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Totals De Hoekse Sluis (Bergambacht) 2025
| Species | Mar | Apr | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 1. | Canada Goose | 6 | 5 | 11 | 0 | 11 | 4 ( 8 Mar) | 14 | 4 | 8 Mar | 5 Apr | ||||
| 2. | Barnacle Goose | 2550 | 2521 | 5071 | 38 | 5033 | 2098 (12 Apr) | 71 | 20 | 8 Mar | 26 Apr | ||||
| 3. | Greylag Goose | 77 | 172 | 249 | 0 | 249 | 48 ( 3 Apr) | 61 | 17 | 8 Mar | 27 Apr | ||||
| 4. | Pink-footed Goose | 2 | 0 | 2 | 0 | 2 | 2 (20 Mar) | 4 | 1 | 20 Mar | 20 Mar | ||||
| 5. | Eurasian White-fronted Goose | 2026 | 10 | 2036 | 0 | 2036 | 703 (19 Mar) | 36 | 10 | 8 Mar | 3 Apr | ||||
| 6. | Mute Swan | 7 | 44 | 51 | 0 | 51 | 18 (14 Apr) | 32 | 9 | 8 Mar | 26 Apr | ||||
| 7. | Egyptian Goose | 0 | 121 | 121 | 0 | 121 | 58 (12 Apr) | 18 | 5 | 3 Apr | 19 Apr | ||||
| 8. | Shelduck | 37 | 95 | 132 | 8 | 124 | 27 (12 Apr) | 68 | 19 | 10 Mar | 27 Apr | ||||
| 9. | Shoveler | 2 | 54 | 56 | 0 | 56 | 33 (12 Apr) | 21 | 6 | 8 Mar | 26 Apr | ||||
| 10. | Gadwall | 31 | 31 | 62 | 0 | 62 | 12 (13 Mar) | 54 | 15 | 8 Mar | 26 Apr | ||||
| 11. | Wigeon | 8868 | 98 | 8966 | 239 | 8727 | 3583 ( 8 Mar) | 43 | 12 | 8 Mar | 12 Apr | ||||
| 12. | Mallard | 2 | 12 | 14 | 0 | 14 | 6 (12 Apr) | 18 | 5 | 24 Mar | 19 Apr | ||||
| 13. | Teal | 0 | 2 | 2 | 0 | 2 | 2 ( 3 Apr) | 4 | 1 | 3 Apr | 3 Apr | ||||
| 14. | Red-crested Pochard | 0 | 4 | 4 | 0 | 4 | 4 (12 Apr) | 4 | 1 | 12 Apr | 12 Apr | ||||
| 15. | Tufted Duck | 4 | 29 | 33 | 7 | 26 | 10 (12 Apr) | 43 | 12 | 21 Mar | 26 Apr | ||||
| 16. | Goosander | 1 | 2 | 3 | 2 | 1 | 1 (21 Mar) | 11 | 3 | 21 Mar | 12 Apr | ||||
| 17. | Swift | 0 | 188 | 188 | 0 | 188 | 138 (26 Apr) | 14 | 4 | 12 Apr | 27 Apr | ||||
| 18. | Cuckoo | 0 | 3 | 3 | 0 | 3 | 2 (26 Apr) | 7 | 2 | 19 Apr | 26 Apr | ||||
| 19. | Stock Dove | 21 | 48 | 69 | 1 | 68 | 10 ( 3 Apr) | 68 | 19 | 8 Mar | 26 Apr | ||||
| 20. | Woodpigeon | 301 | 157 | 458 | 2 | 456 | 81 (19 Mar) | 89 | 25 | 8 Mar | 26 Apr | ||||
| 21. | Collared Dove | 8 | 2 | 10 | 0 | 10 | 4 (19 Mar) | 14 | 4 | 8 Mar | 3 Apr | ||||
| 22. | Great Crested Grebe | 2 | 5 | 7 | 1 | 6 | 4 (12 Apr) | 11 | 3 | 20 Mar | 27 Apr | ||||
| 23. | Oystercatcher | 45 | 97 | 142 | 17 | 125 | 18 (19 Apr) | 79 | 22 | 8 Mar | 26 Apr | ||||
| 24. | Avocet | 22 | 55 | 77 | 16 | 61 | 16 (22 Mar) | 50 | 14 | 20 Mar | 27 Apr | ||||
| 25. | Golden Plover | 23 | 0 | 23 | 0 | 23 | 23 ( 8 Mar) | 4 | 1 | 8 Mar | 8 Mar | ||||
| 26. | Ringed Plover | 1 | 0 | 1 | 0 | 1 | 1 (22 Mar) | 4 | 1 | 22 Mar | 22 Mar | ||||
| 27. | Little Ringed Plover | 4 | 21 | 25 | 0 | 25 | 6 ( 3 Apr) | 32 | 9 | 22 Mar | 26 Apr | ||||
| 28. | Lapwing | 16 | 20 | 36 | 0 | 36 | 13 ( 8 Mar) | 46 | 13 | 8 Mar | 26 Apr | ||||
| 29. | Whimbrel | 0 | 199 | 199 | 0 | 199 | 67 (19 Apr) | 43 | 12 | 3 Apr | 27 Apr | ||||
| 30. | Curlew | 113 | 13 | 126 | 1 | 125 | 105 (10 Mar) | 39 | 11 | 8 Mar | 19 Apr | ||||
| Species | Mar | Apr | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 31. | Bar-tailed Godwit | 0 | 1 | 1 | 0 | 1 | 1 ( 5 Apr) | 4 | 1 | 5 Apr | 5 Apr | ||||
| 32. | Black-tailed Godwit | 73 | 100 | 173 | 10 | 163 | 55 ( 3 Apr) | 68 | 19 | 8 Mar | 26 Apr | ||||
| 33. | Icelandic Black-tailed Godwit | 0 | 5 | 5 | 0 | 5 | 4 ( 3 Apr) | 7 | 2 | 3 Apr | 6 Apr | ||||
| 34. | Snipe | 6 | 15 | 21 | 3 | 18 | 9 ( 3 Apr) | 18 | 5 | 8 Mar | 12 Apr | ||||
| 35. | Common Sandpiper | 0 | 17 | 17 | 1 | 16 | 7 (26 Apr) | 21 | 6 | 12 Apr | 27 Apr | ||||
| 36. | Green Sandpiper | 6 | 98 | 104 | 0 | 104 | 26 ( 3 Apr) | 50 | 14 | 19 Mar | 19 Apr | ||||
| 37. | Wood Sandpiper | 0 | 5 | 5 | 0 | 5 | 4 (19 Apr) | 7 | 2 | 19 Apr | 26 Apr | ||||
| 38. | Redshank | 24 | 73 | 97 | 4 | 93 | 32 ( 3 Apr) | 64 | 18 | 8 Mar | 26 Apr | ||||
| 39. | Greenshank | 0 | 2 | 2 | 0 | 2 | 1 ( 6 Apr) | 7 | 2 | 6 Apr | 19 Apr | ||||
| 40. | Ruff | 9 | 0 | 9 | 0 | 9 | 4 (19 Mar) | 11 | 3 | 10 Mar | 19 Mar | ||||
| 41. | wader sp. | 19 | 15 | 34 | 0 | 34 | 18 ( 8 Mar) | 18 | 5 | 8 Mar | 19 Apr | ||||
| 42. | small wader | 2 | 1 | 3 | 0 | 3 | 2 (22 Mar) | 7 | 2 | 22 Mar | 5 Apr | ||||
| 43. | Dunlin | 3 | 3 | 6 | 0 | 6 | 3 (20 Mar) | 7 | 2 | 20 Mar | 3 Apr | ||||
| 44. | Caspian Tern | 0 | 4 | 4 | 0 | 4 | 2 (12 Apr) | 7 | 2 | 12 Apr | 19 Apr | ||||
| 45. | Black Tern | 0 | 62 | 62 | 0 | 62 | 48 (19 Apr) | 18 | 5 | 12 Apr | 27 Apr | ||||
| 46. | Common/Arctic Tern | 0 | 2 | 2 | 0 | 2 | 2 (19 Apr) | 4 | 1 | 19 Apr | 19 Apr | ||||
| 47. | Common Tern | 0 | 88 | 88 | 0 | 88 | 35 (12 Apr) | 29 | 8 | 3 Apr | 26 Apr | ||||
| 48. | Black-headed Gull | 576 | 1031 | 1607 | 9 | 1598 | 254 (19 Apr) | 93 | 26 | 8 Mar | 27 Apr | ||||
| 49. | Mediterranean Gull | 6 | 105 | 111 | 4 | 107 | 42 (19 Apr) | 43 | 12 | 8 Mar | 26 Apr | ||||
| 50. | Common Gull | 128 | 170 | 298 | 4 | 294 | 50 ( 3 Apr) | 89 | 25 | 8 Mar | 26 Apr | ||||
| 51. | Caspian Gull | 19 | 19 | 38 | 2 | 36 | 5 (10 Mar) | 61 | 17 | 8 Mar | 26 Apr | ||||
| 52. | Herring Gull | 12 | 30 | 42 | 2 | 40 | 8 (26 Apr) | 50 | 14 | 8 Mar | 26 Apr | ||||
| 53. | Yellow-legged Gull | 0 | 1 | 1 | 0 | 1 | 1 ( 3 Apr) | 4 | 1 | 3 Apr | 3 Apr | ||||
| 54. | Great Black-backed Gull | 3 | 2 | 5 | 0 | 5 | 1 ( 8 Mar) | 18 | 5 | 8 Mar | 4 Apr | ||||
| 55. | Lesser Black-backed Gull | 232 | 2142 | 2374 | 6 | 2368 | 434 (19 Apr) | 96 | 27 | 8 Mar | 27 Apr | ||||
| 56. | White Stork | 4 | 31 | 35 | 0 | 35 | 12 (19 Apr) | 43 | 12 | 13 Mar | 19 Apr | ||||
| 57. | Cormorant | 471 | 1115 | 1586 | 12 | 1574 | 390 ( 4 Apr) | 100 | 28 | 8 Mar | 27 Apr | ||||
| 58. | Spoonbill | 18 | 168 | 186 | 8 | 178 | 27 ( 7 Apr) | 82 | 23 | 10 Mar | 27 Apr | ||||
| 59. | Little Egret | 0 | 4 | 4 | 0 | 4 | 4 ( 6 Apr) | 4 | 1 | 6 Apr | 6 Apr | ||||
| 60. | Great White Egret | 7 | 51 | 58 | 6 | 52 | 10 ( 8 Apr) | 54 | 15 | 19 Mar | 26 Apr | ||||
| Species | Mar | Apr | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 61. | Grey Heron | 36 | 183 | 219 | 5 | 214 | 43 ( 7 Apr) | 79 | 22 | 8 Mar | 26 Apr | ||||
| 62. | Purple Heron | 0 | 79 | 79 | 2 | 77 | 26 (19 Apr) | 46 | 13 | 4 Apr | 27 Apr | ||||
| 63. | Osprey | 0 | 7 | 7 | 0 | 7 | 2 ( 4 Apr) | 18 | 5 | 3 Apr | 19 Apr | ||||
| 64. | Sparrowhawk | 19 | 72 | 91 | 4 | 87 | 18 (19 Apr) | 86 | 24 | 8 Mar | 26 Apr | ||||
| 65. | Marsh Harrier | 13 | 150 | 163 | 0 | 163 | 35 ( 5 Apr) | 75 | 21 | 10 Mar | 26 Apr | ||||
| 66. | Hen Harrier | 2 | 2 | 4 | 0 | 4 | 1 (20 Mar) | 14 | 4 | 20 Mar | 8 Apr | ||||
| 67. | Pallid Harrier | 0 | 1 | 1 | 0 | 1 | 1 ( 3 Apr) | 4 | 1 | 3 Apr | 3 Apr | ||||
| 68. | Red Kite | 0 | 5 | 5 | 0 | 5 | 2 ( 4 Apr) | 11 | 3 | 4 Apr | 12 Apr | ||||
| 69. | Black Kite | 0 | 2 | 2 | 1 | 1 | 1 (14 Apr) | 7 | 2 | 14 Apr | 15 Apr | ||||
| 70. | White-tailed Eagle | 0 | 10 | 10 | 6 | 4 | 4 (14 Apr) | 18 | 5 | 7 Apr | 19 Apr | ||||
| 71. | Common Buzzard | 36 | 30 | 66 | 0 | 66 | 21 (13 Mar) | 54 | 15 | 8 Mar | 20 Apr | ||||
| 72. | Hoopoe | 0 | 1 | 1 | 0 | 1 | 1 ( 7 Apr) | 4 | 1 | 7 Apr | 7 Apr | ||||
| 73. | Great Spotted Woodpecker | 5 | 7 | 12 | 1 | 11 | 3 (22 Mar) | 32 | 9 | 10 Mar | 26 Apr | ||||
| 74. | Kestrel | 0 | 28 | 28 | 1 | 27 | 11 (12 Apr) | 29 | 8 | 3 Apr | 19 Apr | ||||
| 75. | falcon sp. | 0 | 1 | 1 | 0 | 1 | 1 (19 Apr) | 4 | 1 | 19 Apr | 19 Apr | ||||
| 76. | Merlin | 0 | 8 | 8 | 0 | 8 | 2 ( 3 Apr) | 25 | 7 | 3 Apr | 19 Apr | ||||
| 77. | Hobby | 0 | 2 | 2 | 0 | 2 | 2 (19 Apr) | 4 | 1 | 19 Apr | 19 Apr | ||||
| 78. | Peregrine | 2 | 2 | 4 | 3 | 1 | 1 (16 Mar) | 14 | 4 | 16 Mar | 19 Apr | ||||
| 79. | Rose-ringed Parakeet | 14 | 18 | 32 | 0 | 32 | 8 (19 Apr) | 32 | 9 | 10 Mar | 26 Apr | ||||
| 80. | Jay | 0 | 8 | 8 | 3 | 5 | 2 (12 Apr) | 21 | 6 | 4 Apr | 19 Apr | ||||
| 81. | Magpie | 0 | 11 | 11 | 0 | 11 | 6 ( 7 Apr) | 11 | 3 | 7 Apr | 15 Apr | ||||
| 82. | Jackdaw | 16 | 41 | 57 | 0 | 57 | 31 (12 Apr) | 18 | 5 | 20 Mar | 26 Apr | ||||
| 83. | Rook | 8 | 20 | 28 | 8 | 20 | 5 ( 5 Apr) | 43 | 12 | 8 Mar | 19 Apr | ||||
| 84. | Carrion Crow | 4 | 15 | 19 | 0 | 19 | 8 (19 Apr) | 25 | 7 | 10 Mar | 26 Apr | ||||
| 85. | Raven | 0 | 2 | 2 | 0 | 2 | 2 (12 Apr) | 4 | 1 | 12 Apr | 12 Apr | ||||
| 86. | Blue Tit | 35 | 12 | 47 | 0 | 47 | 9 (20 Mar) | 50 | 14 | 8 Mar | 12 Apr | ||||
| 87. | Great Tit | 22 | 11 | 33 | 0 | 33 | 6 (21 Mar) | 54 | 15 | 8 Mar | 19 Apr | ||||
| 88. | Penduline Tit | 0 | 1 | 1 | 0 | 1 | 1 ( 4 Apr) | 4 | 1 | 4 Apr | 4 Apr | ||||
| 89. | Wood Lark | 0 | 3 | 3 | 0 | 3 | 3 ( 4 Apr) | 4 | 1 | 4 Apr | 4 Apr | ||||
| 90. | Skylark | 14 | 7 | 21 | 0 | 21 | 7 (31 Mar) | 18 | 5 | 8 Mar | 12 Apr | ||||
| Species | Mar | Apr | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 91. | Sand Martin | 2 | 155 | 157 | 0 | 157 | 43 (12 Apr) | 46 | 13 | 31 Mar | 27 Apr | ||||
| 92. | Swallow | 10 | 508 | 518 | 0 | 518 | 76 (12 Apr) | 64 | 18 | 27 Mar | 27 Apr | ||||
| 93. | House Martin | 3 | 19 | 22 | 0 | 22 | 5 (12 Apr) | 32 | 9 | 24 Mar | 26 Apr | ||||
| 94. | Willow Warbler | 0 | 1 | 1 | 0 | 1 | 1 ( 3 Apr) | 4 | 1 | 3 Apr | 3 Apr | ||||
| 95. | Chiffchaff | 7 | 20 | 27 | 1 | 26 | 6 (19 Apr) | 50 | 14 | 8 Mar | 26 Apr | ||||
| 96. | Chiffchaff/Willow Warbler | 0 | 2 | 2 | 0 | 2 | 1 ( 8 Apr) | 7 | 2 | 8 Apr | 15 Apr | ||||
| 97. | Blackcap | 0 | 1 | 1 | 0 | 1 | 1 (12 Apr) | 4 | 1 | 12 Apr | 12 Apr | ||||
| 98. | Firecrest | 0 | 1 | 1 | 0 | 1 | 1 (12 Apr) | 4 | 1 | 12 Apr | 12 Apr | ||||
| 99. | Starling | 1108 | 81 | 1189 | 0 | 1189 | 537 (13 Mar) | 75 | 21 | 8 Mar | 26 Apr | ||||
| 100. | Song Thrush | 10 | 43 | 53 | 1 | 52 | 20 (12 Apr) | 21 | 6 | 22 Mar | 19 Apr | ||||
| 101. | Mistle Thrush | 1 | 4 | 5 | 0 | 5 | 2 ( 3 Apr) | 14 | 4 | 19 Mar | 5 Apr | ||||
| 102. | Redwing | 2530 | 43 | 2573 | 0 | 2573 | 2485 (22 Mar) | 25 | 7 | 21 Mar | 7 Apr | ||||
| 103. | Blackbird | 2 | 6 | 8 | 0 | 8 | 2 (20 Apr) | 25 | 7 | 10 Mar | 20 Apr | ||||
| 104. | Fieldfare | 27 | 79 | 106 | 0 | 106 | 34 ( 4 Apr) | 29 | 8 | 22 Mar | 19 Apr | ||||
| 105. | Ring Ouzel | 0 | 3 | 3 | 0 | 3 | 2 (26 Apr) | 7 | 2 | 4 Apr | 26 Apr | ||||
| 106. | Tree Sparrow | 0 | 2 | 2 | 1 | 1 | 1 ( 3 Apr) | 7 | 2 | 3 Apr | 26 Apr | ||||
| 107. | Dunnock | 3 | 0 | 3 | 0 | 3 | 2 (10 Mar) | 7 | 2 | 8 Mar | 10 Mar | ||||
| 108. | Blue-headed Wagtail | 0 | 79 | 79 | 0 | 79 | 30 ( 7 Apr) | 29 | 8 | 3 Apr | 26 Apr | ||||
| 109. | Yellow wagtail sp. | 0 | 14 | 14 | 0 | 14 | 6 (12 Apr) | 11 | 3 | 8 Apr | 15 Apr | ||||
| 110. | Grey Wagtail | 1 | 0 | 1 | 0 | 1 | 1 (22 Mar) | 4 | 1 | 22 Mar | 22 Mar | ||||
| 111. | White Wagtail | 78 | 101 | 179 | 1 | 178 | 42 ( 3 Apr) | 75 | 21 | 8 Mar | 26 Apr | ||||
| 112. | alba wagtail sp. | 60 | 13 | 73 | 0 | 73 | 33 (22 Mar) | 43 | 12 | 10 Mar | 15 Apr | ||||
| 113. | Motacilla (wagtail) sp. | 0 | 1 | 1 | 0 | 1 | 1 ( 7 Apr) | 4 | 1 | 7 Apr | 7 Apr | ||||
| 114. | Pied Wagtail | 1 | 1 | 2 | 0 | 2 | 1 ( 8 Mar) | 7 | 2 | 8 Mar | 3 Apr | ||||
| 115. | Meadow Pipit | 18 | 6494 | 6512 | 0 | 6512 | 1562 (15 Apr) | 79 | 22 | 10 Mar | 27 Apr | ||||
| 116. | Tree Pipit | 0 | 24 | 24 | 0 | 24 | 6 (15 Apr) | 25 | 7 | 7 Apr | 26 Apr | ||||
| 117. | Water Pipit | 1 | 0 | 1 | 0 | 1 | 1 (10 Mar) | 4 | 1 | 10 Mar | 10 Mar | ||||
| 118. | Rock Pipit/Water Pipit | 1 | 1 | 2 | 0 | 2 | 1 (22 Mar) | 7 | 2 | 22 Mar | 12 Apr | ||||
| 119. | Chaffinch | 670 | 242 | 912 | 2 | 910 | 328 ( 8 Mar) | 89 | 25 | 8 Mar | 26 Apr | ||||
| 120. | Brambling | 3 | 1 | 4 | 0 | 4 | 3 ( 8 Mar) | 7 | 2 | 8 Mar | 15 Apr | ||||
| Species | Mar | Apr | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 121. | Hawfinch | 1 | 0 | 1 | 0 | 1 | 1 (22 Mar) | 4 | 1 | 22 Mar | 22 Mar | ||||
| 122. | Greenfinch | 18 | 20 | 38 | 3 | 35 | 5 (20 Mar) | 46 | 13 | 8 Mar | 26 Apr | ||||
| 123. | Linnet | 14 | 46 | 60 | 2 | 58 | 8 ( 4 Apr) | 68 | 19 | 19 Mar | 27 Apr | ||||
| 124. | Goldfinch | 16 | 23 | 39 | 0 | 39 | 5 (31 Mar) | 50 | 14 | 8 Mar | 26 Apr | ||||
| 125. | Siskin | 5 | 1 | 6 | 0 | 6 | 4 ( 8 Mar) | 11 | 3 | 8 Mar | 7 Apr | ||||
| 126. | Reed Bunting | 8 | 7 | 15 | 0 | 15 | 3 ( 3 Apr) | 32 | 9 | 8 Mar | 19 Apr | ||||
| 127. | passerine sp. | 2 | 1 | 3 | 0 | 3 | 1 (19 Mar) | 11 | 3 | 19 Mar | 4 Apr | ||||
| Other species | |||||||||||||||
| Species | Mar | Apr | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 1. | Small Tortoiseshell | 1 | 0 | 1 | 0 | 1 | 1 ( 8 Mar) | 4 | 1 | 8 Mar | 8 Mar | ||||
| 2. | Brimstone | 0 | 1 | 1 | 0 | 1 | 1 (19 Apr) | 4 | 1 | 19 Apr | 19 Apr | ||||
| 3. | European Peacock | 0 | 5 | 5 | 0 | 5 | 2 ( 3 Apr) | 11 | 3 | 3 Apr | 12 Apr | ||||
| 4. | white sp. (butterfly) | 0 | 1 | 1 | 0 | 1 | 1 (19 Apr) | 4 | 1 | 19 Apr | 19 Apr | ||||
| Other species | |||||||||||||||
| Species | Mar | Apr | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 1. | Bumblebee sp. | 1 | 7 | 8 | 0 | 8 | 3 (12 Apr) | 18 | 5 | 19 Mar | 26 Apr | ||||
| Species | Mar | Apr | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| Totals | 20615 | 18158 | 38773 | 448 | 38325 | 100 | 28 | ||||||||
| Observation hours | 37:59 | 85:36 | 123:35 | ||||||||||||
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