Also present
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) | 21 | 4 | 8 Mar | 5 Apr | ||||
| 2. | Barnacle Goose | 2550 | 254 | 2804 | 38 | 2766 | 1441 (22 Mar) | 79 | 15 | 8 Mar | 8 Apr | ||||
| 3. | Greylag Goose | 77 | 55 | 132 | 0 | 132 | 48 ( 3 Apr) | 47 | 9 | 8 Mar | 8 Apr | ||||
| 4. | Pink-footed Goose | 2 | 0 | 2 | 0 | 2 | 2 (20 Mar) | 5 | 1 | 20 Mar | 20 Mar | ||||
| 5. | Eurasian White-fronted Goose | 2026 | 10 | 2036 | 0 | 2036 | 703 (19 Mar) | 53 | 10 | 8 Mar | 3 Apr | ||||
| 6. | Mute Swan | 7 | 9 | 16 | 0 | 16 | 7 ( 6 Apr) | 26 | 5 | 8 Mar | 6 Apr | ||||
| 7. | Egyptian Goose | 0 | 21 | 21 | 0 | 21 | 21 ( 3 Apr) | 5 | 1 | 3 Apr | 3 Apr | ||||
| 8. | Shelduck | 37 | 22 | 59 | 0 | 59 | 12 (22 Mar) | 63 | 12 | 10 Mar | 7 Apr | ||||
| 9. | Shoveler | 2 | 7 | 9 | 0 | 9 | 7 ( 3 Apr) | 11 | 2 | 8 Mar | 3 Apr | ||||
| 10. | Gadwall | 31 | 12 | 43 | 0 | 43 | 12 (13 Mar) | 58 | 11 | 8 Mar | 8 Apr | ||||
| 11. | Wigeon | 8868 | 97 | 8965 | 239 | 8726 | 3583 ( 8 Mar) | 58 | 11 | 8 Mar | 4 Apr | ||||
| 12. | Mallard | 2 | 3 | 5 | 0 | 5 | 2 (24 Mar) | 16 | 3 | 24 Mar | 5 Apr | ||||
| 13. | Teal | 0 | 2 | 2 | 0 | 2 | 2 ( 3 Apr) | 5 | 1 | 3 Apr | 3 Apr | ||||
| 14. | Tufted Duck | 4 | 10 | 14 | 2 | 12 | 5 ( 5 Apr) | 32 | 6 | 21 Mar | 6 Apr | ||||
| 15. | Goosander | 1 | 1 | 2 | 1 | 1 | 1 (21 Mar) | 11 | 2 | 21 Mar | 3 Apr | ||||
| 16. | Stock Dove | 21 | 34 | 55 | 1 | 54 | 10 ( 3 Apr) | 79 | 15 | 8 Mar | 8 Apr | ||||
| 17. | Woodpigeon | 301 | 81 | 382 | 2 | 380 | 81 (19 Mar) | 95 | 18 | 8 Mar | 8 Apr | ||||
| 18. | Collared Dove | 8 | 2 | 10 | 0 | 10 | 4 (19 Mar) | 21 | 4 | 8 Mar | 3 Apr | ||||
| 19. | Great Crested Grebe | 2 | 0 | 2 | 0 | 2 | 2 (20 Mar) | 5 | 1 | 20 Mar | 20 Mar | ||||
| 20. | Oystercatcher | 45 | 29 | 74 | 8 | 66 | 9 ( 8 Mar) | 74 | 14 | 8 Mar | 7 Apr | ||||
| 21. | Avocet | 22 | 11 | 33 | 6 | 27 | 16 (22 Mar) | 37 | 7 | 20 Mar | 7 Apr | ||||
| 22. | Golden Plover | 23 | 0 | 23 | 0 | 23 | 23 ( 8 Mar) | 5 | 1 | 8 Mar | 8 Mar | ||||
| 23. | Ringed Plover | 1 | 0 | 1 | 0 | 1 | 1 (22 Mar) | 5 | 1 | 22 Mar | 22 Mar | ||||
| 24. | Little Ringed Plover | 4 | 15 | 19 | 0 | 19 | 6 ( 3 Apr) | 26 | 5 | 22 Mar | 8 Apr | ||||
| 25. | Lapwing | 16 | 12 | 28 | 0 | 28 | 13 ( 8 Mar) | 42 | 8 | 8 Mar | 8 Apr | ||||
| 26. | Whimbrel | 0 | 69 | 69 | 0 | 69 | 51 ( 5 Apr) | 26 | 5 | 3 Apr | 8 Apr | ||||
| 27. | Curlew | 113 | 6 | 119 | 1 | 118 | 105 (10 Mar) | 37 | 7 | 8 Mar | 5 Apr | ||||
| 28. | Bar-tailed Godwit | 0 | 1 | 1 | 0 | 1 | 1 ( 5 Apr) | 5 | 1 | 5 Apr | 5 Apr | ||||
| 29. | Black-tailed Godwit | 73 | 75 | 148 | 10 | 138 | 55 ( 3 Apr) | 74 | 14 | 8 Mar | 8 Apr | ||||
| 30. | Icelandic Black-tailed Godwit | 0 | 5 | 5 | 0 | 5 | 4 ( 3 Apr) | 11 | 2 | 3 Apr | 6 Apr | ||||
| Species | Mar | Apr | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 31. | Snipe | 6 | 10 | 16 | 3 | 13 | 9 ( 3 Apr) | 21 | 4 | 8 Mar | 6 Apr | ||||
| 32. | Green Sandpiper | 6 | 79 | 85 | 0 | 85 | 26 ( 3 Apr) | 53 | 10 | 19 Mar | 8 Apr | ||||
| 33. | Redshank | 24 | 53 | 77 | 4 | 73 | 32 ( 3 Apr) | 68 | 13 | 8 Mar | 8 Apr | ||||
| 34. | Greenshank | 0 | 1 | 1 | 0 | 1 | 1 ( 6 Apr) | 5 | 1 | 6 Apr | 6 Apr | ||||
| 35. | Ruff | 9 | 0 | 9 | 0 | 9 | 4 (19 Mar) | 16 | 3 | 10 Mar | 19 Mar | ||||
| 36. | wader sp. | 19 | 1 | 20 | 0 | 20 | 18 ( 8 Mar) | 16 | 3 | 8 Mar | 4 Apr | ||||
| 37. | small wader | 2 | 1 | 3 | 0 | 3 | 2 (22 Mar) | 11 | 2 | 22 Mar | 5 Apr | ||||
| 38. | Dunlin | 3 | 3 | 6 | 0 | 6 | 3 (20 Mar) | 11 | 2 | 20 Mar | 3 Apr | ||||
| 39. | Common Tern | 0 | 6 | 6 | 0 | 6 | 3 ( 8 Apr) | 16 | 3 | 3 Apr | 8 Apr | ||||
| 40. | Black-headed Gull | 576 | 219 | 795 | 9 | 786 | 167 (13 Mar) | 89 | 17 | 8 Mar | 8 Apr | ||||
| 41. | Mediterranean Gull | 6 | 4 | 10 | 4 | 6 | 2 (16 Mar) | 32 | 6 | 8 Mar | 4 Apr | ||||
| 42. | Common Gull | 128 | 71 | 199 | 4 | 195 | 50 ( 3 Apr) | 95 | 18 | 8 Mar | 8 Apr | ||||
| 43. | Caspian Gull | 19 | 2 | 21 | 2 | 19 | 5 (10 Mar) | 53 | 10 | 8 Mar | 4 Apr | ||||
| 44. | Herring Gull | 12 | 8 | 20 | 0 | 20 | 5 ( 3 Apr) | 47 | 9 | 8 Mar | 7 Apr | ||||
| 45. | Yellow-legged Gull | 0 | 1 | 1 | 0 | 1 | 1 ( 3 Apr) | 5 | 1 | 3 Apr | 3 Apr | ||||
| 46. | Great Black-backed Gull | 3 | 2 | 5 | 0 | 5 | 1 ( 8 Mar) | 26 | 5 | 8 Mar | 4 Apr | ||||
| 47. | Lesser Black-backed Gull | 232 | 725 | 957 | 6 | 951 | 185 ( 5 Apr) | 95 | 18 | 8 Mar | 8 Apr | ||||
| 48. | White Stork | 4 | 16 | 20 | 0 | 20 | 5 ( 5 Apr) | 42 | 8 | 13 Mar | 8 Apr | ||||
| 49. | Cormorant | 471 | 786 | 1257 | 9 | 1248 | 390 ( 4 Apr) | 100 | 19 | 8 Mar | 8 Apr | ||||
| 50. | Spoonbill | 18 | 75 | 93 | 3 | 90 | 27 ( 7 Apr) | 74 | 14 | 10 Mar | 7 Apr | ||||
| 51. | Little Egret | 0 | 4 | 4 | 0 | 4 | 4 ( 6 Apr) | 5 | 1 | 6 Apr | 6 Apr | ||||
| 52. | Great White Egret | 7 | 25 | 32 | 1 | 31 | 10 ( 8 Apr) | 42 | 8 | 19 Mar | 8 Apr | ||||
| 53. | Grey Heron | 36 | 108 | 144 | 1 | 143 | 43 ( 7 Apr) | 79 | 15 | 8 Mar | 8 Apr | ||||
| 54. | Purple Heron | 0 | 21 | 21 | 0 | 21 | 8 ( 7 Apr) | 21 | 4 | 4 Apr | 8 Apr | ||||
| 55. | Osprey | 0 | 4 | 4 | 0 | 4 | 2 ( 4 Apr) | 16 | 3 | 3 Apr | 8 Apr | ||||
| 56. | Sparrowhawk | 19 | 35 | 54 | 2 | 52 | 14 ( 5 Apr) | 84 | 16 | 8 Mar | 8 Apr | ||||
| 57. | Marsh Harrier | 13 | 98 | 111 | 0 | 111 | 35 ( 5 Apr) | 68 | 13 | 10 Mar | 8 Apr | ||||
| 58. | Hen Harrier | 2 | 2 | 4 | 0 | 4 | 1 (20 Mar) | 21 | 4 | 20 Mar | 8 Apr | ||||
| 59. | Pallid Harrier | 0 | 1 | 1 | 0 | 1 | 1 ( 3 Apr) | 5 | 1 | 3 Apr | 3 Apr | ||||
| 60. | Red Kite | 0 | 3 | 3 | 0 | 3 | 2 ( 4 Apr) | 11 | 2 | 4 Apr | 5 Apr | ||||
| Species | Mar | Apr | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 61. | White-tailed Eagle | 0 | 1 | 1 | 0 | 1 | 1 ( 7 Apr) | 5 | 1 | 7 Apr | 7 Apr | ||||
| 62. | Common Buzzard | 36 | 16 | 52 | 0 | 52 | 21 (13 Mar) | 53 | 10 | 8 Mar | 7 Apr | ||||
| 63. | Hoopoe | 0 | 1 | 1 | 0 | 1 | 1 ( 7 Apr) | 5 | 1 | 7 Apr | 7 Apr | ||||
| 64. | Great Spotted Woodpecker | 5 | 3 | 8 | 1 | 7 | 3 (22 Mar) | 26 | 5 | 10 Mar | 7 Apr | ||||
| 65. | Kestrel | 0 | 10 | 10 | 0 | 10 | 4 ( 5 Apr) | 26 | 5 | 3 Apr | 8 Apr | ||||
| 66. | Merlin | 0 | 6 | 6 | 0 | 6 | 2 ( 3 Apr) | 26 | 5 | 3 Apr | 8 Apr | ||||
| 67. | Peregrine | 2 | 1 | 3 | 3 | 0 | 1 (16 Mar) | 16 | 3 | 16 Mar | 6 Apr | ||||
| 68. | Rose-ringed Parakeet | 14 | 4 | 18 | 0 | 18 | 6 (10 Mar) | 37 | 7 | 10 Mar | 5 Apr | ||||
| 69. | Jay | 0 | 2 | 2 | 0 | 2 | 1 ( 4 Apr) | 11 | 2 | 4 Apr | 5 Apr | ||||
| 70. | Magpie | 0 | 6 | 6 | 0 | 6 | 6 ( 7 Apr) | 5 | 1 | 7 Apr | 7 Apr | ||||
| 71. | Jackdaw | 16 | 1 | 17 | 0 | 17 | 16 (20 Mar) | 11 | 2 | 20 Mar | 8 Apr | ||||
| 72. | Rook | 8 | 13 | 21 | 6 | 15 | 5 ( 5 Apr) | 47 | 9 | 8 Mar | 8 Apr | ||||
| 73. | Carrion Crow | 4 | 0 | 4 | 0 | 4 | 2 (10 Mar) | 11 | 2 | 10 Mar | 27 Mar | ||||
| 74. | Blue Tit | 35 | 10 | 45 | 0 | 45 | 9 (20 Mar) | 68 | 13 | 8 Mar | 7 Apr | ||||
| 75. | Great Tit | 22 | 4 | 26 | 0 | 26 | 6 (21 Mar) | 68 | 13 | 8 Mar | 5 Apr | ||||
| 76. | Penduline Tit | 0 | 1 | 1 | 0 | 1 | 1 ( 4 Apr) | 5 | 1 | 4 Apr | 4 Apr | ||||
| 77. | Wood Lark | 0 | 3 | 3 | 0 | 3 | 3 ( 4 Apr) | 5 | 1 | 4 Apr | 4 Apr | ||||
| 78. | Skylark | 14 | 5 | 19 | 0 | 19 | 7 (31 Mar) | 21 | 4 | 8 Mar | 4 Apr | ||||
| 79. | Sand Martin | 2 | 68 | 70 | 0 | 70 | 25 ( 3 Apr) | 32 | 6 | 31 Mar | 8 Apr | ||||
| 80. | Swallow | 10 | 208 | 218 | 0 | 218 | 75 ( 5 Apr) | 47 | 9 | 27 Mar | 8 Apr | ||||
| 81. | House Martin | 3 | 9 | 12 | 0 | 12 | 3 ( 5 Apr) | 32 | 6 | 24 Mar | 7 Apr | ||||
| 82. | Willow Warbler | 0 | 1 | 1 | 0 | 1 | 1 ( 3 Apr) | 5 | 1 | 3 Apr | 3 Apr | ||||
| 83. | Chiffchaff | 7 | 8 | 15 | 1 | 14 | 5 ( 7 Apr) | 47 | 9 | 8 Mar | 7 Apr | ||||
| 84. | Chiffchaff/Willow Warbler | 0 | 1 | 1 | 0 | 1 | 1 ( 8 Apr) | 5 | 1 | 8 Apr | 8 Apr | ||||
| 85. | Starling | 1108 | 33 | 1141 | 0 | 1141 | 537 (13 Mar) | 84 | 16 | 8 Mar | 8 Apr | ||||
| 86. | Song Thrush | 10 | 16 | 26 | 0 | 26 | 9 (22 Mar) | 21 | 4 | 22 Mar | 8 Apr | ||||
| 87. | Mistle Thrush | 1 | 4 | 5 | 0 | 5 | 2 ( 3 Apr) | 21 | 4 | 19 Mar | 5 Apr | ||||
| 88. | Redwing | 2530 | 43 | 2573 | 0 | 2573 | 2485 (22 Mar) | 37 | 7 | 21 Mar | 7 Apr | ||||
| 89. | Blackbird | 2 | 2 | 4 | 0 | 4 | 1 (10 Mar) | 21 | 4 | 10 Mar | 4 Apr | ||||
| 90. | Fieldfare | 27 | 54 | 81 | 0 | 81 | 34 ( 4 Apr) | 26 | 5 | 22 Mar | 8 Apr | ||||
| Species | Mar | Apr | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 91. | Ring Ouzel | 0 | 1 | 1 | 0 | 1 | 1 ( 4 Apr) | 5 | 1 | 4 Apr | 4 Apr | ||||
| 92. | Tree Sparrow | 0 | 1 | 1 | 0 | 1 | 1 ( 3 Apr) | 5 | 1 | 3 Apr | 3 Apr | ||||
| 93. | Dunnock | 3 | 0 | 3 | 0 | 3 | 2 (10 Mar) | 11 | 2 | 8 Mar | 10 Mar | ||||
| 94. | Blue-headed Wagtail | 0 | 37 | 37 | 0 | 37 | 30 ( 7 Apr) | 21 | 4 | 3 Apr | 7 Apr | ||||
| 95. | Yellow wagtail sp. | 0 | 3 | 3 | 0 | 3 | 3 ( 8 Apr) | 5 | 1 | 8 Apr | 8 Apr | ||||
| 96. | Grey Wagtail | 1 | 0 | 1 | 0 | 1 | 1 (22 Mar) | 5 | 1 | 22 Mar | 22 Mar | ||||
| 97. | White Wagtail | 78 | 82 | 160 | 1 | 159 | 42 ( 3 Apr) | 84 | 16 | 8 Mar | 7 Apr | ||||
| 98. | alba wagtail sp. | 60 | 7 | 67 | 0 | 67 | 33 (22 Mar) | 47 | 9 | 10 Mar | 8 Apr | ||||
| 99. | Motacilla (wagtail) sp. | 0 | 1 | 1 | 0 | 1 | 1 ( 7 Apr) | 5 | 1 | 7 Apr | 7 Apr | ||||
| 100. | Pied Wagtail | 1 | 1 | 2 | 0 | 2 | 1 ( 8 Mar) | 11 | 2 | 8 Mar | 3 Apr | ||||
| 101. | Meadow Pipit | 18 | 2721 | 2739 | 0 | 2739 | 929 ( 7 Apr) | 68 | 13 | 10 Mar | 8 Apr | ||||
| 102. | Tree Pipit | 0 | 5 | 5 | 0 | 5 | 4 ( 7 Apr) | 11 | 2 | 7 Apr | 8 Apr | ||||
| 103. | Water Pipit | 1 | 0 | 1 | 0 | 1 | 1 (10 Mar) | 5 | 1 | 10 Mar | 10 Mar | ||||
| 104. | Rock Pipit/Water Pipit | 1 | 0 | 1 | 0 | 1 | 1 (22 Mar) | 5 | 1 | 22 Mar | 22 Mar | ||||
| 105. | Chaffinch | 670 | 199 | 869 | 2 | 867 | 328 ( 8 Mar) | 95 | 18 | 8 Mar | 8 Apr | ||||
| 106. | Brambling | 3 | 0 | 3 | 0 | 3 | 3 ( 8 Mar) | 5 | 1 | 8 Mar | 8 Mar | ||||
| 107. | Hawfinch | 1 | 0 | 1 | 0 | 1 | 1 (22 Mar) | 5 | 1 | 22 Mar | 22 Mar | ||||
| 108. | Greenfinch | 18 | 16 | 34 | 3 | 31 | 5 (20 Mar) | 53 | 10 | 8 Mar | 5 Apr | ||||
| 109. | Linnet | 14 | 24 | 38 | 2 | 36 | 8 ( 4 Apr) | 58 | 11 | 19 Mar | 8 Apr | ||||
| 110. | Goldfinch | 16 | 9 | 25 | 0 | 25 | 5 (31 Mar) | 47 | 9 | 8 Mar | 7 Apr | ||||
| 111. | Siskin | 5 | 1 | 6 | 0 | 6 | 4 ( 8 Mar) | 16 | 3 | 8 Mar | 7 Apr | ||||
| 112. | Reed Bunting | 8 | 5 | 13 | 0 | 13 | 3 ( 3 Apr) | 37 | 7 | 8 Mar | 7 Apr | ||||
| 113. | passerine sp. | 2 | 1 | 3 | 0 | 3 | 1 (19 Mar) | 16 | 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) | 5 | 1 | 8 Mar | 8 Mar | ||||
| 2. | European Peacock | 0 | 2 | 2 | 0 | 2 | 2 ( 3 Apr) | 5 | 1 | 3 Apr | 3 Apr | ||||
| Other species | |||||||||||||||
| Species | Mar | Apr | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 1. | Bumblebee sp. | 1 | 2 | 3 | 0 | 3 | 2 ( 3 Apr) | 11 | 2 | 19 Mar | 3 Apr | ||||
| Species | Mar | Apr | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| Totals | 20615 | 6864 | 27479 | 375 | 27104 | 100 | 19 | ||||||||
| Observation hours | 37:59 | 37:43 | 75:42 | ||||||||||||
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