Breeding bird index

• Breeding population development, relative to the year 2000 (shaded: standard error)
• 174 regular breeders

Knaus P., T. Sattler, H. Schmid, N. Strebel & B. Volet (2021): The State of Birds in Switzerland 2021 online. http://www.vogelwarte.ch/state. Swiss Ornithological Institute, Sempach.