 12th secondary flight feathers of shelducks were scanned and their proportions of the vane areas measured using ArcView GIS software. First year birds had broad conspicuous fringes on both all secondaries and prima[...]
Rapport
Hans-Heiner Bergmann, Auteur ; Heinz Gundlach, Auteur ; Martin Wessel, Auteur ; Ernst Gerstner, Auteur ; Kurt Kellner, Auteur 1963
Article
Volkhard Wille, Auteur ; Hans-Heiner Bergmann, AuteurThe Lower Rhine area is a major winter staging area of wild geese in northern Germany and the Netherlands. During the four winters of this study (November 1994 through March 1999), Geese were hunted only in the Netherlands, not in the adjoining [...]
Article
Siegfried Klaus, Auteur ; Hans-Heiner Bergmann, AuteurThe Hazel Grouse is mainly threatened by habitat loss as result of inadequate forest management (large clear-cuts, coniferous monocultures, ceasing of coppice forest use) and habitat fragmentation. The current distribution (map Fig. 1, c. 2000-4[...]
Article
Article
Eberhard Mey, Auteur ; Robert Pfeifer, Auteur ; Hans-Heiner Bergmann, Auteur ; Sabine Hackethal, AuteurA water colour painting from the 'Gothaer Vogelbuch' [The bird book of Gotha] of a Pine Grosbeak pair from some time between 1603 and 1662, or even earlier, is dealt with here. The birds were captured on a fowling ground near Ossla (Wurzbach) in[...]
Article
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[...]
