Also present
Totals Berkheide (Katwijk) 2025
| Species | Feb | Mar | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 1. | Dark-bellied Brent Goose | 0 | 11 | 11 | 0 | 11 | 11 (20 Mar) | 6 | 1 | 20 Mar | 20 Mar | ||||
| 2. | Canada Goose | 6 | 87 | 93 | 53 | 40 | 33 ( 2 Mar) | 56 | 9 | 25 Feb | 21 Mar | ||||
| 3. | Barnacle Goose | 0 | 1627 | 1627 | 221 | 1406 | 1126 (20 Mar) | 63 | 10 | 2 Mar | 23 Mar | ||||
| 4. | Greylag Goose | 22 | 418 | 440 | 157 | 283 | 92 ( 8 Mar) | 94 | 15 | 17 Feb | 23 Mar | ||||
| 5. | goose sp. | 1200 | 1019 | 2219 | 19 | 2200 | 1200 (17 Feb) | 25 | 4 | 17 Feb | 19 Mar | ||||
| 6. | Pink-footed Goose | 0 | 7 | 7 | 0 | 7 | 7 (20 Mar) | 6 | 1 | 20 Mar | 20 Mar | ||||
| 7. | Tundra Bean Goose | 0 | 3 | 3 | 0 | 3 | 3 (20 Mar) | 6 | 1 | 20 Mar | 20 Mar | ||||
| 8. | Eurasian White-fronted Goose | 6 | 3 | 9 | 0 | 9 | 6 (17 Feb) | 13 | 2 | 17 Feb | 7 Mar | ||||
| 9. | Egyptian Goose | 0 | 123 | 123 | 18 | 105 | 34 ( 8 Mar) | 38 | 6 | 2 Mar | 21 Mar | ||||
| 10. | Shelduck | 0 | 26 | 26 | 5 | 21 | 14 (20 Mar) | 31 | 5 | 8 Mar | 22 Mar | ||||
| 11. | Shoveler | 0 | 181 | 181 | 37 | 144 | 141 ( 8 Mar) | 31 | 5 | 8 Mar | 22 Mar | ||||
| 12. | Gadwall | 0 | 8 | 8 | 4 | 4 | 4 ( 8 Mar) | 19 | 3 | 8 Mar | 21 Mar | ||||
| 13. | Wigeon | 0 | 44 | 44 | 30 | 14 | 30 ( 2 Mar) | 19 | 3 | 2 Mar | 20 Mar | ||||
| 14. | Mallard | 0 | 3 | 3 | 0 | 3 | 3 (19 Mar) | 6 | 1 | 19 Mar | 19 Mar | ||||
| 15. | Pintail | 0 | 17 | 17 | 0 | 17 | 8 ( 8 Mar) | 19 | 3 | 8 Mar | 22 Mar | ||||
| 16. | Teal | 0 | 15 | 15 | 0 | 15 | 15 ( 8 Mar) | 6 | 1 | 8 Mar | 8 Mar | ||||
| 17. | Eider | 0 | 41 | 41 | 26 | 15 | 18 (21 Mar) | 38 | 6 | 2 Mar | 21 Mar | ||||
| 18. | Common Scoter | 0 | 30 | 30 | 11 | 19 | 13 (17 Mar) | 38 | 6 | 2 Mar | 21 Mar | ||||
| 19. | Goldeneye | 0 | 4 | 4 | 2 | 2 | 4 ( 9 Mar) | 6 | 1 | 9 Mar | 9 Mar | ||||
| 20. | Goosander | 2 | 12 | 14 | 7 | 7 | 6 ( 8 Mar) | 31 | 5 | 17 Feb | 22 Mar | ||||
| 21. | Red-breasted Merganser | 0 | 1 | 1 | 1 | 0 | 1 (21 Mar) | 6 | 1 | 21 Mar | 21 Mar | ||||
| 22. | Stock Dove | 6 | 37 | 43 | 4 | 39 | 11 ( 6 Mar) | 75 | 12 | 17 Feb | 23 Mar | ||||
| 23. | Woodpigeon | 2 | 2923 | 2925 | 331 | 2594 | 1352 (19 Mar) | 88 | 14 | 25 Feb | 23 Mar | ||||
| 24. | Collared Dove | 0 | 4 | 4 | 2 | 2 | 1 ( 5 Mar) | 25 | 4 | 5 Mar | 20 Mar | ||||
| 25. | Great Crested Grebe | 0 | 9 | 9 | 4 | 5 | 5 ( 8 Mar) | 19 | 3 | 7 Mar | 19 Mar | ||||
| 26. | Oystercatcher | 0 | 13 | 13 | 7 | 6 | 6 ( 8 Mar) | 19 | 3 | 2 Mar | 21 Mar | ||||
| 27. | Avocet | 0 | 38 | 38 | 0 | 38 | 21 ( 8 Mar) | 25 | 4 | 8 Mar | 21 Mar | ||||
| 28. | Golden Plover | 0 | 2 | 2 | 0 | 2 | 1 ( 8 Mar) | 13 | 2 | 8 Mar | 21 Mar | ||||
| 29. | Ringed Plover | 0 | 6 | 6 | 0 | 6 | 6 (21 Mar) | 6 | 1 | 21 Mar | 21 Mar | ||||
| 30. | Little Ringed Plover | 0 | 2 | 2 | 0 | 2 | 2 (22 Mar) | 6 | 1 | 22 Mar | 22 Mar | ||||
| Species | Feb | Mar | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 31. | Lapwing | 5 | 23 | 28 | 14 | 14 | 9 ( 8 Mar) | 56 | 9 | 26 Feb | 21 Mar | ||||
| 32. | Curlew | 0 | 6 | 6 | 0 | 6 | 5 (20 Mar) | 13 | 2 | 9 Mar | 20 Mar | ||||
| 33. | Black-tailed Godwit | 0 | 1 | 1 | 0 | 1 | 1 (21 Mar) | 6 | 1 | 21 Mar | 21 Mar | ||||
| 34. | Snipe | 1 | 8 | 9 | 0 | 9 | 3 ( 9 Mar) | 31 | 5 | 17 Feb | 21 Mar | ||||
| 35. | Green Sandpiper | 0 | 2 | 2 | 1 | 1 | 1 (19 Mar) | 13 | 2 | 19 Mar | 21 Mar | ||||
| 36. | Redshank | 0 | 9 | 9 | 0 | 9 | 5 (21 Mar) | 25 | 4 | 8 Mar | 21 Mar | ||||
| 37. | Little Gull | 0 | 3 | 3 | 0 | 3 | 3 (17 Mar) | 6 | 1 | 17 Mar | 17 Mar | ||||
| 38. | Black-headed Gull | 0 | 940 | 940 | 11 | 929 | 280 (20 Mar) | 56 | 9 | 2 Mar | 22 Mar | ||||
| 39. | Common Gull | 0 | 498 | 498 | 2 | 496 | 193 (22 Mar) | 56 | 9 | 2 Mar | 22 Mar | ||||
| 40. | Herring Gull | 16 | 911 | 927 | 54 | 873 | 521 ( 2 Mar) | 69 | 11 | 26 Feb | 22 Mar | ||||
| 41. | Great Black-backed Gull | 0 | 4 | 4 | 1 | 3 | 1 ( 7 Mar) | 25 | 4 | 7 Mar | 22 Mar | ||||
| 42. | Lesser Black-backed Gull | 13 | 1787 | 1800 | 49 | 1751 | 429 (20 Mar) | 94 | 15 | 17 Feb | 23 Mar | ||||
| 43. | Red-throated Diver | 5 | 4 | 9 | 4 | 5 | 5 (26 Feb) | 19 | 3 | 26 Feb | 21 Mar | ||||
| 44. | diver sp. | 0 | 1 | 1 | 0 | 1 | 1 (20 Mar) | 6 | 1 | 20 Mar | 20 Mar | ||||
| 45. | Gannet | 0 | 49 | 49 | 11 | 38 | 25 ( 2 Mar) | 38 | 6 | 2 Mar | 23 Mar | ||||
| 46. | Cormorant | 41 | 1041 | 1082 | 121 | 961 | 413 (19 Mar) | 88 | 14 | 17 Feb | 23 Mar | ||||
| 47. | Spoonbill | 1 | 94 | 95 | 0 | 95 | 63 (21 Mar) | 38 | 6 | 25 Feb | 23 Mar | ||||
| 48. | Great White Egret | 1 | 8 | 9 | 0 | 9 | 4 (19 Mar) | 31 | 5 | 25 Feb | 22 Mar | ||||
| 49. | Grey Heron | 2 | 103 | 105 | 7 | 98 | 40 (19 Mar) | 81 | 13 | 25 Feb | 23 Mar | ||||
| 50. | Sparrowhawk | 0 | 4 | 4 | 0 | 4 | 2 (19 Mar) | 13 | 2 | 19 Mar | 22 Mar | ||||
| 51. | Marsh Harrier | 0 | 15 | 15 | 1 | 14 | 5 (21 Mar) | 25 | 4 | 19 Mar | 22 Mar | ||||
| 52. | Hen Harrier | 1 | 3 | 4 | 4 | 0 | 1 (26 Feb) | 25 | 4 | 26 Feb | 22 Mar | ||||
| 53. | Short-eared Owl | 0 | 2 | 2 | 0 | 2 | 1 (20 Mar) | 13 | 2 | 20 Mar | 21 Mar | ||||
| 54. | Great Spotted Woodpecker | 2 | 10 | 12 | 5 | 7 | 2 (26 Feb) | 50 | 8 | 26 Feb | 22 Mar | ||||
| 55. | Kestrel | 0 | 4 | 4 | 0 | 4 | 4 (21 Mar) | 6 | 1 | 21 Mar | 21 Mar | ||||
| 56. | Peregrine | 0 | 3 | 3 | 0 | 3 | 1 ( 2 Mar) | 19 | 3 | 2 Mar | 22 Mar | ||||
| 57. | Magpie | 0 | 61 | 61 | 6 | 55 | 17 (20 Mar) | 44 | 7 | 2 Mar | 21 Mar | ||||
| 58. | Jackdaw | 11 | 158 | 169 | 35 | 134 | 34 (21 Mar) | 88 | 14 | 25 Feb | 23 Mar | ||||
| 59. | Rook | 0 | 1 | 1 | 0 | 1 | 1 ( 9 Mar) | 6 | 1 | 9 Mar | 9 Mar | ||||
| 60. | Carrion Crow | 2 | 56 | 58 | 4 | 54 | 18 (21 Mar) | 56 | 9 | 25 Feb | 22 Mar | ||||
| Species | Feb | Mar | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 61. | Blue Tit | 0 | 10 | 10 | 3 | 7 | 4 ( 2 Mar) | 25 | 4 | 2 Mar | 8 Mar | ||||
| 62. | Great Tit | 1 | 3 | 4 | 1 | 3 | 2 ( 8 Mar) | 19 | 3 | 25 Feb | 20 Mar | ||||
| 63. | Wood Lark | 1 | 7 | 8 | 0 | 8 | 4 (21 Mar) | 25 | 4 | 25 Feb | 21 Mar | ||||
| 64. | Skylark | 1 | 27 | 28 | 1 | 27 | 11 (21 Mar) | 38 | 6 | 25 Feb | 23 Mar | ||||
| 65. | Sand Martin | 0 | 3 | 3 | 0 | 3 | 2 (21 Mar) | 13 | 2 | 21 Mar | 23 Mar | ||||
| 66. | Swallow | 0 | 1 | 1 | 1 | 0 | 1 (22 Mar) | 6 | 1 | 22 Mar | 22 Mar | ||||
| 67. | Chiffchaff | 0 | 21 | 21 | 4 | 17 | 9 (21 Mar) | 50 | 8 | 7 Mar | 23 Mar | ||||
| 68. | Starling | 15 | 1591 | 1606 | 28 | 1578 | 748 (21 Mar) | 100 | 16 | 17 Feb | 23 Mar | ||||
| 69. | Song Thrush | 0 | 338 | 338 | 2 | 336 | 238 (21 Mar) | 31 | 5 | 8 Mar | 23 Mar | ||||
| 70. | Mistle Thrush | 1 | 42 | 43 | 0 | 43 | 14 (22 Mar) | 50 | 8 | 25 Feb | 23 Mar | ||||
| 71. | Redwing | 1 | 24 | 25 | 2 | 23 | 22 (22 Mar) | 25 | 4 | 25 Feb | 22 Mar | ||||
| 72. | Blackbird | 0 | 2 | 2 | 0 | 2 | 2 (21 Mar) | 6 | 1 | 21 Mar | 21 Mar | ||||
| 73. | Ring Ouzel | 0 | 4 | 4 | 0 | 4 | 2 (22 Mar) | 13 | 2 | 22 Mar | 23 Mar | ||||
| 74. | Dunnock | 0 | 7 | 7 | 0 | 7 | 4 ( 8 Mar) | 25 | 4 | 8 Mar | 21 Mar | ||||
| 75. | Grey Wagtail | 0 | 9 | 9 | 0 | 9 | 6 (21 Mar) | 19 | 3 | 18 Mar | 22 Mar | ||||
| 76. | White Wagtail | 2 | 168 | 170 | 7 | 163 | 66 (22 Mar) | 69 | 11 | 26 Feb | 23 Mar | ||||
| 77. | alba wagtail sp. | 0 | 177 | 177 | 8 | 169 | 87 (21 Mar) | 50 | 8 | 6 Mar | 21 Mar | ||||
| 78. | Motacilla (wagtail) sp. | 0 | 2 | 2 | 0 | 2 | 2 (20 Mar) | 6 | 1 | 20 Mar | 20 Mar | ||||
| 79. | Pied Wagtail | 0 | 14 | 14 | 1 | 13 | 6 ( 8 Mar) | 31 | 5 | 8 Mar | 22 Mar | ||||
| 80. | Meadow Pipit | 2 | 404 | 406 | 11 | 395 | 117 (21 Mar) | 94 | 15 | 17 Feb | 23 Mar | ||||
| 81. | Tree Pipit | 0 | 1 | 1 | 0 | 1 | 1 (23 Mar) | 6 | 1 | 23 Mar | 23 Mar | ||||
| 82. | Rock Pipit | 0 | 5 | 5 | 0 | 5 | 3 (21 Mar) | 19 | 3 | 8 Mar | 22 Mar | ||||
| 83. | Rock Pipit/Water Pipit | 0 | 4 | 4 | 0 | 4 | 2 (20 Mar) | 19 | 3 | 2 Mar | 21 Mar | ||||
| 84. | Chaffinch | 112 | 1629 | 1741 | 20 | 1721 | 977 ( 9 Mar) | 100 | 16 | 17 Feb | 23 Mar | ||||
| 85. | Brambling | 6 | 14 | 20 | 0 | 20 | 5 ( 9 Mar) | 56 | 9 | 17 Feb | 22 Mar | ||||
| 86. | Hawfinch | 0 | 10 | 10 | 2 | 8 | 3 (18 Mar) | 25 | 4 | 8 Mar | 22 Mar | ||||
| 87. | Bullfinch | 0 | 1 | 1 | 0 | 1 | 1 (19 Mar) | 6 | 1 | 19 Mar | 19 Mar | ||||
| 88. | Greenfinch | 0 | 27 | 27 | 2 | 25 | 5 (20 Mar) | 50 | 8 | 2 Mar | 22 Mar | ||||
| 89. | Linnet | 2 | 115 | 117 | 3 | 114 | 50 (21 Mar) | 75 | 12 | 25 Feb | 23 Mar | ||||
| 90. | redpoll sp. | 0 | 5 | 5 | 2 | 3 | 3 (20 Mar) | 19 | 3 | 7 Mar | 22 Mar | ||||
| Species | Feb | Mar | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 91. | Goldfinch | 2 | 84 | 86 | 25 | 61 | 24 ( 8 Mar) | 56 | 9 | 17 Feb | 21 Mar | ||||
| 92. | Siskin | 5 | 41 | 46 | 6 | 40 | 12 ( 6 Mar) | 69 | 11 | 25 Feb | 22 Mar | ||||
| 93. | Yellowhammer | 0 | 2 | 2 | 0 | 2 | 1 (20 Mar) | 13 | 2 | 20 Mar | 22 Mar | ||||
| 94. | Reed Bunting | 1 | 38 | 39 | 2 | 37 | 14 ( 8 Mar) | 75 | 12 | 25 Feb | 23 Mar | ||||
| Other species | |||||||||||||||
| Species | Feb | Mar | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 1. | Bumblebee sp. | 0 | 3 | 3 | 1 | 2 | 3 (22 Mar) | 6 | 1 | 22 Mar | 22 Mar | ||||
| Species | Feb | Mar | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| Totals | 1497 | 17356 | 18853 | 1401 | 17452 | 100 | 16 | ||||||||
| Observation hours | 5:10 | 43:35 | 48:45 | ||||||||||||
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