[Selection of foraging areas by Bramblings Fringilla montifringilla in mass roosts.]
Flight behaviour of nocturnal migrants above the Swiss Lowlands and the Alps compared.]
[Rare and unusual records of breeding bird species in Switzerland, 2021.]
[30 years of monitoring of Common Kingfisher Alcedo atthis and species-specific conservation measures at the Zurich stretch of the river Thur.]