| Titre : | Ornis Fennica 97(4) - December, 2020 |
| Type de document : | Bulletin |
| Paru le : | 01/12/2020 |
Dépouillements
Article
Sebastian von Numers, Auteur ;
Markus Ost, Auteur ;
Mikael von Numers, Auteur
Many waders are declining based on winter surveys, but assumed trends need to be validated against changes in breeding numbers. Comparing breeding population changes between threatened and non-threatened closely related species allows assessment[...]
Article
Ülo Väli, Auteur ;
Piia Katharina Vaan, Auteur
Effective bioindicators of old-growth forest are important for conservation. The Greenish Warbler (Phylloscopus trochiloides viridanus), a forest-dwelling passerine, has been recorded in old-growth forests; however, its precise habitat preferenc[...]
Article
Vojtech Kubelka, Auteur
Predation is often the most important driver of breeding productivity and population dynamics in birds, with an increasing impact in the currently rapidly changing world. Despite decades of intensive research, our understanding of trophic intera[...]
Article
Marta Witkowska, Auteur ;
Wlodzimierz Meissner, Auteur
The Curlew Sandpiper (Calidris ferruginea) displays sexual dimorphism in size and in breeding plumage. We analysed biometric and plumage characteristics in adult Curlew Sandpipers and proposed a protocol for sexing individuals, with the use of t[...]
