Select until 10 November
Totals Berkum (Zwolle) 2016 - 2025
| | Species | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | Totals | Average | Newly
ringed | Retraps | Year
Maximum | |
| 1. | Collared Dove | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 1 | 0.2 | 1 | 0 | 1 (2022) | | | | |
| 2. | Great Spotted Woodpecker | 0 | 0 | 0 | 0 | 0 | 4 | 3 | 2 | 0 | 0 | 9 | 1.8 | 6 | 3 | 4 (2021) | | | | |
| 3. | Blue Tit | 0 | 0 | 0 | 0 | 0 | 45 | 94 | 43 | 27 | 82 | 291 | 58 | 225 | 66 | 94 (2022) | | | | |
| 4. | Great Tit | 0 | 0 | 0 | 0 | 0 | 49 | 34 | 14 | 5 | 78 | 180 | 36 | 146 | 34 | 78 (2025) | | | | |
| 5. | Chiffchaff | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 2 | 0.4 | 2 | 0 | 2 (2025) | | | | |
| 6. | Goldcrest | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0.2 | 1 | 0 | 1 (2025) | | | | |
| 7. | Starling | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 7 | 0 | 10 | 2 | 10 | 0 | 7 (2024) | | | | |
| 8. | Robin | 0 | 0 | 0 | 0 | 0 | 1 | 3 | 1 | 0 | 2 | 7 | 1.4 | 6 | 1 | 3 (2022) | | | | |
| 9. | House Sparrow | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 2 | 0.4 | 2 | 0 | 2 (2024) | | | | |
| 10. | Dunnock | 0 | 0 | 0 | 0 | 0 | 2 | 1 | 1 | 1 | 1 | 6 | 1.2 | 4 | 2 | 2 (2021) | | | | |
| | Species | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | Totals | Average | Newly
ringed | Retraps | Year
Maximum | |
| |
Totals |
0 | 0 | 0 | 0 | 0 | 101 | 136 | 64 | 42 | 166 | 509 | 102 | 403 | 106 | | |
| |
Observation hours |
| | | | | 85:00 | 74:00 | 37:00 | 16:00 | 60:30 | 272:30 | 54:30 | | | | |
