Select until 1 January
Totals Polder Krûsbrekken 2017 - 2026
| Species | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 | Totals | Average | Newly ringed | Retraps | Year Maximum | |||||
| 1. | Barnacle Goose | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0.1 | 1 | 0 | 1 (2020) | ||||
| 2. | Shelduck | 0 | 0 | 0 | 0 | 0 | 3 | 1 | 2 | 0 | 0 | 6 | 0.7 | 6 | 0 | 3 (2022) | ||||
| 3. | Gadwall | 0 | 0 | 3 | 9 | 8 | 4 | 2 | 0 | 1 | 0 | 27 | 3 | 27 | 0 | 9 (2020) | ||||
| 4. | Pintail | 0 | 0 | 0 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 2 | 0.2 | 2 | 0 | 2 (2021) | ||||
| 5. | Teal | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 2 | 0.2 | 2 | 0 | 1 (2023) | ||||
| 6. | Quail | 0 | 0 | 0 | 0 | 0 | 1 | 5 | 0 | 0 | 0 | 6 | 0.7 | 6 | 0 | 5 (2023) | ||||
| 7. | Cuckoo | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 1 | 0.1 | 1 | 0 | 1 (2023) | ||||
| 8. | Water Rail | 0 | 0 | 0 | 6 | 0 | 15 | 4 | 0 | 0 | 0 | 25 | 2.8 | 25 | 0 | 15 (2022) | ||||
| 9. | Spotted Crake | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 1 | 0.1 | 1 | 0 | 1 (2023) | ||||
| 10. | Moorhen | 0 | 0 | 0 | 1 | 0 | 1 | 1 | 0 | 0 | 0 | 3 | 0.3 | 3 | 0 | 1 (2020) | ||||
| 11. | Oystercatcher | 7 | 0 | 1 | 3 | 7 | 6 | 2 | 3 | 2 | 0 | 31 | 3.4 | 31 | 0 | 7 (2017) | ||||
| 12. | Avocet | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 1 | 2 | 0 | 4 | 0.4 | 3 | 1 | 2 (2025) | ||||
| 13. | Golden Plover | 28 | 38 | 47 | 7 | 17 | 36 | 6 | 10 | 5 | 0 | 194 | 22 | 193 | 1 | 47 (2019) | ||||
| 14. | Lapwing | 18 | 3 | 19 | 32 | 4 | 17 | 13 | 21 | 6 | 0 | 133 | 15 | 133 | 0 | 32 (2020) | ||||
| 15. | Whimbrel | 5 | 1 | 0 | 2 | 5 | 4 | 5 | 20 | 4 | 0 | 46 | 5.1 | 45 | 1 | 20 (2024) | ||||
| 16. | Curlew | 1 | 3 | 1 | 3 | 1 | 1 | 2 | 1 | 2 | 0 | 15 | 1.7 | 15 | 0 | 3 (2018) | ||||
| 17. | Bar-tailed Godwit | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 0.1 | 1 | 0 | 1 (2024) | ||||
| 18. | Black-tailed Godwit | 9 | 7 | 14 | 6 | 35 | 39 | 7 | 12 | 6 | 0 | 135 | 15 | 131 | 4 | 39 (2022) | ||||
| 19. | Icelandic Black-tailed Godwit | 0 | 0 | 1 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 2 | 0.2 | 2 | 0 | 1 (2019) | ||||
| 20. | Woodcock | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 0.1 | 1 | 0 | 1 (2022) | ||||
| 21. | Snipe | 0 | 1 | 10 | 13 | 3 | 15 | 3 | 2 | 0 | 0 | 47 | 5.2 | 47 | 0 | 15 (2022) | ||||
| 22. | Green Sandpiper | 0 | 0 | 1 | 1 | 0 | 0 | 1 | 0 | 1 | 0 | 4 | 0.4 | 4 | 0 | 1 (2019) | ||||
| 23. | Wood Sandpiper | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0.1 | 1 | 0 | 1 (2020) | ||||
| 24. | Redshank | 13 | 3 | 12 | 4 | 4 | 5 | 4 | 4 | 7 | 0 | 56 | 6.2 | 56 | 0 | 13 (2017) | ||||
| 25. | Spotted Redshank | 1 | 0 | 1 | 1 | 1 | 0 | 1 | 2 | 1 | 0 | 8 | 0.9 | 8 | 0 | 2 (2024) | ||||
| 26. | Greenshank | 2 | 1 | 5 | 15 | 0 | 0 | 4 | 1 | 3 | 0 | 31 | 3.4 | 31 | 0 | 15 (2020) | ||||
| 27. | Turnstone | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 1 | 0.1 | 1 | 0 | 1 (2023) | ||||
| 28. | Ruff | 68 | 3 | 41 | 60 | 44 | 52 | 63 | 58 | 28 | 0 | 417 | 46 | 410 | 7 | 68 (2017) | ||||
| 29. | Dunlin | 3 | 2 | 0 | 1 | 0 | 0 | 1 | 10 | 1 | 0 | 18 | 2 | 18 | 0 | 10 (2024) | ||||
| 30. | Common Tern | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0.1 | 1 | 0 | 1 (2025) | ||||
| 31. | Black-headed Gull | 0 | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 2 | 0.2 | 2 | 0 | 1 (2018) | ||||
| 32. | Common Gull | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 0.1 | 1 | 0 | 1 (2021) | ||||
| 33. | Goshawk | 0 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 0.2 | 2 | 0 | 2 (2019) | ||||
| 34. | Barn Owl | 0 | 0 | 0 | 0 | 0 | 9 | 9 | 0 | 7 | 0 | 25 | 2.8 | 20 | 5 | 9 (2022) | ||||
| 35. | Long-eared Owl | 0 | 0 | 0 | 0 | 0 | 5 | 8 | 0 | 3 | 0 | 16 | 1.8 | 16 | 0 | 8 (2023) | ||||
| 36. | Short-eared Owl | 0 | 0 | 0 | 0 | 0 | 2 | 6 | 0 | 3 | 0 | 11 | 1.2 | 11 | 0 | 6 (2023) | ||||
| 37. | Kestrel | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 1 | 0.1 | 1 | 0 | 1 (2023) | ||||
| 38. | Peregrine | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0.1 | 0 | 1 | 1 (2019) | ||||
| 39. | Rook | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0.1 | 1 | 0 | 1 (2019) | ||||
| 40. | Skylark | 0 | 0 | 0 | 0 | 0 | 6 | 0 | 0 | 0 | 0 | 6 | 0.7 | 6 | 0 | 6 (2022) | ||||
| 41. | Swallow | 0 | 0 | 0 | 0 | 0 | 97 | 9 | 0 | 0 | 0 | 106 | 12 | 106 | 0 | 97 (2022) | ||||
| 42. | Cetti's Warbler | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 0.1 | 1 | 0 | 1 (2022) | ||||
| 43. | Aquatic Warbler | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 0.1 | 1 | 0 | 1 (2022) | ||||
| 44. | Sedge Warbler | 0 | 0 | 0 | 0 | 0 | 7 | 1 | 0 | 0 | 0 | 8 | 0.9 | 8 | 0 | 7 (2022) | ||||
| 45. | Reed Warbler | 0 | 0 | 0 | 0 | 0 | 5 | 4 | 0 | 0 | 0 | 9 | 1 | 9 | 0 | 5 (2022) | ||||
| 46. | Savi's Warbler | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 0.1 | 1 | 0 | 1 (2022) | ||||
| 47. | Whitethroat | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 1 | 0.1 | 1 | 0 | 1 (2023) | ||||
| 48. | Wren | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 0.1 | 1 | 0 | 1 (2022) | ||||
| 49. | Starling | 0 | 0 | 0 | 0 | 0 | 3 | 0 | 0 | 0 | 0 | 3 | 0.3 | 3 | 0 | 3 (2022) | ||||
| 50. | Fieldfare | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0.1 | 1 | 0 | 1 (2020) | ||||
| Species | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 | Totals | Average | Newly ringed | Retraps | Year Maximum | |||||
| Totals | 155 | 63 | 160 | 168 | 133 | 338 | 169 | 148 | 84 | 0 | 1418 | 158 | 1398 | 20 | ||||||
| Observation hours | 69:00 | 63:30 | 117:49 | 142:13 | 115:07 | 195:01 | 179:30 | 89:00 | 87:15 | 1,058:25 | 117:36 | |||||||||
