Also present
Totals Huisduinen (zeetrek) 2025
| Species | Jan | Feb | Mar | Apr | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 1. | Dark-bellied Brent Goose | 166 | 622 | 4807 | 1817 | 7412 | 279 | 7133 | 1077 ( 7 Mar) | 92 | 44 | 1 Jan | 19 Apr | ||||
| 2. | Canada Goose | 0 | 0 | 1 | 0 | 1 | 0 | 1 | 1 ( 3 Mar) | 2 | 1 | 3 Mar | 3 Mar | ||||
| 3. | Barnacle Goose | 0 | 76 | 910 | 476 | 1462 | 82 | 1380 | 695 ( 8 Mar) | 23 | 11 | 5 Feb | 19 Apr | ||||
| 4. | Greylag Goose | 14 | 459 | 285 | 327 | 1085 | 370 | 715 | 354 (15 Feb) | 79 | 38 | 13 Jan | 19 Apr | ||||
| 5. | Eurasian White-fronted Goose | 0 | 4 | 0 | 0 | 4 | 0 | 4 | 4 (15 Feb) | 2 | 1 | 15 Feb | 15 Feb | ||||
| 6. | Egyptian Goose | 0 | 23 | 53 | 65 | 141 | 34 | 107 | 23 ( 8 Mar) | 46 | 22 | 3 Feb | 19 Apr | ||||
| 7. | Shelduck | 7 | 14 | 95 | 144 | 260 | 20 | 240 | 53 ( 7 Apr) | 67 | 32 | 29 Jan | 19 Apr | ||||
| 8. | Shoveler | 0 | 24 | 123 | 152 | 299 | 3 | 296 | 61 ( 4 Apr) | 40 | 19 | 19 Feb | 19 Apr | ||||
| 9. | Gadwall | 0 | 11 | 11 | 19 | 41 | 19 | 22 | 9 (21 Feb) | 23 | 11 | 7 Feb | 16 Apr | ||||
| 10. | Wigeon | 226 | 197 | 3392 | 204 | 4019 | 41 | 3978 | 1476 (12 Mar) | 56 | 27 | 3 Jan | 9 Apr | ||||
| 11. | Mallard | 0 | 0 | 3 | 5 | 8 | 0 | 8 | 3 (31 Mar) | 6 | 3 | 31 Mar | 18 Apr | ||||
| 12. | Pintail | 0 | 12 | 49 | 185 | 246 | 0 | 246 | 167 ( 5 Apr) | 15 | 7 | 28 Feb | 19 Apr | ||||
| 13. | Teal | 14 | 112 | 2129 | 1015 | 3270 | 2 | 3268 | 597 ( 9 Apr) | 58 | 28 | 27 Jan | 14 Apr | ||||
| 14. | duck sp. | 1 | 1 | 1 | 5 | 8 | 4 | 4 | 3 ( 9 Apr) | 10 | 5 | 10 Jan | 18 Apr | ||||
| 15. | Tufted Duck | 5 | 0 | 3 | 0 | 8 | 2 | 6 | 2 (31 Jan) | 13 | 6 | 3 Jan | 26 Mar | ||||
| 16. | Scaup | 0 | 0 | 5 | 0 | 5 | 0 | 5 | 2 (10 Mar) | 6 | 3 | 10 Mar | 19 Mar | ||||
| 17. | Eider | 17 | 290 | 716 | 597 | 1620 | 657 | 963 | 194 (28 Feb) | 88 | 42 | 3 Jan | 19 Apr | ||||
| 18. | Velvet Scoter | 1 | 0 | 7 | 0 | 8 | 1 | 7 | 7 (14 Mar) | 4 | 2 | 6 Jan | 14 Mar | ||||
| 19. | Common Scoter | 77 | 198 | 2327 | 472 | 3074 | 419 | 2655 | 1349 (29 Mar) | 94 | 45 | 1 Jan | 19 Apr | ||||
| 20. | Goldeneye | 1 | 1 | 2 | 4 | 8 | 1 | 7 | 2 (21 Mar) | 10 | 5 | 8 Jan | 7 Apr | ||||
| 21. | Goosander | 0 | 2 | 0 | 0 | 2 | 1 | 1 | 1 ( 5 Feb) | 4 | 2 | 5 Feb | 15 Feb | ||||
| 22. | Red-breasted Merganser | 8 | 17 | 189 | 160 | 374 | 24 | 350 | 45 ( 4 Apr) | 75 | 36 | 6 Jan | 19 Apr | ||||
| 23. | Stock Dove | 14 | 0 | 6 | 0 | 20 | 16 | 4 | 14 (23 Jan) | 6 | 3 | 23 Jan | 29 Mar | ||||
| 24. | Woodpigeon | 0 | 2 | 11 | 17 | 30 | 4 | 26 | 4 ( 8 Mar) | 33 | 16 | 21 Feb | 19 Apr | ||||
| 25. | Collared Dove | 0 | 0 | 4 | 0 | 4 | 0 | 4 | 4 (17 Mar) | 2 | 1 | 17 Mar | 17 Mar | ||||
| 26. | Great Crested Grebe | 33 | 31 | 22 | 16 | 102 | 52 | 50 | 11 (29 Jan) | 71 | 34 | 1 Jan | 14 Apr | ||||
| 27. | Oystercatcher | 56 | 80 | 547 | 627 | 1310 | 199 | 1111 | 140 ( 5 Apr) | 98 | 47 | 3 Jan | 19 Apr | ||||
| 28. | Avocet | 0 | 0 | 163 | 13 | 176 | 0 | 176 | 67 ( 8 Mar) | 13 | 6 | 8 Mar | 19 Apr | ||||
| 29. | Grey Plover | 0 | 0 | 33 | 147 | 180 | 2 | 178 | 62 ( 5 Apr) | 19 | 9 | 17 Mar | 19 Apr | ||||
| 30. | Ringed Plover | 0 | 0 | 1 | 1 | 2 | 0 | 2 | 1 (21 Mar) | 4 | 2 | 21 Mar | 12 Apr | ||||
| Species | Jan | Feb | Mar | Apr | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 31. | Lapwing | 0 | 0 | 0 | 1 | 1 | 0 | 1 | 1 ( 5 Apr) | 2 | 1 | 5 Apr | 5 Apr | ||||
| 32. | Whimbrel | 0 | 0 | 0 | 490 | 490 | 0 | 490 | 228 (19 Apr) | 17 | 8 | 2 Apr | 19 Apr | ||||
| 33. | Curlew | 1 | 2 | 33 | 9 | 45 | 5 | 40 | 9 (22 Mar) | 33 | 16 | 15 Jan | 12 Apr | ||||
| 34. | Bar-tailed Godwit | 0 | 0 | 0 | 7 | 7 | 0 | 7 | 7 (19 Apr) | 2 | 1 | 19 Apr | 19 Apr | ||||
| 35. | Black-tailed Godwit | 0 | 0 | 1 | 0 | 1 | 0 | 1 | 1 (10 Mar) | 2 | 1 | 10 Mar | 10 Mar | ||||
| 36. | Common Sandpiper | 0 | 0 | 0 | 1 | 1 | 0 | 1 | 1 ( 4 Apr) | 2 | 1 | 4 Apr | 4 Apr | ||||
| 37. | Green Sandpiper | 0 | 0 | 0 | 1 | 1 | 0 | 1 | 1 ( 2 Apr) | 2 | 1 | 2 Apr | 2 Apr | ||||
| 38. | Redshank | 1 | 0 | 2 | 5 | 8 | 2 | 6 | 2 ( 4 Apr) | 15 | 7 | 29 Jan | 12 Apr | ||||
| 39. | Turnstone | 0 | 3 | 15 | 2 | 20 | 3 | 17 | 9 (22 Mar) | 10 | 5 | 15 Feb | 5 Apr | ||||
| 40. | Knot | 0 | 0 | 0 | 81 | 81 | 0 | 81 | 74 (12 Apr) | 8 | 4 | 4 Apr | 19 Apr | ||||
| 41. | Ruff | 0 | 0 | 8 | 1 | 9 | 0 | 9 | 8 (29 Mar) | 4 | 2 | 29 Mar | 5 Apr | ||||
| 42. | wader sp. | 0 | 1 | 0 | 27 | 28 | 1 | 27 | 24 ( 9 Apr) | 6 | 3 | 21 Feb | 18 Apr | ||||
| 43. | Sanderling | 0 | 15 | 102 | 211 | 328 | 5 | 323 | 42 (10 Mar) | 40 | 19 | 17 Feb | 19 Apr | ||||
| 44. | Dunlin | 4 | 25 | 1861 | 2757 | 4647 | 9 | 4638 | 1645 ( 4 Apr) | 58 | 28 | 8 Jan | 19 Apr | ||||
| 45. | Little Tern | 0 | 0 | 0 | 15 | 15 | 1 | 14 | 13 (19 Apr) | 6 | 3 | 14 Apr | 19 Apr | ||||
| 46. | Black Tern | 0 | 0 | 0 | 18 | 18 | 0 | 18 | 13 (18 Apr) | 6 | 3 | 16 Apr | 19 Apr | ||||
| 47. | Arctic Tern | 0 | 0 | 0 | 8 | 8 | 0 | 8 | 6 (19 Apr) | 6 | 3 | 14 Apr | 19 Apr | ||||
| 48. | Common/Arctic Tern | 0 | 0 | 0 | 40 | 40 | 0 | 40 | 40 (19 Apr) | 2 | 1 | 19 Apr | 19 Apr | ||||
| 49. | Common Tern | 0 | 0 | 3 | 829 | 832 | 258 | 574 | 245 (19 Apr) | 25 | 12 | 31 Mar | 19 Apr | ||||
| 50. | sterna sp. | 0 | 0 | 0 | 1 | 1 | 0 | 1 | 1 (12 Apr) | 2 | 1 | 12 Apr | 12 Apr | ||||
| 51. | Sandwich Tern | 0 | 0 | 179 | 7256 | 7435 | 2716 | 4719 | 1609 (12 Apr) | 42 | 20 | 8 Mar | 19 Apr | ||||
| 52. | Little Gull | 2 | 1 | 302 | 399 | 704 | 29 | 675 | 270 (16 Mar) | 35 | 17 | 10 Jan | 19 Apr | ||||
| 53. | Kittiwake | 113 | 0 | 0 | 0 | 113 | 64 | 49 | 43 ( 8 Jan) | 13 | 6 | 1 Jan | 29 Jan | ||||
| 54. | Black-headed Gull | 491 | 630 | 1630 | 1516 | 4267 | 980 | 3287 | 688 ( 4 Apr) | 100 | 48 | 1 Jan | 19 Apr | ||||
| 55. | Mediterranean Gull | 0 | 0 | 0 | 2 | 2 | 0 | 2 | 2 (19 Apr) | 2 | 1 | 19 Apr | 19 Apr | ||||
| 56. | Common Gull | 540 | 251 | 673 | 756 | 2220 | 686 | 1534 | 278 (11 Apr) | 98 | 47 | 1 Jan | 19 Apr | ||||
| 57. | Caspian Gull | 0 | 0 | 0 | 1 | 1 | 1 | 0 | 1 (14 Apr) | 2 | 1 | 14 Apr | 14 Apr | ||||
| 58. | Great Black-backed Gull | 148 | 66 | 200 | 94 | 508 | 183 | 325 | 39 (23 Jan) | 100 | 48 | 1 Jan | 19 Apr | ||||
| 59. | Lesser Black-backed Gull | 15 | 28 | 1358 | 1192 | 2593 | 93 | 2500 | 302 (31 Mar) | 81 | 39 | 1 Jan | 19 Apr | ||||
| 60. | Guillemot | 0 | 0 | 1 | 0 | 1 | 0 | 1 | 1 (31 Mar) | 2 | 1 | 31 Mar | 31 Mar | ||||
| Species | Jan | Feb | Mar | Apr | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 61. | Red-throated Diver | 29 | 13 | 48 | 12 | 102 | 20 | 82 | 17 (31 Mar) | 79 | 38 | 1 Jan | 19 Apr | ||||
| 62. | Black-throated Diver | 1 | 1 | 15 | 5 | 22 | 1 | 21 | 6 (29 Mar) | 25 | 12 | 23 Jan | 18 Apr | ||||
| 63. | diver sp. | 0 | 0 | 11 | 0 | 11 | 0 | 11 | 9 (29 Mar) | 4 | 2 | 16 Mar | 29 Mar | ||||
| 64. | Bulwer's Petrel | 1 | 0 | 0 | 0 | 1 | 0 | 1 | 1 ( 1 Jan) | 2 | 1 | 1 Jan | 1 Jan | ||||
| 65. | Gannet | 10 | 8 | 160 | 15 | 193 | 13 | 180 | 92 (22 Mar) | 48 | 23 | 1 Jan | 19 Apr | ||||
| 66. | Cormorant | 749 | 370 | 1921 | 2483 | 5523 | 2399 | 3124 | 391 (18 Apr) | 100 | 48 | 1 Jan | 19 Apr | ||||
| 67. | Shag | 1 | 0 | 0 | 0 | 1 | 1 | 0 | 1 (29 Jan) | 2 | 1 | 29 Jan | 29 Jan | ||||
| 68. | Spoonbill | 0 | 0 | 0 | 4 | 4 | 0 | 4 | 3 ( 5 Apr) | 4 | 2 | 5 Apr | 19 Apr | ||||
| 69. | Great White Egret | 0 | 0 | 3 | 0 | 3 | 1 | 2 | 2 (22 Mar) | 4 | 2 | 3 Mar | 22 Mar | ||||
| 70. | Grey Heron | 0 | 0 | 3 | 4 | 7 | 3 | 4 | 2 (22 Mar) | 8 | 4 | 10 Mar | 9 Apr | ||||
| 71. | Marsh Harrier | 0 | 0 | 1 | 1 | 2 | 0 | 2 | 1 (17 Mar) | 4 | 2 | 17 Mar | 5 Apr | ||||
| 72. | Hen Harrier | 1 | 0 | 0 | 0 | 1 | 0 | 1 | 1 (29 Jan) | 2 | 1 | 29 Jan | 29 Jan | ||||
| 73. | White-tailed Eagle | 0 | 0 | 1 | 1 | 2 | 1 | 1 | 1 (19 Mar) | 4 | 2 | 19 Mar | 12 Apr | ||||
| 74. | Common Buzzard | 0 | 0 | 1 | 1 | 2 | 0 | 2 | 1 (22 Mar) | 4 | 2 | 22 Mar | 5 Apr | ||||
| 75. | Magpie | 0 | 0 | 14 | 0 | 14 | 5 | 9 | 7 (22 Mar) | 4 | 2 | 22 Mar | 29 Mar | ||||
| 76. | Jackdaw | 0 | 0 | 11 | 0 | 11 | 0 | 11 | 6 (26 Mar) | 4 | 2 | 21 Mar | 26 Mar | ||||
| 77. | Rook | 0 | 0 | 1 | 0 | 1 | 0 | 1 | 1 (14 Mar) | 2 | 1 | 14 Mar | 14 Mar | ||||
| 78. | Carrion Crow | 0 | 0 | 12 | 19 | 31 | 11 | 20 | 7 ( 5 Apr) | 31 | 15 | 5 Mar | 19 Apr | ||||
| 79. | Sand Martin | 0 | 0 | 0 | 17 | 17 | 0 | 17 | 4 ( 4 Apr) | 10 | 5 | 2 Apr | 19 Apr | ||||
| 80. | Swallow | 0 | 0 | 0 | 35 | 35 | 1 | 34 | 13 ( 5 Apr) | 13 | 6 | 4 Apr | 19 Apr | ||||
| 81. | House Martin | 0 | 0 | 0 | 2 | 2 | 0 | 2 | 2 ( 4 Apr) | 2 | 1 | 4 Apr | 4 Apr | ||||
| 82. | Starling | 0 | 0 | 195 | 155 | 350 | 38 | 312 | 91 (21 Mar) | 15 | 7 | 16 Mar | 18 Apr | ||||
| 83. | Blackbird | 0 | 0 | 1 | 0 | 1 | 0 | 1 | 1 (21 Mar) | 2 | 1 | 21 Mar | 21 Mar | ||||
| 84. | Ring Ouzel | 0 | 0 | 0 | 1 | 1 | 0 | 1 | 1 ( 5 Apr) | 2 | 1 | 5 Apr | 5 Apr | ||||
| 85. | Robin | 0 | 0 | 0 | 1 | 1 | 0 | 1 | 1 (12 Apr) | 2 | 1 | 12 Apr | 12 Apr | ||||
| 86. | Dunnock | 0 | 0 | 1 | 0 | 1 | 1 | 0 | 1 ( 3 Mar) | 2 | 1 | 3 Mar | 3 Mar | ||||
| 87. | White Wagtail | 0 | 0 | 13 | 10 | 23 | 2 | 21 | 11 (22 Mar) | 15 | 7 | 14 Mar | 19 Apr | ||||
| 88. | alba wagtail sp. | 0 | 0 | 4 | 4 | 8 | 0 | 8 | 3 (26 Mar) | 8 | 4 | 19 Mar | 16 Apr | ||||
| 89. | Meadow Pipit | 0 | 0 | 20 | 19 | 39 | 0 | 39 | 10 (22 Mar) | 23 | 11 | 8 Mar | 19 Apr | ||||
| 90. | Chaffinch | 0 | 0 | 1 | 0 | 1 | 0 | 1 | 1 (22 Mar) | 2 | 1 | 22 Mar | 22 Mar | ||||
| Species | Jan | Feb | Mar | Apr | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 91. | Linnet | 0 | 0 | 4 | 9 | 13 | 0 | 13 | 4 (12 Apr) | 10 | 5 | 19 Mar | 19 Apr | ||||
| 92. | Goldfinch | 0 | 0 | 0 | 2 | 2 | 0 | 2 | 2 ( 5 Apr) | 2 | 1 | 5 Apr | 5 Apr | ||||
| 93. | Reed Bunting | 0 | 0 | 0 | 2 | 2 | 0 | 2 | 2 ( 4 Apr) | 2 | 1 | 4 Apr | 4 Apr | ||||
| Other species | |||||||||||||||||
| Species | Jan | Feb | Mar | Apr | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 1. | Harbour Porpoise | 0 | 3 | 9 | 0 | 12 | 3 | 9 | 6 (16 Mar) | 6 | 3 | 7 Feb | 26 Mar | ||||
| 2. | Grey seal | 3 | 0 | 1 | 2 | 6 | 1 | 5 | 2 ( 9 Apr) | 10 | 5 | 6 Jan | 9 Apr | ||||
| 3. | Common Seal | 14 | 16 | 23 | 7 | 60 | 26 | 34 | 10 (16 Mar) | 48 | 23 | 6 Jan | 18 Apr | ||||
| Other species | |||||||||||||||||
| Species | Jan | Feb | Mar | Apr | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 1. | Small Tortoiseshell | 0 | 0 | 1 | 1 | 2 | 0 | 2 | 1 (22 Mar) | 4 | 2 | 22 Mar | 5 Apr | ||||
| 2. | Brimstone | 0 | 0 | 0 | 1 | 1 | 0 | 1 | 1 (12 Apr) | 2 | 1 | 12 Apr | 12 Apr | ||||
| 3. | European Peacock | 0 | 0 | 1 | 4 | 5 | 2 | 3 | 2 (12 Apr) | 6 | 3 | 22 Mar | 19 Apr | ||||
| 4. | Green-veined White | 0 | 0 | 0 | 13 | 13 | 7 | 6 | 11 (12 Apr) | 4 | 2 | 12 Apr | 19 Apr | ||||
| 5. | Small White | 0 | 0 | 0 | 1 | 1 | 1 | 0 | 1 (12 Apr) | 2 | 1 | 12 Apr | 12 Apr | ||||
| 6. | white sp. (butterfly) | 0 | 0 | 0 | 32 | 32 | 19 | 13 | 32 (12 Apr) | 2 | 1 | 12 Apr | 12 Apr | ||||
| Other species | |||||||||||||||||
| Species | Jan | Feb | Mar | Apr | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 1. | Bumblebee sp. | 0 | 0 | 8 | 22 | 30 | 11 | 19 | 7 (19 Apr) | 17 | 8 | 8 Mar | 19 Apr | ||||
| Species | Jan | Feb | Mar | Apr | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| Totals | 2764 | 3609 | 24747 | 25073 | 56193 | 9835 | 46358 | 100 | 48 | ||||||||
| Observation hours | 24:30 | 29:00 | 77:00 | 58:30 | 189:00 | ||||||||||||
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