| Titre : | Ornithologischer Anzeiger 42(2) - Mai 2003 |
| Type de document : | Bulletin |
| Paru le : | 00/00/0000 |
Dépouillements
Article
From the calcareous marshes near Chelm (SE Poland) 14 cases of Marsh Harriers robbing prey from Honey Buzzards are reported. Six times the victims lost Hymenoptera (Apoidea) nests to a Marsh Harrier. These kleptoparasitic attacks benefit from th[...]
Article
Ralf Strewe, Auteur
Biogeographic studies of the areal structure and areal dynamics of Thraupinae were conducted over two years within the Endemic Bird Area Choco on the Pacific slope of the Westandes in the department Narino, Colombia. Thraupinae were selected, as[...]
Article
Social and non-social hunting of juveniles of Montagu's Harrier Circits pygaigiis during a post-fledging period was observed in southeast Poland. Social hunting sessions were of imitative character since no form of cooperation between juveniles [...]
Article
Miriam M. Hansbauer, Auteur ;
Aurelia Munck, Auteur ;
Ilse Storch, Auteur
The Point Count is a relative method to record bird communities. It is a time and work saving alternative to more costly methods such as territory mapping, and is therefore often used for monitoring. The aim of this work was to examine the influ[...]
