Legende
| HPa | Horstpaare allgemein |
| HPm | Horstpaare mit ausgeflogenen Jungen |
| HPo | Horstpaare ohne ausgeflogene Jungen |
| Hpx | Horstpaare ohne genaue Informationen |
| Jgz | Jungenzahl |
Brutpaarbestand und Brutergebnisse 2021 in der Schweiz Region Blau
| Region Blau | HPa | HPm | HPo | HPx | Jgz |
|---|---|---|---|---|---|
| Altstätten SG | 19 | 17 | 2 | 40 | |
| Balgach SG | 7 | 5 | 2 | 10 | |
| Buhwil TG | 1 | 1 | |||
| Bürglen TG | 2 | 2 | 3 | ||
| Egnach TG | 2 | 2 | 5 | ||
| Frauenfeld TG | 1 | 1 | |||
| Grabs SG | 1 | 1 | 2 | ||
| Güttingen TG | 2 | 2 | 7 | ||
| Kesswil TG | 1 | 1 | 3 | ||
| Kradolf-Schönenberg TG | 1 | 1 | 2 | ||
| Marbach SG | 1 | 1 | 2 | ||
| Müllheim TG | 1 | 1 | 4 | ||
| Oberriet SG | 12 | 9 | 3 | 18 | |
| Pfyn TG | 1 | 1 | 4 | ||
| Ramsen SH | 1 | 1 | |||
| Salez SG | 2 | 1 | 1 | 3 | |
| Salmsach TG | 1 | 1 | |||
| Sennwald Saxerriet SG | 31 | 26 | 5 | 68 | |
| SulgenTG | 1 | 1 | 2 | ||
| St. Margrethen SG | 1 | 1 | 1 | ||
| Thal SG | 1 | 1 | 2 | ||
| Uttwil TG | 1 | 1 | 2 | ||
| Wängi TG | 1 | 1 | 1 | ||
| Wigoltingen TG | 3 | 1 | 2 | 2 | |
| Total Region blau | 95 | 76 | 19 | 181 |