| Titre : | Journal of Ornithology 146(3) - JUL 2005 |
| Type de document : | Bulletin |
| Paru le : | 00/00/0000 |
Dépouillements
Article
J. A. Amat, Auteur
A small percentage (4.5%) of females Kentish plovers (Charadrius alexandrinus) observed breeding in southern Spain expressed a plumage trait characteristic of males: the forecrown (frontal) black bar. The expression of this male trait may be age[...]
Article
J. Aschwanden, Auteur ;
S. Birrer, Auteur ;
L. Jenni, Auteur
Common kestrels (Falco tinnunculus) and long-eared owls (Asio otus) in intensively farmed areas in Switzerland decreased markedly as a result of declining vole (Microtus spp.) populations. In order to counteract the loss of biodiversity in inten[...]
Article
C. M. Hewson, Auteur ;
R. J. Fuller, Auteur ;
C. Day, Auteur
The nightingale Luscinia megarhynchos has undergone population decline and range contraction at the north-western limit of its distribution in England during the last 25 years. We examine patterns of habitat occupancy and habitat availability ac[...]
Article
J. Gonzalez-Solis, Auteur ;
P. H. Becker, Auteur ;
H. Wendeln, Auteur ;
M. Wink, Auteur
Bias in sex ratios at hatching and sex specific post hatching mortality in size dimorphic species has been frequently detected, and is usually skewed towards the production and survival of the smaller sex. Since common terns Sterna hirundo show [...]
Article
Approximately 200-250 pairs of kestrels (Falco tinnunculus) breed in Berlin, preferentially in nest boxes. From 2002 to 2004, ten monitoring sites (breeding sites) characterised by different housing structure, land utilisation, vegetation cover [...]
Article
Z. Kosinski, Auteur ;
A. Winiecki, Auteur
The main goals of this study were to investigate the relationships between densities of the breeding population of the middle spotted woodpecker Dendrocopos medius obtained on 19 large-scale plots, and the share of different habitats and age of [...]
Article
B. Lauga, Auteur ;
C. Cagnon, Auteur ;
F. D'Amico, Auteur ;
S. Karama, Auteur ;
C. Mouches, Auteur
Cytochrome b gene sequence variation (902 bp) was used to investigate phylogenetic relationships and genetic differentiation among the four subspecies of European white-throated dipper Cinclus cinclus (Aves; Cinclidae). Six cytochrome b haplotyp[...]
Article
J. T. Lifjeld, Auteur ;
A. Johnsen, Auteur ;
T. Petitguyot, Auteur
We examined inter- and intra-clutch egg-size variation in the bluethroat (Luscinia s. svecica), an open-nesting passerine breeding in the sub-alpine region in southern Norway. By removing first clutches shortly after egg-laying, we induced layin[...]
Article
A. J. Helbig, Auteur ;
I. Seibold, Auteur ;
A. Kocum, Auteur ;
D. Liebers, Auteur ;
J. Irwin, Auteur ;
U. Bergmanis, Auteur ;
B. U. Meyburg, Auteur ;
W. Scheller, Auteur ;
M. Stubbe, Auteur ;
S. Bensch, Auteur
Greater and lesser spotted eagles (Aquila clanga, A. pomarina) are two closely related forest eagles overlapping in breeding range in east-central Europe. In recent years a number of mixed pairs have been observed, some of which fledged hybrid y[...]
Article
Article
B. Kloubec, Auteur ;
M. Capek, Auteur
Seasonal and diel patterns of singing activity of Savi's warblers (Locustella luscinioides) were studied in two areas of Central Europe 300 km apart, over a period of 18 years. We assess about 4,600 records of individuals singing. Males were fou[...]
Article
P. Tryjanowski, Auteur ;
S. Kuzniak, Auteur ;
T. H. Sparks, Auteur
We analysed which among four factors (mean first arrival date, migration distance, changes in population size, detectability of species) influenced the magnitude of change (regression coefficient) in the first arrival dates of 30 migrant bird sp[...]
Article
G. Sachs, Auteur
A new concept for describing the yaw stability in gliding birds is presented. This concept introduces dynamic stiffness in yaw as an appropriate indication of stability. Other than the conventional metric of static yaw stability given by the gra[...]
