| Titre : | Ornis Fennica 84(3) - 2007 |
| Type de document : | Bulletin |
| Paru le : | 00/00/0000 |
Dépouillements
Article
Radoslaw Wlodarczyk, Auteur ;
Plotr Minias, Auteur ;
Krzysztof Kaumarek, Auteur ;
Tomasz Janiszewski, Auteur ;
Anna Kleszcz, Auteur
Waders generally follow two alternative strategies. The "B-strategy" or "energy minimization" strategy is to initiate migration late in the season, start moulting at the breeding grounds and migrate slowly in small steps, whereas the "S-strategy[...]
Article
Matti Halonen, Auteur ;
Tapio Mappes, Auteur ;
Taru Meri, Auteur ;
Jukka Suhonen, Auteur
Voles are the most preferred prey of Pygmy Owls (Glaucidium passerinum) in Northern Europe, where the extensive snow cover may decrease the availability of voles. Snow cover may thus cause changes in the diet from what is expected on the basis o[...]
Article
Vidar Selås, Auteur ;
Reidar Tveiten, Auteur ;
Ole Martin Aanonsen, Auteur
We examined the diet of six breeding Common Buzzard (Buteo buteo) pairs in southern Norway, by analysing pellets and prey remains collected around and in nests, and by video recording prey delivery at the nests. Mammals, birds and reptiles were [...]
Article
Yoko Muraoka, Auteur ;
Gábor Wichmann, Auteur
We used sightings and recaptures of colour-marked Wood Sandpipers to examine the trap response of this locally abundant migrant in north-east Austria. Birds were caught in selected wastewater pools of the local sugar factory using walk-in traps.[...]
Article
Terje Laskemoen, Auteur ;
Oddmund Kleven, Auteur ;
Frode Fossoy, Auteur ;
Jan T. Lifjeld, Auteur
Sperm cells are highly diversified in birds and considerable research effort has focused on variation in sperm morphology between species. However, surprisingly little is known about intraspecific variation in sperm morphology in birds. We analy[...]
Article
Trond V. Johnsen, Auteur ;
Geir H. Systad, Auteur ;
Karl O. Jacobsen, Auteur ;
Torgeir Nygard, Auteur ;
Jan O. Bustnes, Auteur
To assess the importance of semi-domesticated reindeer Rangifer tarandus calves in the diet of Golden Eagles Aquila chrysaetos, in Finnmark (northern Norway), we collected prey remains at 37 nests over six years (2001-2006). The study area was d[...]
