Also present
Totals Hoogekampse Plas, De Bilt 2025
| Species | Feb | Mar | Apr | May | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 1. | Barnacle Goose | 618 | 181 | 226 | 75 | 1100 | 356 | 744 | 252 (15 Feb) | 47 | 18 | 15 Feb | 9 May | ||||
| 2. | Greylag Goose | 90 | 208 | 128 | 257 | 683 | 104 | 579 | 137 (12 May) | 84 | 32 | 6 Feb | 13 May | ||||
| 3. | Anser sp. | 35 | 142 | 0 | 0 | 177 | 0 | 177 | 100 ( 5 Mar) | 8 | 3 | 15 Feb | 7 Mar | ||||
| 4. | goose sp. | 0 | 23 | 8 | 0 | 31 | 0 | 31 | 12 ( 8 Mar) | 8 | 3 | 8 Mar | 2 Apr | ||||
| 5. | Tundra Bean Goose | 113 | 0 | 0 | 0 | 113 | 18 | 95 | 50 (21 Feb) | 11 | 4 | 6 Feb | 28 Feb | ||||
| 6. | Eurasian White-fronted Goose | 2277 | 6002 | 1 | 0 | 8280 | 776 | 7504 | 4624 (20 Mar) | 32 | 12 | 6 Feb | 23 Apr | ||||
| 7. | Shelduck | 1 | 3 | 10 | 0 | 14 | 2 | 12 | 4 (20 Apr) | 18 | 7 | 6 Feb | 30 Apr | ||||
| 8. | Ruddy Shelduck | 0 | 0 | 2 | 0 | 2 | 0 | 2 | 2 ( 6 Apr) | 3 | 1 | 6 Apr | 6 Apr | ||||
| 9. | Shoveler | 0 | 0 | 2 | 0 | 2 | 0 | 2 | 2 (23 Apr) | 3 | 1 | 23 Apr | 23 Apr | ||||
| 10. | Gadwall | 4 | 1 | 3 | 0 | 8 | 0 | 8 | 4 (21 Feb) | 13 | 5 | 21 Feb | 30 Apr | ||||
| 11. | Wigeon | 0 | 134 | 0 | 0 | 134 | 0 | 134 | 130 ( 8 Mar) | 5 | 2 | 8 Mar | 29 Mar | ||||
| 12. | Mallard | 0 | 3 | 4 | 0 | 7 | 0 | 7 | 3 ( 7 Mar) | 8 | 3 | 7 Mar | 10 Apr | ||||
| 13. | Teal | 0 | 0 | 2 | 0 | 2 | 0 | 2 | 2 (16 Apr) | 3 | 1 | 16 Apr | 16 Apr | ||||
| 14. | duck sp. | 22 | 0 | 0 | 0 | 22 | 0 | 22 | 22 (21 Feb) | 3 | 1 | 21 Feb | 21 Feb | ||||
| 15. | Tufted Duck | 0 | 0 | 2 | 0 | 2 | 0 | 2 | 2 (30 Apr) | 3 | 1 | 30 Apr | 30 Apr | ||||
| 16. | Goosander | 0 | 1 | 0 | 0 | 1 | 1 | 0 | 1 ( 8 Mar) | 3 | 1 | 8 Mar | 8 Mar | ||||
| 17. | Swift | 0 | 0 | 317 | 561 | 878 | 0 | 878 | 175 (13 May) | 37 | 14 | 5 Apr | 13 May | ||||
| 18. | Cuckoo | 0 | 0 | 3 | 2 | 5 | 0 | 5 | 1 ( 9 Apr) | 13 | 5 | 9 Apr | 13 May | ||||
| 19. | Stock Dove | 6 | 12 | 23 | 22 | 63 | 3 | 60 | 9 ( 9 May) | 63 | 24 | 8 Feb | 12 May | ||||
| 20. | Woodpigeon | 7 | 272 | 89 | 3 | 371 | 0 | 371 | 146 (19 Mar) | 61 | 23 | 15 Feb | 12 May | ||||
| 21. | Collared Dove | 0 | 5 | 2 | 9 | 16 | 5 | 11 | 5 ( 9 May) | 21 | 8 | 9 Mar | 9 May | ||||
| 22. | Crane | 0 | 8 | 0 | 0 | 8 | 0 | 8 | 7 (19 Mar) | 5 | 2 | 7 Mar | 19 Mar | ||||
| 23. | Great Crested Grebe | 0 | 0 | 3 | 0 | 3 | 3 | 0 | 2 (27 Apr) | 5 | 2 | 23 Apr | 27 Apr | ||||
| 24. | Oystercatcher | 2 | 2 | 3 | 0 | 7 | 0 | 7 | 2 (28 Feb) | 16 | 6 | 28 Feb | 6 Apr | ||||
| 25. | Golden Plover | 285 | 55 | 0 | 0 | 340 | 0 | 340 | 285 (21 Feb) | 16 | 6 | 21 Feb | 21 Mar | ||||
| 26. | Little Ringed Plover | 0 | 12 | 15 | 5 | 32 | 2 | 30 | 4 (19 Mar) | 47 | 18 | 15 Mar | 8 May | ||||
| 27. | Lapwing | 1315 | 59 | 29 | 4 | 1407 | 7 | 1400 | 615 (21 Feb) | 63 | 24 | 6 Feb | 12 May | ||||
| 28. | Whimbrel | 0 | 0 | 79 | 3 | 82 | 0 | 82 | 65 ( 5 Apr) | 18 | 7 | 5 Apr | 3 May | ||||
| 29. | Curlew | 3 | 3 | 1 | 0 | 7 | 6 | 1 | 3 (21 Feb) | 8 | 3 | 21 Feb | 9 Apr | ||||
| 30. | Black-tailed Godwit | 0 | 16 | 5 | 0 | 21 | 14 | 7 | 13 (20 Mar) | 21 | 8 | 5 Mar | 11 Apr | ||||
| Species | Feb | Mar | Apr | May | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 31. | Snipe | 0 | 2 | 8 | 0 | 10 | 1 | 9 | 6 (23 Apr) | 13 | 5 | 5 Mar | 23 Apr | ||||
| 32. | Common Sandpiper | 0 | 0 | 0 | 5 | 5 | 0 | 5 | 4 (12 May) | 5 | 2 | 9 May | 12 May | ||||
| 33. | Green Sandpiper | 0 | 7 | 43 | 0 | 50 | 1 | 49 | 14 ( 3 Apr) | 42 | 16 | 5 Mar | 26 Apr | ||||
| 34. | Wood Sandpiper | 0 | 0 | 1 | 1 | 2 | 0 | 2 | 1 (23 Apr) | 5 | 2 | 23 Apr | 2 May | ||||
| 35. | Redshank | 0 | 36 | 25 | 0 | 61 | 2 | 59 | 11 (20 Mar) | 47 | 18 | 5 Mar | 23 Apr | ||||
| 36. | Greenshank | 0 | 0 | 2 | 1 | 3 | 1 | 2 | 1 (23 Apr) | 8 | 3 | 23 Apr | 2 May | ||||
| 37. | wader sp. | 0 | 0 | 4 | 4 | 8 | 0 | 8 | 4 (12 May) | 8 | 3 | 3 Apr | 12 May | ||||
| 38. | Black Tern | 0 | 0 | 0 | 3 | 3 | 0 | 3 | 3 ( 5 May) | 3 | 1 | 5 May | 5 May | ||||
| 39. | Common Tern | 0 | 0 | 6 | 15 | 21 | 0 | 21 | 5 (12 May) | 16 | 6 | 20 Apr | 13 May | ||||
| 40. | Little Gull | 0 | 2 | 0 | 0 | 2 | 0 | 2 | 2 (29 Mar) | 3 | 1 | 29 Mar | 29 Mar | ||||
| 41. | Black-headed Gull | 171 | 452 | 353 | 176 | 1152 | 7 | 1145 | 197 ( 7 Mar) | 74 | 28 | 15 Feb | 13 May | ||||
| 42. | Mediterranean Gull | 0 | 7 | 9 | 0 | 16 | 1 | 15 | 6 (16 Apr) | 16 | 6 | 5 Mar | 16 Apr | ||||
| 43. | Common Gull | 16 | 59 | 35 | 1 | 111 | 1 | 110 | 32 ( 7 Mar) | 39 | 15 | 15 Feb | 5 May | ||||
| 44. | Caspian Gull | 1 | 2 | 5 | 2 | 10 | 0 | 10 | 2 ( 6 Apr) | 21 | 8 | 21 Feb | 13 May | ||||
| 45. | Herring Gull | 5 | 8 | 5 | 2 | 20 | 0 | 20 | 5 (21 Feb) | 29 | 11 | 21 Feb | 13 May | ||||
| 46. | Yellow-legged Gull | 0 | 1 | 0 | 0 | 1 | 0 | 1 | 1 (15 Mar) | 3 | 1 | 15 Mar | 15 Mar | ||||
| 47. | Lesser Black-backed Gull | 13 | 66 | 139 | 95 | 313 | 0 | 313 | 33 (20 Apr) | 76 | 29 | 21 Feb | 13 May | ||||
| 48. | large gull sp. | 0 | 3 | 3 | 0 | 6 | 3 | 3 | 3 (30 Apr) | 8 | 3 | 7 Mar | 30 Apr | ||||
| 49. | White Stork | 5 | 7 | 25 | 12 | 49 | 3 | 46 | 13 ( 6 Apr) | 26 | 10 | 21 Feb | 13 May | ||||
| 50. | Cormorant | 18 | 908 | 576 | 14 | 1516 | 19 | 1497 | 650 (19 Mar) | 87 | 33 | 15 Feb | 13 May | ||||
| 51. | Spoonbill | 1 | 4 | 8 | 4 | 17 | 2 | 15 | 4 (29 Mar) | 26 | 10 | 21 Feb | 13 May | ||||
| 52. | Great White Egret | 1 | 12 | 10 | 5 | 28 | 0 | 28 | 5 ( 7 Mar) | 32 | 12 | 21 Feb | 13 May | ||||
| 53. | Grey Heron | 2 | 23 | 38 | 5 | 68 | 3 | 65 | 12 ( 4 Apr) | 66 | 25 | 15 Feb | 13 May | ||||
| 54. | Purple Heron | 0 | 1 | 7 | 2 | 10 | 4 | 6 | 3 (27 Apr) | 18 | 7 | 7 Mar | 12 May | ||||
| 55. | Osprey | 0 | 0 | 1 | 1 | 2 | 0 | 2 | 1 (30 Apr) | 5 | 2 | 30 Apr | 2 May | ||||
| 56. | Honey Buzzard | 0 | 0 | 0 | 6 | 6 | 0 | 6 | 3 (12 May) | 5 | 2 | 12 May | 13 May | ||||
| 57. | Sparrowhawk | 1 | 9 | 29 | 2 | 41 | 0 | 41 | 6 (10 Apr) | 53 | 20 | 21 Feb | 9 May | ||||
| 58. | Marsh Harrier | 0 | 7 | 37 | 9 | 53 | 1 | 52 | 13 ( 6 Apr) | 42 | 16 | 19 Mar | 13 May | ||||
| 59. | Hen Harrier | 0 | 1 | 0 | 1 | 2 | 0 | 2 | 1 (19 Mar) | 5 | 2 | 19 Mar | 12 May | ||||
| 60. | Montagu's Harrier | 0 | 0 | 1 | 0 | 1 | 0 | 1 | 1 (27 Apr) | 3 | 1 | 27 Apr | 27 Apr | ||||
| Species | Feb | Mar | Apr | May | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 61. | Red Kite | 0 | 0 | 0 | 3 | 3 | 0 | 3 | 2 ( 2 May) | 5 | 2 | 2 May | 12 May | ||||
| 62. | Black Kite | 0 | 0 | 0 | 3 | 3 | 0 | 3 | 2 (12 May) | 5 | 2 | 12 May | 13 May | ||||
| 63. | White-tailed Eagle | 0 | 0 | 0 | 1 | 1 | 0 | 1 | 1 ( 2 May) | 3 | 1 | 2 May | 2 May | ||||
| 64. | Common Buzzard | 1 | 6 | 7 | 1 | 15 | 0 | 15 | 4 (19 Mar) | 24 | 9 | 21 Feb | 9 May | ||||
| 65. | Short-eared Owl | 0 | 0 | 1 | 0 | 1 | 0 | 1 | 1 (11 Apr) | 3 | 1 | 11 Apr | 11 Apr | ||||
| 66. | Great Spotted Woodpecker | 1 | 4 | 2 | 1 | 8 | 0 | 8 | 2 (28 Mar) | 18 | 7 | 21 Feb | 13 May | ||||
| 67. | Kestrel | 0 | 1 | 27 | 4 | 32 | 0 | 32 | 8 ( 6 Apr) | 34 | 13 | 19 Mar | 12 May | ||||
| 68. | Merlin | 0 | 0 | 7 | 0 | 7 | 0 | 7 | 1 ( 3 Apr) | 18 | 7 | 3 Apr | 30 Apr | ||||
| 69. | Hobby | 0 | 0 | 1 | 3 | 4 | 0 | 4 | 2 ( 2 May) | 8 | 3 | 23 Apr | 12 May | ||||
| 70. | Peregrine | 1 | 0 | 0 | 0 | 1 | 0 | 1 | 1 (21 Feb) | 3 | 1 | 21 Feb | 21 Feb | ||||
| 71. | Yellow-crowned Amazon | 0 | 1 | 0 | 0 | 1 | 0 | 1 | 1 ( 8 Mar) | 3 | 1 | 8 Mar | 8 Mar | ||||
| 72. | Jay | 2 | 7 | 2 | 3 | 14 | 1 | 13 | 4 (29 Mar) | 13 | 5 | 15 Feb | 8 May | ||||
| 73. | Magpie | 0 | 9 | 5 | 0 | 14 | 0 | 14 | 9 (29 Mar) | 11 | 4 | 29 Mar | 23 Apr | ||||
| 74. | Jackdaw | 6 | 55 | 8 | 0 | 69 | 0 | 69 | 22 (19 Mar) | 29 | 11 | 21 Feb | 2 Apr | ||||
| 75. | Rook | 0 | 2 | 0 | 0 | 2 | 0 | 2 | 2 (21 Mar) | 3 | 1 | 21 Mar | 21 Mar | ||||
| 76. | Carrion Crow | 0 | 0 | 1 | 0 | 1 | 0 | 1 | 1 (23 Apr) | 3 | 1 | 23 Apr | 23 Apr | ||||
| 77. | Raven | 0 | 0 | 0 | 2 | 2 | 0 | 2 | 2 ( 8 May) | 3 | 1 | 8 May | 8 May | ||||
| 78. | Marsh Tit | 0 | 1 | 0 | 0 | 1 | 0 | 1 | 1 ( 8 Mar) | 3 | 1 | 8 Mar | 8 Mar | ||||
| 79. | Blue Tit | 0 | 20 | 2 | 0 | 22 | 0 | 22 | 6 (29 Mar) | 24 | 9 | 7 Mar | 3 Apr | ||||
| 80. | Great Tit | 0 | 1 | 1 | 0 | 2 | 0 | 2 | 1 (20 Mar) | 5 | 2 | 20 Mar | 3 Apr | ||||
| 81. | Wood Lark | 2 | 4 | 1 | 0 | 7 | 1 | 6 | 2 (21 Feb) | 13 | 5 | 21 Feb | 11 Apr | ||||
| 82. | Skylark | 19 | 18 | 2 | 0 | 39 | 3 | 36 | 17 (21 Feb) | 26 | 10 | 6 Feb | 12 Apr | ||||
| 83. | Sand Martin | 0 | 3 | 106 | 10 | 119 | 1 | 118 | 30 ( 6 Apr) | 53 | 20 | 21 Mar | 13 May | ||||
| 84. | Swallow | 0 | 35 | 650 | 161 | 846 | 1 | 845 | 135 ( 6 Apr) | 66 | 25 | 19 Mar | 13 May | ||||
| 85. | House Martin | 0 | 2 | 56 | 1 | 59 | 0 | 59 | 20 ( 6 Apr) | 32 | 12 | 28 Mar | 9 May | ||||
| 86. | Long-tailed Tit | 2 | 0 | 3 | 0 | 5 | 0 | 5 | 2 (21 Feb) | 8 | 3 | 21 Feb | 23 Apr | ||||
| 87. | Chiffchaff | 0 | 6 | 4 | 0 | 10 | 0 | 10 | 3 (20 Mar) | 16 | 6 | 9 Mar | 23 Apr | ||||
| 88. | Chiffchaff/Willow Warbler | 0 | 0 | 0 | 1 | 1 | 0 | 1 | 1 ( 9 May) | 3 | 1 | 9 May | 9 May | ||||
| 89. | Whitethroat | 0 | 0 | 0 | 1 | 1 | 0 | 1 | 1 ( 9 May) | 3 | 1 | 9 May | 9 May | ||||
| 90. | Short-toed Tree Creeper | 0 | 0 | 2 | 0 | 2 | 0 | 2 | 2 (10 Apr) | 3 | 1 | 10 Apr | 10 Apr | ||||
| Species | Feb | Mar | Apr | May | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 91. | Starling | 36 | 1488 | 66 | 5 | 1595 | 1 | 1594 | 986 (21 Mar) | 61 | 23 | 6 Feb | 9 May | ||||
| 92. | Song Thrush | 0 | 2 | 14 | 0 | 16 | 0 | 16 | 4 (23 Apr) | 21 | 8 | 8 Mar | 26 Apr | ||||
| 93. | Redwing | 62 | 759 | 225 | 0 | 1046 | 0 | 1046 | 421 (29 Mar) | 50 | 19 | 21 Feb | 12 Apr | ||||
| 94. | Blackbird | 0 | 0 | 3 | 0 | 3 | 0 | 3 | 2 ( 6 Apr) | 5 | 2 | 6 Apr | 11 Apr | ||||
| 95. | Fieldfare | 12 | 127 | 92 | 0 | 231 | 6 | 225 | 41 ( 8 Mar) | 45 | 17 | 8 Feb | 12 Apr | ||||
| 96. | Ring Ouzel | 0 | 2 | 5 | 0 | 7 | 0 | 7 | 5 ( 3 Apr) | 5 | 2 | 29 Mar | 3 Apr | ||||
| 97. | thrush sp. | 0 | 0 | 5 | 0 | 5 | 0 | 5 | 3 ( 5 Apr) | 5 | 2 | 4 Apr | 5 Apr | ||||
| 98. | Stonechat | 0 | 0 | 0 | 1 | 1 | 0 | 1 | 1 ( 3 May) | 3 | 1 | 3 May | 3 May | ||||
| 99. | Wheatear | 0 | 0 | 0 | 1 | 1 | 0 | 1 | 1 ( 2 May) | 3 | 1 | 2 May | 2 May | ||||
| 100. | Dunnock | 0 | 1 | 0 | 0 | 1 | 0 | 1 | 1 ( 7 Mar) | 3 | 1 | 7 Mar | 7 Mar | ||||
| 101. | Blue-headed Wagtail | 0 | 0 | 54 | 1 | 55 | 1 | 54 | 12 ( 6 Apr) | 32 | 12 | 3 Apr | 8 May | ||||
| 102. | Yellow wagtail sp. | 0 | 0 | 6 | 33 | 39 | 0 | 39 | 31 (13 May) | 13 | 5 | 4 Apr | 13 May | ||||
| 103. | White Wagtail | 8 | 150 | 86 | 3 | 247 | 5 | 242 | 41 (21 Mar) | 79 | 30 | 15 Feb | 9 May | ||||
| 104. | Meadow Pipit | 15 | 88 | 1561 | 17 | 1681 | 0 | 1681 | 285 ( 5 Apr) | 79 | 30 | 21 Feb | 12 May | ||||
| 105. | Tree Pipit | 0 | 0 | 11 | 6 | 17 | 0 | 17 | 4 ( 9 May) | 26 | 10 | 3 Apr | 9 May | ||||
| 106. | Water Pipit | 1 | 0 | 1 | 0 | 2 | 0 | 2 | 1 ( 6 Feb) | 5 | 2 | 6 Feb | 2 Apr | ||||
| 107. | pipit sp. | 0 | 1 | 0 | 0 | 1 | 0 | 1 | 1 ( 9 Mar) | 3 | 1 | 9 Mar | 9 Mar | ||||
| 108. | Chaffinch | 19 | 1606 | 46 | 5 | 1676 | 9 | 1667 | 672 ( 8 Mar) | 63 | 24 | 15 Feb | 12 May | ||||
| 109. | Brambling | 2 | 2 | 0 | 0 | 4 | 1 | 3 | 1 ( 8 Feb) | 11 | 4 | 8 Feb | 21 Mar | ||||
| 110. | Hawfinch | 2 | 6 | 12 | 6 | 26 | 3 | 23 | 3 (23 Apr) | 42 | 16 | 8 Feb | 13 May | ||||
| 111. | Bullfinch | 0 | 0 | 2 | 0 | 2 | 0 | 2 | 2 (20 Apr) | 3 | 1 | 20 Apr | 20 Apr | ||||
| 112. | Greenfinch | 4 | 14 | 23 | 2 | 43 | 0 | 43 | 9 ( 3 Apr) | 45 | 17 | 15 Feb | 5 May | ||||
| 113. | Linnet | 0 | 17 | 27 | 0 | 44 | 2 | 42 | 7 ( 2 Apr) | 32 | 12 | 8 Mar | 12 Apr | ||||
| 114. | redpoll sp. | 1 | 0 | 0 | 0 | 1 | 0 | 1 | 1 ( 6 Feb) | 3 | 1 | 6 Feb | 6 Feb | ||||
| 115. | Goldfinch | 17 | 94 | 54 | 6 | 171 | 2 | 169 | 28 (19 Mar) | 68 | 26 | 8 Feb | 13 May | ||||
| 116. | Siskin | 50 | 1 | 0 | 0 | 51 | 7 | 44 | 29 ( 6 Feb) | 16 | 6 | 6 Feb | 15 Mar | ||||
| 117. | Reed Bunting | 0 | 32 | 24 | 5 | 61 | 3 | 58 | 8 (19 Mar) | 45 | 17 | 5 Mar | 13 May | ||||
| 118. | passerine sp. | 0 | 0 | 1 | 0 | 1 | 0 | 1 | 1 ( 3 Apr) | 3 | 1 | 3 Apr | 3 Apr | ||||
| Other species | |||||||||||||||||
| Species | Feb | Mar | Apr | May | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 1. | European Peacock | 1 | 1 | 0 | 0 | 2 | 1 | 1 | 1 (21 Feb) | 5 | 2 | 21 Feb | 21 Mar | ||||
| 2. | Swallowtail | 0 | 0 | 0 | 1 | 1 | 0 | 1 | 1 ( 2 May) | 3 | 1 | 2 May | 2 May | ||||
| 3. | Comma | 0 | 1 | 0 | 0 | 1 | 0 | 1 | 1 (21 Mar) | 3 | 1 | 21 Mar | 21 Mar | ||||
| Other species | |||||||||||||||||
| Species | Feb | Mar | Apr | May | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 1. | Bumblebee sp. | 0 | 4 | 0 | 0 | 4 | 0 | 4 | 4 (19 Mar) | 3 | 1 | 19 Mar | 19 Mar | ||||
| Species | Feb | Mar | Apr | May | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| Totals | 5276 | 13330 | 5533 | 1594 | 25733 | 1394 | 24339 | 100 | 38 | ||||||||
| Observation hours | 17:00 | 44:45 | 76:51 | 31:54 | 170:30 | ||||||||||||
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