| Titre : | Vogelwarte 39(4) - Dec., 1998 |
| Type de document : | Bulletin |
| Paru le : | 00/00/0000 |
Dépouillements
Article
Hans-Joachim Deppe, Auteur
Results of further investigations (DEPPE 1974) could be completed, because the number of observed eagles was increasing from 485 up to the number of 814 individuals. The structure of the fequency distributions for different periods are demonstra[...]
Article
Jesus M. Aviles, Auteur ;
Juan M. Sanchez, Auteur ;
Francisco J. Medina, Auteur
The responses of wintering cranes from southwestern Spain (Serena region) to potential predators were studied. Three different behavior patterns were observed when the predators appeared: flight, forming of dense groups on the ground as well as [...]
Article
Josef Kreuziger, Auteur ;
Ernst-Ludwig Achenbach, Auteur
In the special protected area "Kuehkopf-Knoblochsaue" (Hesse) we observed a Grey Heron (Ardea cinerea) swallowing a juvenile Great Crested Grebe (Podiceps cristatus), probably being dead already before. Based on the literature it is one of the l[...]
Article
Ute Rahne, Auteur ;
Wolfgang Winkel, Auteur
From 1945 until 1997 more than 212,000 Pied Flycatchers Ficedula hypoleuca (breeding birds and nestlings) were ringed in study areas near Brunswick in northern Germany. Up to a very recent period no recoveries from this population are existing o[...]
Article
Edith Sonnenschein, Auteur
A dead golden oriole was found on Kilimanjaro (Tanzania) at an altitude of 4.300 m.
Article
Milan Vogrin, Auteur
Breeding ecology of a rural Magpie Pica pica population was studied in northeastern Slovenia during 1989-1991 and 1997. The estimated breeding density was 0.5 breeding pairs/10 ha on 346 ha of research area. Magpie nests were found in at least 1[...]
Article
Lorenzo Serra, Auteur ;
Renzo Rusticali, Auteur
Grey Plovers (Pluvialis squatarola) wintering in northeastern Italy were morphometrically closer to the populations which use the East Atlantic Flyway than those following eastern routes, but differences in biometrics appeared too small for reli[...]
Article
Jesus M. Aviles, Auteur ;
Emilio Costillo, Auteur
The selection of breeding habitats by Rollers (Coracias garrulus) is analysed in the southwestern Iberian Peninsula. Rollers selected positively areas where two years set-aside occurs ("posios") with holm-oak trees, though this substrate was sca[...]
Article
Johan H. Mooij, Auteur
The effect of different intensities of winter and early spring grazing by both White-fronted and Bean geese, Anser albifrons and A.fabalis, on the yields of agricultural grasslands (first grass cut) and autumn-sown wheat and barley (grain yield)[...]
Article
Grzegorz Kopij, Auteur
The Southern Bald Ibis behavioural patterns and their daily and seasonal frequency of performance were analysed in a breeding colony in the eastern Free State, South Africa. This species behaviour is characterised by varied and often performed b[...]
Article
Wolfgang Fiedler, Auteur
In the 1960ies, the Redstart and the Wryneck showed massive population decreases in Central Europe. Under several restrictions the decline is clearly evident in the annual totals of birds ringed at the Vogelwarte Radolfzell. With respect to the [...]
