| Titre : | Ornis Fennica 75(1) - 1998 |
| Type de document : | Bulletin |
| Paru le : | 00/00/0000 |
Dépouillements
Article
S. Gillings, Auteur ;
R. J. Fuller, Auteur ;
A. C. B. Henderson, Auteur
Territory mapping and transect counts were made in upland birch scrub (46 ha) in north-east Scotland to document the bird community and assess responses of birds to habitat variation. The bird community was species poor, supporting approximately[...]
Article
M. Halonen, Auteur ;
M. Kuitunen, Auteur
Lack (1947) suggested that one factor affecting clutch size in birds is the latitude at which the clutch is laid. He proposed that this geographical variation is partly influenced by latitudinal differences in day length. We studied the effect o[...]
Article
I. Krams, Auteur
I studied changes in body mass in response to the presence of heterospecifics in mixed-species flocks of free-living Willow and Crested Tits. Body reserves of Willow Tits as subordinate flock members were found to be dependent on the presence of[...]
Article
K. Lahti, Auteur
Many birds spend the non-breeding season in flocks which exhibit a clear social hierarchy. This review outlines survival of passerine birds which live in such flocks. Survival is examined in relation to social dominance and to differences in beh[...]
