| Titre : | Ornis Fennica 92(1) - 2015 |
| Type de document : | Bulletin |
| Paru le : | 00/00/0000 |
Dépouillements
Article
Robert Gwiazda, Auteur ;
Mateusz Ledwon, Auteur
Sexual size dimorphism is common in many bird species. It can lead to sex-specific differences in foraging ability. The Whiskered Tern (Chlidonias hybrida) exhibits sexual size dimorphism. Sex-specific differences in the foraging behaviour of Wh[...]
Article
Robert Moss, Auteur ;
Vladimir Borchtchevski, Auteur
Capercaillie (Tetrao urogallus) males in the remnant unlogged forest of
Article
Michal Gladalski, Auteur ;
Miroslawa Banbura, Auteur ;
Adam Kaliński, Auteur ;
Marcin Markowski, Auteur ;
Joanna Skwarska, Auteur ;
Jaroslaw Wawrzyniak, Auteur ;
Piotr Zieliński, Auteur ;
Iwona Cyzewska, Auteur ;
Jerzy Bańbura, Auteur
Studies at various locations in Europe show that nest-box populations of tits in urban areas lay earlier and produce fewer eggs than do birds in rural areas. Long-term data on laying date and clutch size were studied for Blue Tit (Cyanistes caer[...]
Article
Per Gustav Thingstad, Auteur ;
Olav Hogstad, Auteur ;
James D. M. Speed, Auteur
Many European-breeding bird species wintering south of the Sahel region in Africa have been reported to be in decline since the 1970s. However, most studies focus on conditions local to the breeding sites as determinants of population change, de[...]
Article
Daiva Vaitkuviene, Auteur ;
Mindaugas Dagys, Auteur ;
Galina Bartkeviciene, Auteur ;
Danuta Romanovskaja, Auteur
The influence of weather variables on bird migration is widely recognised as birds have been found to adjust their migration phenology under the influence of weather conditions. This is of particular interest in relation to global climate change[...]
