Also present
Totals Slikken van de Heen 2024
| Species | Jul | Aug | Sep | Oct | Nov | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 1. | Dark-bellied Brent Goose | 0 | 0 | 2 | 67 | 0 | 69 | 60 | 9 | 28 (16 Oct) | 23 | 5 | 29 Sep | 16 Oct | ||||
| 2. | Canada Goose | 0 | 0 | 0 | 6 | 23 | 29 | 29 | 0 | 22 ( 2 Nov) | 14 | 3 | 3 Oct | 3 Nov | ||||
| 3. | Barnacle Goose | 0 | 0 | 5 | 220 | 520 | 745 | 740 | 5 | 360 ( 2 Nov) | 45 | 10 | 29 Sep | 12 Nov | ||||
| 4. | Greylag Goose | 12 | 0 | 47 | 815 | 542 | 1416 | 1369 | 47 | 360 (16 Oct) | 73 | 16 | 5 Jul | 12 Nov | ||||
| 5. | Pink-footed Goose | 0 | 0 | 0 | 0 | 38 | 38 | 38 | 0 | 37 ( 3 Nov) | 9 | 2 | 2 Nov | 3 Nov | ||||
| 6. | Tundra Bean Goose | 0 | 0 | 0 | 32 | 60 | 92 | 88 | 4 | 40 ( 3 Nov) | 27 | 6 | 16 Oct | 12 Nov | ||||
| 7. | Eurasian White-fronted Goose | 0 | 0 | 0 | 1299 | 247 | 1546 | 1500 | 46 | 449 (16 Oct) | 41 | 9 | 6 Oct | 3 Nov | ||||
| 8. | Black Swan | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 1 | 1 ( 3 Nov) | 5 | 1 | 3 Nov | 3 Nov | ||||
| 9. | Mute Swan | 0 | 0 | 0 | 1 | 3 | 4 | 4 | 0 | 3 ( 2 Nov) | 9 | 2 | 16 Oct | 2 Nov | ||||
| 10. | Shelduck | 0 | 0 | 7 | 20 | 3 | 30 | 17 | 13 | 7 ( 6 Oct) | 27 | 6 | 17 Sep | 3 Nov | ||||
| 11. | Shoveler | 0 | 0 | 4 | 0 | 1 | 5 | 5 | 0 | 2 (19 Sep) | 14 | 3 | 19 Sep | 12 Nov | ||||
| 12. | Gadwall | 3 | 0 | 11 | 15 | 9 | 38 | 34 | 4 | 9 ( 2 Nov) | 45 | 10 | 31 Jul | 2 Nov | ||||
| 13. | Wigeon | 0 | 0 | 32 | 0 | 0 | 32 | 14 | 18 | 12 (22 Sep) | 18 | 4 | 7 Sep | 22 Sep | ||||
| 14. | Mallard | 0 | 0 | 4 | 6 | 3 | 13 | 9 | 4 | 4 ( 7 Sep) | 27 | 6 | 7 Sep | 3 Nov | ||||
| 15. | Pintail | 0 | 0 | 27 | 126 | 21 | 174 | 156 | 18 | 42 (25 Oct) | 73 | 16 | 7 Sep | 12 Nov | ||||
| 16. | Teal | 0 | 0 | 1 | 53 | 10 | 64 | 30 | 34 | 24 (12 Oct) | 27 | 6 | 19 Sep | 3 Nov | ||||
| 17. | Pochard | 0 | 0 | 5 | 0 | 0 | 5 | 1 | 4 | 5 ( 1 Sep) | 5 | 1 | 1 Sep | 1 Sep | ||||
| 18. | Tufted Duck | 0 | 0 | 4 | 3 | 0 | 7 | 3 | 4 | 4 (17 Sep) | 9 | 2 | 17 Sep | 24 Oct | ||||
| 19. | Goldeneye | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 0 | 1 ( 3 Nov) | 5 | 1 | 3 Nov | 3 Nov | ||||
| 20. | Goosander | 0 | 0 | 7 | 0 | 0 | 7 | 7 | 0 | 7 (22 Sep) | 5 | 1 | 22 Sep | 22 Sep | ||||
| 21. | Swift | 1122 | 0 | 6 | 0 | 0 | 1128 | 1128 | 0 | 1121 ( 5 Jul) | 23 | 5 | 5 Jul | 22 Sep | ||||
| 22. | Stock Dove | 7 | 0 | 76 | 116 | 54 | 253 | 250 | 3 | 48 (25 Oct) | 91 | 20 | 31 Jul | 12 Nov | ||||
| 23. | Woodpigeon | 0 | 0 | 104 | 1837 | 306 | 2247 | 2247 | 0 | 567 (15 Oct) | 82 | 18 | 7 Sep | 12 Nov | ||||
| 24. | Collared Dove | 0 | 0 | 2 | 0 | 0 | 2 | 2 | 0 | 1 (22 Sep) | 9 | 2 | 22 Sep | 29 Sep | ||||
| 25. | Oystercatcher | 5 | 0 | 0 | 0 | 0 | 5 | 0 | 5 | 5 (31 Jul) | 5 | 1 | 31 Jul | 31 Jul | ||||
| 26. | Grey Plover | 0 | 0 | 1 | 0 | 1 | 2 | 2 | 0 | 1 (22 Sep) | 9 | 2 | 22 Sep | 3 Nov | ||||
| 27. | Golden Plover | 0 | 0 | 162 | 3404 | 211 | 3777 | 3657 | 120 | 1428 (16 Oct) | 68 | 15 | 1 Sep | 12 Nov | ||||
| 28. | Dotterel | 0 | 0 | 6 | 0 | 0 | 6 | 2 | 4 | 4 ( 1 Sep) | 9 | 2 | 1 Sep | 7 Sep | ||||
| 29. | Ringed Plover | 0 | 0 | 7 | 0 | 0 | 7 | 0 | 7 | 5 (22 Sep) | 9 | 2 | 22 Sep | 29 Sep | ||||
| 30. | Lapwing | 2 | 0 | 295 | 4795 | 1026 | 6118 | 6048 | 70 | 1344 (25 Oct) | 91 | 20 | 31 Jul | 12 Nov | ||||
| Species | Jul | Aug | Sep | Oct | Nov | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 31. | Whimbrel | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 1 ( 5 Jul) | 5 | 1 | 5 Jul | 5 Jul | ||||
| 32. | Curlew | 2 | 0 | 2 | 5 | 2 | 11 | 11 | 0 | 4 (15 Oct) | 23 | 5 | 5 Jul | 2 Nov | ||||
| 33. | Snipe | 0 | 0 | 13 | 10 | 1 | 24 | 24 | 0 | 8 ( 1 Sep) | 50 | 11 | 1 Sep | 2 Nov | ||||
| 34. | Green Sandpiper | 1 | 0 | 2 | 2 | 0 | 5 | 4 | 1 | 2 (19 Sep) | 18 | 4 | 31 Jul | 25 Oct | ||||
| 35. | Greenshank | 0 | 0 | 1 | 0 | 0 | 1 | 1 | 0 | 1 ( 1 Sep) | 5 | 1 | 1 Sep | 1 Sep | ||||
| 36. | Ruff | 4 | 0 | 2 | 1 | 14 | 21 | 1 | 20 | 14 (11 Nov) | 18 | 4 | 31 Jul | 11 Nov | ||||
| 37. | Common Tern | 0 | 0 | 12 | 0 | 0 | 12 | 12 | 0 | 8 ( 1 Sep) | 14 | 3 | 1 Sep | 17 Sep | ||||
| 38. | Black-headed Gull | 18 | 0 | 15 | 224 | 108 | 365 | 365 | 0 | 135 (30 Oct) | 59 | 13 | 31 Jul | 11 Nov | ||||
| 39. | Mediterranean Gull | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 1 ( 5 Jul) | 5 | 1 | 5 Jul | 5 Jul | ||||
| 40. | Common Gull | 4 | 0 | 18 | 6 | 10 | 38 | 38 | 0 | 9 (29 Sep) | 45 | 10 | 31 Jul | 12 Nov | ||||
| 41. | Caspian Gull | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 1 | 1 ( 2 Nov) | 5 | 1 | 2 Nov | 2 Nov | ||||
| 42. | Herring Gull | 16 | 0 | 10 | 26 | 2 | 54 | 54 | 0 | 15 (31 Jul) | 50 | 11 | 5 Jul | 11 Nov | ||||
| 43. | Great Black-backed Gull | 0 | 0 | 1 | 1 | 0 | 2 | 2 | 0 | 1 (29 Sep) | 9 | 2 | 29 Sep | 15 Oct | ||||
| 44. | Lesser Black-backed Gull | 40 | 0 | 10 | 2 | 0 | 52 | 52 | 0 | 28 ( 5 Jul) | 32 | 7 | 5 Jul | 16 Oct | ||||
| 45. | Cormorant | 7 | 0 | 278 | 1354 | 128 | 1767 | 1767 | 0 | 834 ( 3 Oct) | 86 | 19 | 31 Jul | 12 Nov | ||||
| 46. | Spoonbill | 0 | 0 | 115 | 27 | 2 | 144 | 144 | 0 | 109 (29 Sep) | 36 | 8 | 7 Sep | 2 Nov | ||||
| 47. | Little Egret | 0 | 0 | 3 | 1 | 0 | 4 | 4 | 0 | 3 (29 Sep) | 9 | 2 | 29 Sep | 16 Oct | ||||
| 48. | Cattle Egret | 0 | 0 | 0 | 1 | 0 | 1 | 1 | 0 | 1 (25 Oct) | 5 | 1 | 25 Oct | 25 Oct | ||||
| 49. | Great White Egret | 2 | 0 | 23 | 40 | 5 | 70 | 64 | 6 | 12 (25 Oct) | 64 | 14 | 31 Jul | 3 Nov | ||||
| 50. | Grey Heron | 0 | 0 | 6 | 10 | 10 | 26 | 26 | 0 | 10 ( 2 Nov) | 32 | 7 | 1 Sep | 2 Nov | ||||
| 51. | Osprey | 0 | 0 | 6 | 2 | 0 | 8 | 8 | 0 | 6 ( 7 Sep) | 9 | 2 | 7 Sep | 3 Oct | ||||
| 52. | Honey Buzzard | 0 | 0 | 2 | 0 | 0 | 2 | 2 | 0 | 1 ( 1 Sep) | 9 | 2 | 1 Sep | 7 Sep | ||||
| 53. | Sparrowhawk | 0 | 0 | 6 | 17 | 7 | 30 | 30 | 0 | 8 (25 Oct) | 55 | 12 | 7 Sep | 12 Nov | ||||
| 54. | Marsh Harrier | 0 | 0 | 31 | 5 | 1 | 37 | 37 | 0 | 17 ( 7 Sep) | 45 | 10 | 1 Sep | 2 Nov | ||||
| 55. | Hen Harrier | 0 | 0 | 0 | 2 | 1 | 3 | 3 | 0 | 2 (12 Oct) | 9 | 2 | 12 Oct | 3 Nov | ||||
| 56. | Common Buzzard | 0 | 0 | 38 | 17 | 3 | 58 | 58 | 0 | 19 ( 7 Sep) | 36 | 8 | 1 Sep | 3 Nov | ||||
| 57. | Great Spotted Woodpecker | 0 | 0 | 3 | 7 | 0 | 10 | 10 | 0 | 5 (16 Oct) | 18 | 4 | 7 Sep | 16 Oct | ||||
| 58. | Green Woodpecker | 0 | 0 | 0 | 1 | 0 | 1 | 1 | 0 | 1 (16 Oct) | 5 | 1 | 16 Oct | 16 Oct | ||||
| 59. | Kestrel | 0 | 0 | 11 | 3 | 0 | 14 | 14 | 0 | 6 ( 7 Sep) | 27 | 6 | 1 Sep | 25 Oct | ||||
| 60. | Red-footed Falcon | 0 | 0 | 1 | 0 | 0 | 1 | 1 | 0 | 1 ( 7 Sep) | 5 | 1 | 7 Sep | 7 Sep | ||||
| Species | Jul | Aug | Sep | Oct | Nov | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 61. | Merlin | 0 | 0 | 0 | 3 | 0 | 3 | 3 | 0 | 1 ( 3 Oct) | 14 | 3 | 3 Oct | 24 Oct | ||||
| 62. | Hobby | 0 | 0 | 2 | 0 | 0 | 2 | 2 | 0 | 1 (22 Sep) | 9 | 2 | 22 Sep | 29 Sep | ||||
| 63. | Peregrine | 0 | 0 | 0 | 1 | 0 | 1 | 1 | 0 | 1 (25 Oct) | 5 | 1 | 25 Oct | 25 Oct | ||||
| 64. | Jay | 0 | 0 | 13 | 62 | 0 | 75 | 75 | 0 | 18 (16 Oct) | 45 | 10 | 19 Sep | 25 Oct | ||||
| 65. | Magpie | 0 | 0 | 1 | 0 | 0 | 1 | 1 | 0 | 1 (29 Sep) | 5 | 1 | 29 Sep | 29 Sep | ||||
| 66. | Jackdaw | 0 | 0 | 17 | 995 | 78 | 1090 | 1087 | 3 | 633 (15 Oct) | 59 | 13 | 19 Sep | 11 Nov | ||||
| 67. | Rook | 0 | 0 | 0 | 2 | 0 | 2 | 2 | 0 | 2 (16 Oct) | 5 | 1 | 16 Oct | 16 Oct | ||||
| 68. | Carrion Crow | 0 | 0 | 15 | 40 | 2 | 57 | 57 | 0 | 10 ( 3 Oct) | 55 | 12 | 7 Sep | 2 Nov | ||||
| 69. | Blue Tit | 0 | 0 | 61 | 73 | 19 | 153 | 153 | 0 | 23 (30 Oct) | 73 | 16 | 7 Sep | 3 Nov | ||||
| 70. | Great Tit | 0 | 0 | 88 | 103 | 1 | 192 | 192 | 0 | 41 (29 Sep) | 68 | 15 | 7 Sep | 2 Nov | ||||
| 71. | Wood Lark | 0 | 0 | 0 | 59 | 0 | 59 | 59 | 0 | 29 (25 Oct) | 23 | 5 | 3 Oct | 25 Oct | ||||
| 72. | Skylark | 0 | 0 | 0 | 1269 | 29 | 1298 | 1298 | 0 | 763 (16 Oct) | 50 | 11 | 3 Oct | 11 Nov | ||||
| 73. | Sand Martin | 10 | 0 | 1620 | 2 | 0 | 1632 | 1632 | 0 | 1071 ( 7 Sep) | 27 | 6 | 5 Jul | 3 Oct | ||||
| 74. | Swallow | 1 | 0 | 510 | 113 | 0 | 624 | 624 | 0 | 332 ( 7 Sep) | 50 | 11 | 5 Jul | 16 Oct | ||||
| 75. | House Martin | 1 | 0 | 495 | 16 | 0 | 512 | 512 | 0 | 305 ( 7 Sep) | 32 | 7 | 31 Jul | 3 Oct | ||||
| 76. | Long-tailed Tit | 0 | 0 | 0 | 13 | 0 | 13 | 13 | 0 | 13 (25 Oct) | 5 | 1 | 25 Oct | 25 Oct | ||||
| 77. | Willow Warbler | 0 | 0 | 2 | 0 | 0 | 2 | 2 | 0 | 1 ( 7 Sep) | 9 | 2 | 7 Sep | 22 Sep | ||||
| 78. | Chiffchaff | 2 | 0 | 24 | 5 | 1 | 32 | 32 | 0 | 9 ( 7 Sep) | 55 | 12 | 31 Jul | 3 Nov | ||||
| 79. | Firecrest | 0 | 0 | 0 | 3 | 0 | 3 | 3 | 0 | 2 (24 Oct) | 9 | 2 | 24 Oct | 25 Oct | ||||
| 80. | Goldcrest | 0 | 0 | 1 | 11 | 3 | 15 | 15 | 0 | 6 (24 Oct) | 32 | 7 | 22 Sep | 11 Nov | ||||
| 81. | Starling | 3983 | 0 | 2890 | 8313 | 542 | 15728 | 15708 | 20 | 3904 (31 Jul) | 91 | 20 | 5 Jul | 11 Nov | ||||
| 82. | Song Thrush | 0 | 0 | 34 | 1544 | 147 | 1725 | 1725 | 0 | 822 (15 Oct) | 68 | 15 | 21 Sep | 11 Nov | ||||
| 83. | Mistle Thrush | 0 | 0 | 0 | 33 | 4 | 37 | 37 | 0 | 15 (15 Oct) | 32 | 7 | 6 Oct | 3 Nov | ||||
| 84. | Redwing | 0 | 0 | 0 | 10081 | 1159 | 11240 | 11240 | 0 | 6019 (15 Oct) | 45 | 10 | 6 Oct | 12 Nov | ||||
| 85. | Blackbird | 0 | 0 | 2 | 24 | 7 | 33 | 33 | 0 | 6 (16 Oct) | 50 | 11 | 29 Sep | 12 Nov | ||||
| 86. | Fieldfare | 0 | 0 | 0 | 9 | 436 | 445 | 445 | 0 | 411 ( 2 Nov) | 27 | 6 | 15 Oct | 12 Nov | ||||
| 87. | Ring Ouzel | 0 | 0 | 0 | 2 | 0 | 2 | 2 | 0 | 2 (15 Oct) | 5 | 1 | 15 Oct | 15 Oct | ||||
| 88. | Tree Sparrow | 0 | 0 | 1 | 0 | 0 | 1 | 1 | 0 | 1 (21 Sep) | 5 | 1 | 21 Sep | 21 Sep | ||||
| 89. | Dunnock | 0 | 0 | 23 | 10 | 0 | 33 | 33 | 0 | 11 ( 7 Sep) | 41 | 9 | 7 Sep | 30 Oct | ||||
| 90. | Yellow wagtail sp. | 0 | 0 | 18 | 0 | 0 | 18 | 18 | 0 | 13 ( 7 Sep) | 14 | 3 | 1 Sep | 19 Sep | ||||
| Species | Jul | Aug | Sep | Oct | Nov | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 91. | Grey Wagtail | 0 | 0 | 7 | 5 | 0 | 12 | 12 | 0 | 5 (22 Sep) | 23 | 5 | 22 Sep | 25 Oct | ||||
| 92. | alba wagtail sp. | 0 | 0 | 19 | 22 | 2 | 43 | 43 | 0 | 10 (29 Sep) | 55 | 12 | 17 Sep | 3 Nov | ||||
| 93. | Meadow Pipit | 0 | 0 | 386 | 105 | 31 | 522 | 522 | 0 | 256 (29 Sep) | 73 | 16 | 19 Sep | 11 Nov | ||||
| 94. | Tree Pipit | 1 | 0 | 17 | 0 | 0 | 18 | 18 | 0 | 11 ( 1 Sep) | 23 | 5 | 31 Jul | 22 Sep | ||||
| 95. | Water Pipit | 0 | 0 | 0 | 2 | 1 | 3 | 3 | 0 | 1 (24 Oct) | 14 | 3 | 24 Oct | 11 Nov | ||||
| 96. | Chaffinch | 0 | 0 | 142 | 4827 | 152 | 5121 | 5120 | 1 | 1140 (12 Oct) | 73 | 16 | 19 Sep | 12 Nov | ||||
| 97. | Brambling | 0 | 0 | 0 | 14 | 10 | 24 | 24 | 0 | 8 ( 3 Nov) | 41 | 9 | 6 Oct | 12 Nov | ||||
| 98. | Hawfinch | 0 | 0 | 0 | 13 | 2 | 15 | 15 | 0 | 9 (25 Oct) | 23 | 5 | 24 Oct | 3 Nov | ||||
| 99. | Bullfinch | 0 | 0 | 0 | 2 | 0 | 2 | 2 | 0 | 2 (25 Oct) | 5 | 1 | 25 Oct | 25 Oct | ||||
| 100. | Greenfinch | 1 | 0 | 18 | 26 | 0 | 45 | 45 | 0 | 10 ( 1 Sep) | 41 | 9 | 31 Jul | 25 Oct | ||||
| 101. | Linnet | 0 | 0 | 6 | 4 | 0 | 10 | 10 | 0 | 3 (19 Sep) | 27 | 6 | 1 Sep | 25 Oct | ||||
| 102. | Goldfinch | 0 | 0 | 4 | 60 | 23 | 87 | 87 | 0 | 15 (16 Oct) | 50 | 11 | 29 Sep | 12 Nov | ||||
| 103. | Siskin | 0 | 0 | 39 | 370 | 21 | 430 | 430 | 0 | 139 (25 Oct) | 59 | 13 | 22 Sep | 12 Nov | ||||
| 104. | Reed Bunting | 0 | 0 | 3 | 55 | 11 | 69 | 69 | 0 | 27 (24 Oct) | 32 | 7 | 22 Sep | 3 Nov | ||||
| Other species | ||||||||||||||||||
| Species | Jul | Aug | Sep | Oct | Nov | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 1. | Small Tortoiseshell | 0 | 0 | 2 | 0 | 0 | 2 | 2 | 0 | 2 ( 7 Sep) | 5 | 1 | 7 Sep | 7 Sep | ||||
| 2. | European Peacock | 0 | 0 | 79 | 2 | 0 | 81 | 81 | 0 | 75 ( 7 Sep) | 14 | 3 | 1 Sep | 24 Oct | ||||
| 3. | Swallowtail | 0 | 0 | 2 | 0 | 0 | 2 | 2 | 0 | 2 ( 7 Sep) | 5 | 1 | 7 Sep | 7 Sep | ||||
| 4. | Speckled Wood | 0 | 0 | 8 | 1 | 0 | 9 | 9 | 0 | 8 ( 7 Sep) | 9 | 2 | 7 Sep | 25 Oct | ||||
| 5. | white sp. (butterfly) | 0 | 0 | 330 | 10 | 0 | 340 | 340 | 0 | 291 ( 7 Sep) | 32 | 7 | 1 Sep | 25 Oct | ||||
| 6. | Red Admiral | 0 | 0 | 283 | 4 | 0 | 287 | 287 | 0 | 242 ( 7 Sep) | 27 | 6 | 1 Sep | 25 Oct | ||||
| 7. | Painted Lady | 0 | 0 | 2 | 0 | 0 | 2 | 2 | 0 | 2 ( 7 Sep) | 5 | 1 | 7 Sep | 7 Sep | ||||
| Other species | ||||||||||||||||||
| Species | Jul | Aug | Sep | Oct | Nov | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 1. | Darter unknown | 0 | 0 | 66 | 53 | 0 | 119 | 119 | 0 | 66 ( 7 Sep) | 23 | 5 | 7 Sep | 25 Oct | ||||
| 2. | Migrant Hawker | 0 | 0 | 0 | 1 | 0 | 1 | 1 | 0 | 1 (25 Oct) | 5 | 1 | 25 Oct | 25 Oct | ||||
| Other species | ||||||||||||||||||
| Species | Jul | Aug | Sep | Oct | Nov | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 1. | Bumblebee sp. | 0 | 0 | 20 | 2 | 0 | 22 | 22 | 0 | 13 ( 7 Sep) | 18 | 4 | 7 Sep | 3 Oct | ||||
| Species | Jul | Aug | Sep | Oct | Nov | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| Totals | 5246 | 0 | 8674 | 42943 | 6056 | 62919 | 62447 | 472 | 100 | 22 | ||||||||
| Observation hours | 3:05 | 0:00 | 30:15 | 34:30 | 9:33 | 77:23 | ||||||||||||
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