Also present
Totals Willemstad 2025
| Species | Feb | Mar | Apr | May | Totals | SW | NE | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 1. | Canada Goose | 0 | 13 | 0 | 351 | 364 | 0 | 364 | 351 (24 May) | 18 | 4 | 9 Mar | 24 May | ||||
| 2. | Barnacle Goose | 347 | 169 | 54 | 28 | 598 | 0 | 598 | 205 (27 Feb) | 77 | 17 | 8 Feb | 24 May | ||||
| 3. | Greylag Goose | 32 | 37 | 44 | 84 | 197 | 8 | 189 | 39 (10 May) | 64 | 14 | 27 Feb | 24 May | ||||
| 4. | Tundra Bean Goose | 2 | 21 | 0 | 0 | 23 | 0 | 23 | 21 ( 8 Mar) | 9 | 2 | 19 Feb | 8 Mar | ||||
| 5. | Eurasian White-fronted Goose | 259 | 246 | 0 | 0 | 505 | 0 | 505 | 224 (27 Feb) | 32 | 7 | 8 Feb | 23 Mar | ||||
| 6. | Mute Swan | 0 | 3 | 0 | 12 | 15 | 0 | 15 | 7 (19 May) | 14 | 3 | 15 Mar | 24 May | ||||
| 7. | Egyptian Goose | 1 | 27 | 38 | 14 | 80 | 9 | 71 | 13 (19 Apr) | 50 | 11 | 27 Feb | 24 May | ||||
| 8. | Shelduck | 1 | 11 | 12 | 5 | 29 | 4 | 25 | 5 (22 Mar) | 45 | 10 | 27 Feb | 24 May | ||||
| 9. | Shoveler | 0 | 8 | 4 | 0 | 12 | 0 | 12 | 8 (22 Mar) | 14 | 3 | 22 Mar | 8 Apr | ||||
| 10. | Gadwall | 10 | 6 | 10 | 31 | 57 | 9 | 48 | 12 (10 May) | 50 | 11 | 8 Feb | 24 May | ||||
| 11. | Wigeon | 2 | 59 | 0 | 0 | 61 | 0 | 61 | 59 (22 Mar) | 9 | 2 | 16 Feb | 22 Mar | ||||
| 12. | Mallard | 0 | 6 | 11 | 7 | 24 | 0 | 24 | 7 (19 Apr) | 32 | 7 | 8 Mar | 24 May | ||||
| 13. | Teal | 0 | 8 | 0 | 0 | 8 | 0 | 8 | 8 ( 8 Mar) | 5 | 1 | 8 Mar | 8 Mar | ||||
| 14. | Pochard | 0 | 0 | 4 | 0 | 4 | 0 | 4 | 2 (15 Apr) | 9 | 2 | 15 Apr | 29 Apr | ||||
| 15. | Tufted Duck | 2 | 27 | 8 | 18 | 55 | 19 | 36 | 14 (22 Mar) | 45 | 10 | 16 Feb | 24 May | ||||
| 16. | Goldeneye | 0 | 3 | 0 | 0 | 3 | 0 | 3 | 2 ( 9 Mar) | 9 | 2 | 8 Mar | 9 Mar | ||||
| 17. | Goosander | 0 | 2 | 1 | 0 | 3 | 0 | 3 | 1 (15 Mar) | 14 | 3 | 15 Mar | 2 Apr | ||||
| 18. | Red-breasted Merganser | 0 | 16 | 19 | 8 | 43 | 0 | 43 | 8 ( 2 Apr) | 50 | 11 | 6 Mar | 19 May | ||||
| 19. | Swift | 0 | 0 | 727 | 2274 | 3001 | 0 | 3001 | 1267 (10 May) | 32 | 7 | 15 Apr | 24 May | ||||
| 20. | Cuckoo | 0 | 0 | 6 | 3 | 9 | 1 | 8 | 3 (26 Apr) | 18 | 4 | 15 Apr | 10 May | ||||
| 21. | Stock Dove | 16 | 41 | 36 | 2 | 95 | 1 | 94 | 11 (19 Apr) | 73 | 16 | 8 Feb | 10 May | ||||
| 22. | Woodpigeon | 131 | 874 | 355 | 18 | 1378 | 198 | 1180 | 249 ( 6 Mar) | 95 | 21 | 16 Feb | 24 May | ||||
| 23. | Collared Dove | 0 | 0 | 1 | 0 | 1 | 0 | 1 | 1 (29 Apr) | 5 | 1 | 29 Apr | 29 Apr | ||||
| 24. | Great Crested Grebe | 0 | 1 | 2 | 2 | 5 | 3 | 2 | 2 (19 Apr) | 18 | 4 | 6 Mar | 24 May | ||||
| 25. | Oystercatcher | 0 | 1 | 53 | 17 | 71 | 3 | 68 | 28 ( 8 Apr) | 45 | 10 | 8 Mar | 24 May | ||||
| 26. | Avocet | 0 | 2 | 0 | 0 | 2 | 0 | 2 | 2 ( 9 Mar) | 5 | 1 | 9 Mar | 9 Mar | ||||
| 27. | Golden Plover | 12 | 176 | 0 | 0 | 188 | 0 | 188 | 75 ( 8 Mar) | 27 | 6 | 27 Feb | 23 Mar | ||||
| 28. | Ringed Plover | 0 | 3 | 0 | 0 | 3 | 0 | 3 | 3 ( 8 Mar) | 5 | 1 | 8 Mar | 8 Mar | ||||
| 29. | Little Ringed Plover | 0 | 14 | 10 | 0 | 24 | 0 | 24 | 8 (22 Mar) | 32 | 7 | 6 Mar | 15 Apr | ||||
| 30. | Lapwing | 363 | 98 | 5 | 16 | 482 | 0 | 482 | 214 (16 Feb) | 59 | 13 | 8 Feb | 19 May | ||||
| Species | Feb | Mar | Apr | May | Totals | SW | NE | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 31. | Whimbrel | 0 | 1 | 32 | 0 | 33 | 0 | 33 | 11 (26 Apr) | 32 | 7 | 6 Mar | 29 Apr | ||||
| 32. | Curlew | 4 | 37 | 10 | 2 | 53 | 32 | 21 | 22 (22 Mar) | 50 | 11 | 8 Feb | 10 May | ||||
| 33. | Black-tailed Godwit | 82 | 42 | 27 | 0 | 151 | 0 | 151 | 82 (16 Feb) | 27 | 6 | 16 Feb | 6 Apr | ||||
| 34. | Snipe | 2 | 32 | 13 | 0 | 47 | 5 | 42 | 25 (22 Mar) | 36 | 8 | 19 Feb | 19 Apr | ||||
| 35. | Common Sandpiper | 0 | 0 | 1 | 0 | 1 | 0 | 1 | 1 (29 Apr) | 5 | 1 | 29 Apr | 29 Apr | ||||
| 36. | Green Sandpiper | 0 | 8 | 92 | 0 | 100 | 0 | 100 | 51 ( 6 Apr) | 36 | 8 | 8 Mar | 26 Apr | ||||
| 37. | Redshank | 0 | 18 | 6 | 3 | 27 | 0 | 27 | 8 ( 8 Mar) | 32 | 7 | 6 Mar | 19 May | ||||
| 38. | Greenshank | 0 | 0 | 11 | 0 | 11 | 0 | 11 | 11 (26 Apr) | 5 | 1 | 26 Apr | 26 Apr | ||||
| 39. | Ruff | 0 | 21 | 15 | 0 | 36 | 8 | 28 | 20 (23 Mar) | 27 | 6 | 9 Mar | 26 Apr | ||||
| 40. | Common Tern | 0 | 0 | 6 | 13 | 19 | 1 | 18 | 5 (19 May) | 23 | 5 | 26 Apr | 19 May | ||||
| 41. | Little Gull | 0 | 0 | 2 | 0 | 2 | 0 | 2 | 2 (26 Apr) | 5 | 1 | 26 Apr | 26 Apr | ||||
| 42. | Black-headed Gull | 93 | 1034 | 17 | 9 | 1153 | 0 | 1153 | 540 (23 Mar) | 68 | 15 | 19 Feb | 19 May | ||||
| 43. | Mediterranean Gull | 0 | 10 | 23 | 4 | 37 | 0 | 37 | 11 (19 Apr) | 41 | 9 | 6 Mar | 10 May | ||||
| 44. | Common Gull | 22 | 110 | 61 | 7 | 200 | 11 | 189 | 30 ( 9 Mar) | 91 | 20 | 8 Feb | 24 May | ||||
| 45. | Caspian Gull | 6 | 9 | 2 | 0 | 17 | 0 | 17 | 4 ( 9 Mar) | 36 | 8 | 8 Feb | 6 Apr | ||||
| 46. | Herring Gull | 95 | 95 | 76 | 13 | 279 | 1 | 278 | 61 (16 Feb) | 91 | 20 | 8 Feb | 19 May | ||||
| 47. | Yellow-legged Gull | 0 | 2 | 0 | 0 | 2 | 0 | 2 | 1 (22 Mar) | 9 | 2 | 22 Mar | 23 Mar | ||||
| 48. | Great Black-backed Gull | 9 | 21 | 26 | 0 | 56 | 0 | 56 | 9 ( 2 Apr) | 64 | 14 | 8 Feb | 26 Apr | ||||
| 49. | Lesser Black-backed Gull | 32 | 412 | 1300 | 413 | 2157 | 0 | 2157 | 362 (19 Apr) | 100 | 22 | 8 Feb | 24 May | ||||
| 50. | White Stork | 0 | 6 | 5 | 2 | 13 | 0 | 13 | 6 (22 Mar) | 18 | 4 | 22 Mar | 10 May | ||||
| 51. | Cormorant | 14 | 275 | 282 | 107 | 678 | 0 | 678 | 171 ( 8 Apr) | 86 | 19 | 27 Feb | 24 May | ||||
| 52. | Spoonbill | 0 | 5 | 24 | 8 | 37 | 0 | 37 | 8 ( 6 Apr) | 59 | 13 | 6 Mar | 19 May | ||||
| 53. | Little Egret | 0 | 0 | 5 | 7 | 12 | 0 | 12 | 4 ( 9 May) | 27 | 6 | 8 Apr | 24 May | ||||
| 54. | Cattle Egret | 0 | 0 | 3 | 1 | 4 | 0 | 4 | 3 (19 Apr) | 9 | 2 | 19 Apr | 10 May | ||||
| 55. | Great White Egret | 1 | 7 | 13 | 3 | 24 | 3 | 21 | 8 ( 8 Apr) | 45 | 10 | 27 Feb | 24 May | ||||
| 56. | Grey Heron | 0 | 39 | 34 | 9 | 82 | 2 | 80 | 15 ( 8 Apr) | 64 | 14 | 6 Mar | 24 May | ||||
| 57. | Purple Heron | 0 | 0 | 20 | 2 | 22 | 0 | 22 | 12 ( 8 Apr) | 27 | 6 | 6 Apr | 10 May | ||||
| 58. | Osprey | 0 | 0 | 1 | 0 | 1 | 0 | 1 | 1 (19 Apr) | 5 | 1 | 19 Apr | 19 Apr | ||||
| 59. | Honey Buzzard | 0 | 0 | 0 | 1 | 1 | 0 | 1 | 1 (10 May) | 5 | 1 | 10 May | 10 May | ||||
| 60. | Sparrowhawk | 0 | 7 | 10 | 4 | 21 | 0 | 21 | 4 (23 Mar) | 41 | 9 | 6 Mar | 10 May | ||||
| Species | Feb | Mar | Apr | May | Totals | SW | NE | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 61. | Marsh Harrier | 0 | 2 | 62 | 15 | 79 | 2 | 77 | 39 ( 8 Apr) | 50 | 11 | 6 Mar | 24 May | ||||
| 62. | Hen Harrier | 0 | 0 | 5 | 0 | 5 | 0 | 5 | 3 (15 Apr) | 9 | 2 | 8 Apr | 15 Apr | ||||
| 63. | Hen/Montagu's/Pallid Harrier | 0 | 0 | 0 | 1 | 1 | 0 | 1 | 1 (10 May) | 5 | 1 | 10 May | 10 May | ||||
| 64. | Red Kite | 1 | 0 | 1 | 0 | 2 | 1 | 1 | 1 (27 Feb) | 9 | 2 | 27 Feb | 15 Apr | ||||
| 65. | Black Kite | 0 | 0 | 0 | 1 | 1 | 0 | 1 | 1 (19 May) | 5 | 1 | 19 May | 19 May | ||||
| 66. | White-tailed Eagle | 0 | 1 | 0 | 0 | 1 | 0 | 1 | 1 (23 Mar) | 5 | 1 | 23 Mar | 23 Mar | ||||
| 67. | Common Buzzard | 1 | 12 | 5 | 0 | 18 | 2 | 16 | 5 ( 6 Mar) | 36 | 8 | 27 Feb | 29 Apr | ||||
| 68. | Short-eared Owl | 0 | 1 | 0 | 0 | 1 | 0 | 1 | 1 (23 Mar) | 5 | 1 | 23 Mar | 23 Mar | ||||
| 69. | European Bee-eater | 0 | 0 | 0 | 1 | 1 | 0 | 1 | 1 ( 9 May) | 5 | 1 | 9 May | 9 May | ||||
| 70. | Great Spotted Woodpecker | 2 | 2 | 5 | 0 | 9 | 0 | 9 | 2 ( 2 Apr) | 32 | 7 | 8 Feb | 8 Apr | ||||
| 71. | Kestrel | 0 | 3 | 14 | 0 | 17 | 0 | 17 | 8 ( 8 Apr) | 27 | 6 | 22 Mar | 15 Apr | ||||
| 72. | Merlin | 0 | 1 | 4 | 2 | 7 | 0 | 7 | 2 (15 Apr) | 27 | 6 | 9 Mar | 10 May | ||||
| 73. | Hobby | 0 | 0 | 0 | 1 | 1 | 0 | 1 | 1 (10 May) | 5 | 1 | 10 May | 10 May | ||||
| 74. | Peregrine | 0 | 1 | 0 | 0 | 1 | 0 | 1 | 1 (22 Mar) | 5 | 1 | 22 Mar | 22 Mar | ||||
| 75. | Jay | 1 | 1 | 3 | 0 | 5 | 0 | 5 | 2 ( 6 Apr) | 18 | 4 | 27 Feb | 6 Apr | ||||
| 76. | Jackdaw | 188 | 933 | 215 | 39 | 1375 | 6 | 1369 | 313 ( 8 Mar) | 82 | 18 | 19 Feb | 19 May | ||||
| 77. | Rook | 2 | 2 | 0 | 0 | 4 | 0 | 4 | 2 (27 Feb) | 9 | 2 | 27 Feb | 6 Mar | ||||
| 78. | Carrion Crow | 5 | 131 | 20 | 2 | 158 | 0 | 158 | 55 ( 9 Mar) | 68 | 15 | 16 Feb | 10 May | ||||
| 79. | Blue Tit | 2 | 24 | 8 | 2 | 36 | 0 | 36 | 10 ( 6 Mar) | 36 | 8 | 19 Feb | 19 May | ||||
| 80. | Great Tit | 2 | 8 | 4 | 0 | 14 | 0 | 14 | 6 ( 6 Mar) | 27 | 6 | 19 Feb | 6 Apr | ||||
| 81. | Wood Lark | 0 | 11 | 0 | 0 | 11 | 0 | 11 | 6 ( 9 Mar) | 14 | 3 | 6 Mar | 22 Mar | ||||
| 82. | Skylark | 15 | 55 | 3 | 0 | 73 | 0 | 73 | 20 ( 8 Mar) | 41 | 9 | 16 Feb | 8 Apr | ||||
| 83. | Sand Martin | 0 | 0 | 136 | 14 | 150 | 0 | 150 | 52 (26 Apr) | 50 | 11 | 1 Apr | 19 May | ||||
| 84. | Swallow | 0 | 5 | 395 | 453 | 853 | 0 | 853 | 351 (10 May) | 55 | 12 | 15 Mar | 24 May | ||||
| 85. | House Martin | 0 | 0 | 51 | 33 | 84 | 0 | 84 | 20 (19 Apr) | 36 | 8 | 6 Apr | 19 May | ||||
| 86. | Long-tailed Tit | 0 | 2 | 0 | 0 | 2 | 0 | 2 | 2 ( 8 Mar) | 5 | 1 | 8 Mar | 8 Mar | ||||
| 87. | Willow Warbler | 0 | 0 | 0 | 1 | 1 | 0 | 1 | 1 ( 9 May) | 5 | 1 | 9 May | 9 May | ||||
| 88. | Chiffchaff | 0 | 8 | 5 | 0 | 13 | 0 | 13 | 3 (23 Mar) | 36 | 8 | 6 Mar | 8 Apr | ||||
| 89. | Blackcap | 0 | 0 | 0 | 1 | 1 | 0 | 1 | 1 (10 May) | 5 | 1 | 10 May | 10 May | ||||
| 90. | Short-toed Tree Creeper | 0 | 2 | 0 | 0 | 2 | 0 | 2 | 2 ( 6 Mar) | 5 | 1 | 6 Mar | 6 Mar | ||||
| Species | Feb | Mar | Apr | May | Totals | SW | NE | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 91. | Starling | 0 | 5069 | 33 | 3 | 5105 | 0 | 5105 | 2742 (22 Mar) | 50 | 11 | 6 Mar | 10 May | ||||
| 92. | Song Thrush | 0 | 14 | 10 | 0 | 24 | 0 | 24 | 11 (22 Mar) | 18 | 4 | 22 Mar | 15 Apr | ||||
| 93. | Mistle Thrush | 0 | 9 | 2 | 0 | 11 | 0 | 11 | 7 (22 Mar) | 18 | 4 | 8 Mar | 6 Apr | ||||
| 94. | Redwing | 0 | 208 | 46 | 0 | 254 | 0 | 254 | 148 (22 Mar) | 18 | 4 | 22 Mar | 15 Apr | ||||
| 95. | Fieldfare | 5 | 41 | 89 | 0 | 135 | 0 | 135 | 82 ( 8 Apr) | 32 | 7 | 19 Feb | 19 Apr | ||||
| 96. | Ring Ouzel | 0 | 0 | 1 | 0 | 1 | 0 | 1 | 1 ( 6 Apr) | 5 | 1 | 6 Apr | 6 Apr | ||||
| 97. | Spotted Flycatcher | 0 | 0 | 0 | 1 | 1 | 0 | 1 | 1 (10 May) | 5 | 1 | 10 May | 10 May | ||||
| 98. | Stonechat | 0 | 0 | 1 | 0 | 1 | 0 | 1 | 1 ( 8 Apr) | 5 | 1 | 8 Apr | 8 Apr | ||||
| 99. | Tree Sparrow | 0 | 1 | 0 | 0 | 1 | 0 | 1 | 1 ( 6 Mar) | 5 | 1 | 6 Mar | 6 Mar | ||||
| 100. | Blue-headed Wagtail | 0 | 4 | 234 | 46 | 284 | 0 | 284 | 92 ( 8 Apr) | 50 | 11 | 22 Mar | 10 May | ||||
| 101. | Grey-headed Wagtail | 0 | 0 | 0 | 20 | 20 | 0 | 20 | 12 (10 May) | 9 | 2 | 9 May | 10 May | ||||
| 102. | Yellow wagtail sp. | 0 | 1 | 275 | 133 | 409 | 0 | 409 | 108 (10 May) | 50 | 11 | 23 Mar | 19 May | ||||
| 103. | Grey Wagtail | 0 | 5 | 0 | 0 | 5 | 0 | 5 | 2 ( 8 Mar) | 14 | 3 | 8 Mar | 22 Mar | ||||
| 104. | White Wagtail | 2 | 221 | 38 | 0 | 261 | 0 | 261 | 97 (22 Mar) | 50 | 11 | 27 Feb | 19 Apr | ||||
| 105. | alba wagtail sp. | 0 | 148 | 16 | 0 | 164 | 0 | 164 | 83 (22 Mar) | 32 | 7 | 8 Mar | 6 Apr | ||||
| 106. | Pied Wagtail | 0 | 3 | 0 | 0 | 3 | 0 | 3 | 2 (22 Mar) | 9 | 2 | 9 Mar | 22 Mar | ||||
| 107. | Meadow Pipit | 7 | 164 | 7653 | 5 | 7829 | 0 | 7829 | 3001 (15 Apr) | 73 | 16 | 27 Feb | 10 May | ||||
| 108. | Tree Pipit | 0 | 0 | 7 | 10 | 17 | 0 | 17 | 8 (10 May) | 23 | 5 | 8 Apr | 10 May | ||||
| 109. | Water Pipit | 1 | 1 | 0 | 0 | 2 | 0 | 2 | 1 (16 Feb) | 9 | 2 | 16 Feb | 15 Mar | ||||
| 110. | Chaffinch | 1 | 1158 | 148 | 5 | 1312 | 0 | 1312 | 482 ( 8 Mar) | 73 | 16 | 27 Feb | 19 May | ||||
| 111. | Brambling | 0 | 13 | 1 | 0 | 14 | 0 | 14 | 5 ( 8 Mar) | 23 | 5 | 6 Mar | 1 Apr | ||||
| 112. | Hawfinch | 0 | 4 | 7 | 2 | 13 | 0 | 13 | 4 ( 2 Apr) | 27 | 6 | 6 Mar | 10 May | ||||
| 113. | Greenfinch | 0 | 18 | 22 | 10 | 50 | 0 | 50 | 8 ( 2 Apr) | 59 | 13 | 6 Mar | 19 May | ||||
| 114. | Linnet | 0 | 46 | 136 | 20 | 202 | 0 | 202 | 27 ( 8 Apr) | 68 | 15 | 6 Mar | 19 May | ||||
| 115. | Goldfinch | 0 | 27 | 23 | 13 | 63 | 0 | 63 | 12 (22 Mar) | 55 | 12 | 6 Mar | 24 May | ||||
| 116. | Siskin | 0 | 12 | 3 | 2 | 17 | 0 | 17 | 8 ( 6 Mar) | 32 | 7 | 6 Mar | 10 May | ||||
| 117. | Reed Bunting | 2 | 66 | 8 | 0 | 76 | 0 | 76 | 24 (22 Mar) | 45 | 10 | 19 Feb | 6 Apr | ||||
| Other species | |||||||||||||||||
| Species | Feb | Mar | Apr | May | Totals | SW | NE | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 1. | Small Tortoiseshell | 0 | 4 | 2 | 1 | 7 | 0 | 7 | 3 ( 9 Mar) | 18 | 4 | 9 Mar | 10 May | ||||
| 2. | European Peacock | 0 | 6 | 5 | 0 | 11 | 0 | 11 | 3 (22 Mar) | 27 | 6 | 22 Mar | 19 Apr | ||||
| 3. | Speckled Wood | 0 | 0 | 1 | 0 | 1 | 0 | 1 | 1 ( 8 Apr) | 5 | 1 | 8 Apr | 8 Apr | ||||
| 4. | white sp. (butterfly) | 0 | 1 | 10 | 0 | 11 | 1 | 10 | 3 ( 8 Apr) | 23 | 5 | 22 Mar | 19 Apr | ||||
| 5. | Red Admiral | 0 | 0 | 0 | 1 | 1 | 0 | 1 | 1 ( 9 May) | 5 | 1 | 9 May | 9 May | ||||
| Other species | |||||||||||||||||
| Species | Feb | Mar | Apr | May | Totals | SW | NE | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 1. | Darter unknown | 0 | 0 | 0 | 2 | 2 | 0 | 2 | 2 (10 May) | 5 | 1 | 10 May | 10 May | ||||
| Other species | |||||||||||||||||
| Species | Feb | Mar | Apr | May | Totals | SW | NE | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 1. | Bumblebee sp. | 0 | 34 | 59 | 11 | 104 | 0 | 104 | 19 (19 Apr) | 68 | 15 | 6 Mar | 10 May | ||||
| Species | Feb | Mar | Apr | May | Totals | SW | NE | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| Totals | 1775 | 12546 | 13283 | 4349 | 31953 | 330 | 31623 | 100 | 22 | ||||||||
| Observation hours | 11:15 | 27:31 | 39:30 | 20:00 | 98:16 | ||||||||||||
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