| Titre : | Vogelwelt (Die) 119(1) - 1998 |
| Type de document : | Bulletin |
| Paru le : | 00/00/0000 |
Dépouillements
Article
Helmut Laussmann, Auteur ;
Harald Plachter, Auteur
A study farm of about 150 hectares north-west of Munich (Bavaria) was managed by an interdisciplinary research project starting in 1991. After two years of conventional farming, the area was split into two parts. Since then, one half of the area[...]
Article
Wolfgang Scherzinger, Auteur
Density and population trends of specialized woodpeckers are expected to reflect current habitat quality of forests and woodlands, e.g. amount of old growth, dead wood, tree species diversity and structural diversity. I investigated whether this[...]
Article
Ragnar Kinzelbach, Auteur
An attempt is made to understand the reasons for the current expansion of the Redpoll by comparing the earliest historical records, here those on winter invasions in Central Europe. Their number increased from the middle of the 16th century onwa[...]
Article
Jelena Kralj, Auteur ;
Dragan Radovic, Auteur ;
Vesna Tutis, Auteur
We studied all species of Anatidae at Draganic fishponds (NW Croatia) from August 1991 to January 1995 during the breeding, wintering and migration periods. Twenty species were noted, of which 13 occurred regularly, the other 7 were irregular or[...]
