| Titre : | Ornis Fennica 94(2) - 2017 |
| Type de document : | Bulletin |
| Paru le : | 01/06/2017 |
Dépouillements
Article
Vidar Selås, Auteur
In Scandinavia, the Eurasian Jay (Garrulus glandarius) is a resident forest-dwelling species, which in some years show eruptive movements in the autumn. Such irruptions seem to be related to the variation in seed crops of oaks (Quercus spp.). Wh[...]
Article
Pauliina H. Jarvinen, Auteur ;
Edward Kluen, Auteur ;
Maiju Tiiri, Auteur ;
Jon E. Brommer, Auteur
Birds show immense variation in nest sizes within species. At least six different hypotheses have been forwarded to explain intraspecific variation in nest size in cavity nesting species. hut very few of those hypotheses have been tested experim[...]
Article
Stanislaw Tworek, Auteur ;
Artur Golawski, Auteur ;
Marek Jobda, Auteur ;
Jakub Z. Kosicki, Auteur
The implementation of agri-environment schemes (AES) in Poland began in 2004, yet the effects of their implementation were not systematically monitored until 2010. Using monitoring data collected in 2011 from two regions of Poland, the foothills[...]
Article
Irina Marova, Auteur ;
Daria Shipilina, Auteur ;
Vjatcheslav Fedorov, Auteur ;
Valery Alekseev, Auteur ;
Vladimir Lvanitskii, Auteur
The study of hybridization between closely related taxa of animals sheds light on many important issues of evolution biology and taxonomy. Common Chiffchaff (Phylloscopus collybita abietinus) and Siberian Chiffchaff (Ph. c. tristis) co-occur in [...]
Article
Aleksi Lehikoinen, Auteur ;
Jarkko Santaharju, Auteur ;
Anders Pape Moller, Auteur
Multiple studies have investigated differential migration of sexes during spring migration, while such differences during autumn migration are poorly studied. We tested several functional hypotheses explaining differences in autumnmigration date[...]
