Breeding bird index

• Relative evolution of the breeding population (100 = mean value; shaded: standard error)
• 176 regular breeders
• Download values as spreadsheet

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.