Select until 5 March
Totals Wellerlooi (nacht) 2017 - 2026
| | Species | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 | Totals | Average | Present | Year Maximum | |
| 1. | Dark-bellied Brent Goose | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 0 | 0 | 3 | 0.8 | 0 | 3 (2024) | | | | |
| 2. | Canada Goose | 0 | 0 | 0 | 0 | 0 | 0 | 6 | 16 | 6 | 7 | 35 | 8.8 | 0 | 16 (2024) | | | | |
| 3. | Barnacle Goose | 0 | 0 | 0 | 0 | 0 | 0 | 50 | 105 | 212 | 42 | 409 | 102 | 0 | 212 (2025) | | | | |
| 4. | Greylag Goose | 0 | 0 | 0 | 0 | 0 | 0 | 20 | 106 | 129 | 20 | 275 | 69 | 1 | 129 (2025) | | | | |
| 5. | goose sp. | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 2 | 0 | 4 | 1 | 0 | 2 (2024) | | | | |
| 6. | Tundra Bean Goose | 0 | 0 | 0 | 0 | 0 | 0 | 48 | 447 | 242 | 54 | 791 | 198 | 0 | 447 (2024) | | | | |
| 7. | Eurasian White-fronted Goose | 0 | 0 | 0 | 0 | 0 | 0 | 517 | 1851 | 3522 | 2101 | 7991 | 1998 | 0 | 3522 (2025) | | | | |
| 8. | Bewick's Swan | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0.3 | 0 | 1 (2025) | | | | |
| 9. | Egyptian Goose | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0.3 | 0 | 1 (2026) | | | | |
| 10. | Ruddy Shelduck | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 2 | 5 | 9 | 2.3 | 0 | 5 (2026) | | | | |
| 11. | Shoveler | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 4 | 0 | 0 | 4 | 1 | 13 | 4 (2024) | | | | |
| 12. | Gadwall | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 68 | 112 | 14 | 194 | 49 | 0 | 112 (2025) | | | | |
| 13. | Wigeon | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 15 | 64 | 11 | 90 | 22.5 | 0 | 64 (2025) | | | | |
| 14. | Mallard | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 20 | 42 | 7 | 70 | 17.5 | 10 | 42 (2025) | | | | |
| 15. | Pintail | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 5 | 0 | 5 | 1.3 | 0 | 5 (2025) | | | | |
| 16. | Teal | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 17 | 18 | 6 | 41 | 10.3 | 0 | 18 (2025) | | | | |
| 17. | duck sp. | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 4 | 0 | 5 | 1.3 | 0 | 4 (2025) | | | | |
| 18. | Goldeneye | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0.3 | 0 | 1 (2025) | | | | |
| 19. | Quail | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 11 | 23 | 0 | 34 | 8.5 | 6 | 23 (2025) | | | | |
| 20. | Nightjar | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 7 | 0 | 10 | 2.5 | 0 | 7 (2025) | | | | |
| 21. | Swift | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0.3 | 0 | 1 (2025) | | | | |
| 22. | Cuckoo | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 1 | 0 | 3 | 0.8 | 0 | 2 (2024) | | | | |
| 23. | Woodpigeon | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 0 | 3 | 0.8 | 0 | 3 (2025) | | | | |
| 24. | Water Rail | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 111 | 94 | 2 | 209 | 52 | 0 | 111 (2024) | | | | |
| 25. | Spotted Crake | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 4 | 0 | 0 | 4 | 1 | 0 | 4 (2024) | | | | |
| 26. | Moorhen | 0 | 0 | 0 | 0 | 0 | 0 | 6 | 169 | 228 | 20 | 423 | 106 | 1 | 228 (2025) | | | | |
| 27. | Coot | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 105 | 74 | 15 | 197 | 49 | 0 | 105 (2024) | | | | |
| 28. | Crane | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 2 | 0.5 | 0 | 2 (2026) | | | | |
| 29. | Little Grebe | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 12 | 14 | 3 | 30 | 7.5 | 0 | 14 (2025) | | | | |
| 30. | Oystercatcher | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 31 | 24 | 4 | 61 | 15.3 | 0 | 31 (2024) | | | | |
| 31. | Avocet | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 9 | 5 | 0 | 14 | 3.5 | 0 | 9 (2024) | | | | |
| 32. | Grey Plover | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 2 | 0.5 | 0 | 1 (2023) | | | | |
| 33. | Golden Plover | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 2 | 5 | 3 | 11 | 2.8 | 0 | 5 (2025) | | | | |
| 34. | Ringed Plover | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 0.3 | 0 | 1 (2024) | | | | |
| 35. | Little Ringed Plover | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 16 | 12 | 0 | 30 | 7.5 | 0 | 16 (2024) | | | | |
| 36. | Lapwing | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 3 | 10 | 1 | 17 | 4.3 | 0 | 10 (2025) | | | | |
| 37. | Whimbrel | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 6 | 13 | 0 | 20 | 5 | 0 | 13 (2025) | | | | |
| 38. | Curlew | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 16 | 17 | 2 | 37 | 9.3 | 0 | 17 (2025) | | | | |
| 39. | Snipe | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 1 | 1 | 0 | 5 | 1.3 | 0 | 3 (2023) | | | | |
| 40. | Common Sandpiper | 0 | 0 | 0 | 0 | 0 | 0 | 16 | 21 | 41 | 0 | 78 | 19.5 | 0 | 41 (2025) | | | | |
| 41. | Green Sandpiper | 0 | 0 | 0 | 0 | 0 | 0 | 8 | 5 | 5 | 0 | 18 | 4.5 | 0 | 8 (2023) | | | | |
| 42. | Wood Sandpiper | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 2 | 0 | 3 | 0.8 | 0 | 2 (2025) | | | | |
| 43. | Redshank | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 8 | 0 | 9 | 2.3 | 0 | 8 (2025) | | | | |
| 44. | Greenshank | 0 | 0 | 0 | 0 | 0 | 0 | 5 | 1 | 7 | 0 | 13 | 3.3 | 0 | 7 (2025) | | | | |
| 45. | Dunlin | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 2 | 0.5 | 0 | 1 (2023) | | | | |
| 46. | Caspian Tern | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | 2 | 0.5 | 0 | 2 (2024) | | | | |
| 47. | Common Tern | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0.3 | 0 | 1 (2025) | | | | |
| 48. | Black-headed Gull | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 17 | 20 | 7 | 45 | 11.3 | 0 | 20 (2025) | | | | |
| 49. | Common Gull | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 2 | 0.5 | 0 | 1 (2025) | | | | |
| 50. | large gull sp. | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 6 | 0 | 6 | 1.5 | 0 | 6 (2025) | | | | |
| | Species | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 | Totals | Average | Present | Year Maximum | |
| 51. | Bittern | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 7 | 9 | 5 | 24 | 6 | 0 | 9 (2025) | | | | |
| 52. | Night Heron | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 4 | 2 | 0 | 6 | 1.5 | 0 | 4 (2024) | | | | |
| 53. | heron sp. | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 0.3 | 0 | 1 (2024) | | | | |
| 54. | Grey Heron | 0 | 0 | 0 | 0 | 0 | 0 | 70 | 162 | 177 | 17 | 426 | 107 | 0 | 177 (2025) | | | | |
| 55. | Purple Heron | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 1 | 0.3 | 0 | 1 (2023) | | | | |
| 56. | Little Owl | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 1 | 0.3 | 0 | 1 (2023) | | | | |
| 57. | Long-eared Owl | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 2 | 0 | 4 | 1 | 10 | 2 (2025) | | | | |
| 58. | Magpie | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0.3 | 0 | 1 (2025) | | | | |
| 59. | Carrion Crow | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 2 | 0 | 0 | 4 | 1 | 0 | 2 (2023) | | | | |
| 60. | Wood Lark | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 0.3 | 0 | 1 (2024) | | | | |
| 61. | Skylark | 0 | 0 | 0 | 0 | 0 | 0 | 8 | 31 | 6 | 3 | 48 | 12 | 0 | 31 (2024) | | | | |
| 62. | Chiffchaff | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0.3 | 0 | 1 (2025) | | | | |
| 63. | Blackcap | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 2 | 0 | 3 | 0.8 | 0 | 2 (2025) | | | | |
| 64. | Goldcrest | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 4 | 2 | 0 | 6 | 1.5 | 0 | 4 (2024) | | | | |
| 65. | Starling | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 2 | 0 | 4 | 1 | 0 | 2 (2024) | | | | |
| 66. | Song Thrush | 0 | 0 | 0 | 0 | 0 | 0 | 2650 | 6959 | 5980 | 312 | 15901 | 3975 | 0 | 6959 (2024) | | | | |
| 67. | Redwing | 0 | 0 | 0 | 0 | 0 | 0 | 1964 | 7158 | 7542 | 121 | 16785 | 4196 | 0 | 7542 (2025) | | | | |
| 68. | Blackbird | 0 | 0 | 0 | 0 | 0 | 0 | 275 | 417 | 472 | 4 | 1168 | 292 | 2 | 472 (2025) | | | | |
| 69. | Fieldfare | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 2 | 1 | 0 | 4 | 1 | 0 | 2 (2024) | | | | |
| 70. | Ring Ouzel | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 0 | 3 | 0.8 | 0 | 1 (2023) | | | | |
| 71. | thrush sp. | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 2 | 0.5 | 0 | 1 (2024) | | | | |
| 72. | Spotted Flycatcher | 0 | 0 | 0 | 0 | 0 | 0 | 13 | 32 | 24 | 0 | 69 | 17.3 | 0 | 32 (2024) | | | | |
| 73. | flycatcher sp. | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0.3 | 0 | 1 (2025) | | | | |
| 74. | Robin | 0 | 0 | 0 | 0 | 0 | 0 | 354 | 684 | 493 | 29 | 1560 | 390 | 6 | 684 (2024) | | | | |
| 75. | Pied Flycatcher | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 2 | 0 | 0 | 4 | 1 | 0 | 2 (2023) | | | | |
| 76. | Black Redstart | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 7 | 0 | 9 | 2.3 | 0 | 7 (2025) | | | | |
| 77. | Redstart | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 0.3 | 0 | 1 (2024) | | | | |
| 78. | House Sparrow | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0.3 | 0 | 1 (2025) | | | | |
| 79. | Dunnock | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 1 | 1 | 0 | 4 | 1 | 0 | 2 (2023) | | | | |
| 80. | Blue-headed Wagtail | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 4 | 1 | 0 | 5 | 1.3 | 0 | 4 (2024) | | | | |
| 81. | Yellow wagtail sp. | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0.3 | 0 | 1 (2025) | | | | |
| 82. | White Wagtail | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 2 | 0.5 | 0 | 1 (2023) | | | | |
| 83. | Meadow Pipit | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 1 | 0.3 | 0 | 1 (2023) | | | | |
| 84. | Tree Pipit | 0 | 0 | 0 | 0 | 0 | 0 | 23 | 40 | 57 | 0 | 120 | 30 | 0 | 57 (2025) | | | | |
| 85. | Chaffinch | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 4 | 0 | 4 | 1 | 0 | 4 (2025) | | | | |
| 86. | Brambling | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 6 | 0 | 0 | 8 | 2 | 0 | 6 (2024) | | | | |
| 87. | Bullfinch | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0.3 | 0 | 1 (2025) | | | | |
| 88. | Greenfinch | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 2 | 3 | 0.8 | 0 | 2 (2026) | | | | |
| 89. | Ortolan Bunting | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 2 | 4 | 0 | 7 | 1.8 | 0 | 4 (2025) | | | | |
| 90. | Reed Bunting | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 2 | 0 | 4 | 1 | 0 | 2 (2025) | | | | |
| 91. | Species unidentified | 0 | 0 | 0 | 0 | 0 | 0 | 10 | 102 | 175 | 15 | 302 | 76 | 0 | 175 (2025) | | | | |
| | Species | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 | Totals | Average | Present | Year Maximum | |
| |
Totals |
0 | 0 | 0 | 0 | 0 | 0 | 6089 | 18837 | 19961 | 2836 | 47723 | 11931 | 49 | | |
| |
Observation hours |
| | | | | | 1,047:36 | 2,281:38 | 2,557:46 | 468:59 | 6,355:59 | 1,589:00 | | | |