Totals Maashorst - Hofmans Plassen 2025
| Year | |
| Period | |
| count-field | |
| Also present | |
| Species | Mar | Apr | May | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 1. | Barnacle Goose | 1 | 4 | 16 | 21 | 0 | 21 | 8 (19 May) | 15 | 9 | 30 Mar | 26 May | ||||
| 2. | Greylag Goose | 11 | 6 | 0 | 17 | 0 | 17 | 9 (20 Mar) | 7 | 4 | 10 Mar | 5 Apr | ||||
| 3. | Tundra Bean Goose | 15 | 0 | 0 | 15 | 0 | 15 | 15 (20 Mar) | 2 | 1 | 20 Mar | 20 Mar | ||||
| 4. | Eurasian White-fronted Goose | 561 | 0 | 0 | 561 | 0 | 561 | 561 (20 Mar) | 2 | 1 | 20 Mar | 20 Mar | ||||
| 5. | Mute Swan | 0 | 6 | 0 | 6 | 0 | 6 | 3 (10 Apr) | 3 | 2 | 10 Apr | 16 Apr | ||||
| 6. | Shelduck | 0 | 4 | 0 | 4 | 0 | 4 | 2 (15 Apr) | 3 | 2 | 15 Apr | 30 Apr | ||||
| 7. | Shoveler | 6 | 36 | 4 | 46 | 0 | 46 | 19 (13 Apr) | 11 | 7 | 20 Mar | 22 May | ||||
| 8. | Gadwall | 3 | 2 | 0 | 5 | 0 | 5 | 3 (20 Mar) | 3 | 2 | 20 Mar | 22 Apr | ||||
| 9. | Wigeon | 16 | 2 | 0 | 18 | 0 | 18 | 9 (29 Mar) | 7 | 4 | 20 Mar | 11 Apr | ||||
| 10. | Mallard | 2 | 0 | 0 | 2 | 0 | 2 | 2 (10 Mar) | 2 | 1 | 10 Mar | 10 Mar | ||||
| 11. | Pintail | 0 | 2 | 0 | 2 | 0 | 2 | 2 (11 Apr) | 2 | 1 | 11 Apr | 11 Apr | ||||
| 12. | Teal | 34 | 15 | 1 | 50 | 0 | 50 | 26 (20 Mar) | 11 | 7 | 20 Mar | 11 May | ||||
| 13. | Pochard | 0 | 7 | 0 | 7 | 0 | 7 | 4 (16 Apr) | 5 | 3 | 5 Apr | 25 Apr | ||||
| 14. | Tufted Duck | 1 | 8 | 9 | 18 | 0 | 18 | 8 ( 5 Apr) | 10 | 6 | 20 Mar | 26 May | ||||
| 15. | Goosander | 0 | 2 | 1 | 3 | 0 | 3 | 2 (14 Apr) | 3 | 2 | 14 Apr | 2 May | ||||
| 16. | Red-breasted Merganser | 0 | 4 | 0 | 4 | 0 | 4 | 4 ( 1 Apr) | 2 | 1 | 1 Apr | 1 Apr | ||||
| 17. | Quail | 0 | 0 | 1 | 1 | 0 | 1 | 1 (29 May) | 2 | 1 | 29 May | 29 May | ||||
| 18. | Swift | 0 | 305 | 578 | 883 | 0 | 883 | 117 (26 Apr) | 41 | 25 | 19 Apr | 20 May | ||||
| 19. | Cuckoo | 0 | 2 | 1 | 3 | 0 | 3 | 1 ( 7 Apr) | 5 | 3 | 7 Apr | 3 May | ||||
| 20. | Stock Dove | 9 | 37 | 1 | 47 | 0 | 47 | 10 ( 4 Apr) | 26 | 16 | 10 Mar | 2 May | ||||
| 21. | Woodpigeon | 1305 | 1482 | 0 | 2787 | 0 | 2787 | 640 (20 Mar) | 44 | 27 | 10 Mar | 20 Apr | ||||
| 22. | Turtle Dove | 0 | 0 | 2 | 2 | 0 | 2 | 1 (11 May) | 3 | 2 | 11 May | 12 May | ||||
| 23. | Collared Dove | 0 | 0 | 1 | 1 | 0 | 1 | 1 (21 May) | 2 | 1 | 21 May | 21 May | ||||
| 24. | Crane | 57 | 3 | 0 | 60 | 0 | 60 | 55 (22 Mar) | 7 | 4 | 20 Mar | 13 Apr | ||||
| 25. | Great Crested Grebe | 0 | 2 | 0 | 2 | 0 | 2 | 2 (28 Apr) | 2 | 1 | 28 Apr | 28 Apr | ||||
| 26. | Oystercatcher | 4 | 2 | 0 | 6 | 0 | 6 | 2 (10 Mar) | 5 | 3 | 10 Mar | 2 Apr | ||||
| 27. | Avocet | 1 | 2 | 2 | 5 | 0 | 5 | 2 (10 Apr) | 5 | 3 | 28 Mar | 8 May | ||||
| 28. | Golden Plover | 0 | 6 | 0 | 6 | 0 | 6 | 6 ( 7 Apr) | 2 | 1 | 7 Apr | 7 Apr | ||||
| 29. | Ringed Plover | 0 | 0 | 6 | 6 | 0 | 6 | 3 (15 May) | 5 | 3 | 4 May | 26 May | ||||
| 30. | Little Ringed Plover | 19 | 56 | 5 | 80 | 0 | 80 | 8 ( 8 Apr) | 49 | 30 | 10 Mar | 20 May | ||||
| Species | Mar | Apr | May | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 31. | Lapwing | 15 | 37 | 0 | 52 | 0 | 52 | 15 ( 5 Apr) | 23 | 14 | 20 Mar | 20 Apr | ||||
| 32. | Whimbrel | 0 | 10 | 4 | 14 | 0 | 14 | 3 (15 Apr) | 13 | 8 | 10 Apr | 12 May | ||||
| 33. | Curlew | 5 | 12 | 3 | 20 | 0 | 20 | 4 (12 Apr) | 21 | 13 | 10 Mar | 10 May | ||||
| 34. | Black-tailed Godwit | 0 | 1 | 0 | 1 | 0 | 1 | 1 (12 Apr) | 2 | 1 | 12 Apr | 12 Apr | ||||
| 35. | Snipe | 2 | 3 | 0 | 5 | 0 | 5 | 2 (20 Mar) | 7 | 4 | 20 Mar | 27 Apr | ||||
| 36. | Common Sandpiper | 0 | 14 | 28 | 42 | 0 | 42 | 12 ( 3 May) | 18 | 11 | 12 Apr | 22 May | ||||
| 37. | Green Sandpiper | 6 | 106 | 0 | 112 | 0 | 112 | 18 ( 6 Apr) | 34 | 21 | 22 Mar | 28 Apr | ||||
| 38. | Wood Sandpiper | 0 | 2 | 0 | 2 | 0 | 2 | 1 (26 Apr) | 3 | 2 | 26 Apr | 27 Apr | ||||
| 39. | Redshank | 2 | 6 | 4 | 12 | 0 | 12 | 2 ( 8 Apr) | 18 | 11 | 26 Mar | 23 May | ||||
| 40. | Greenshank | 0 | 7 | 3 | 10 | 0 | 10 | 5 (25 Apr) | 10 | 6 | 20 Apr | 4 May | ||||
| 41. | Ruff | 1 | 0 | 0 | 1 | 0 | 1 | 1 (26 Mar) | 2 | 1 | 26 Mar | 26 Mar | ||||
| 42. | Caspian Tern | 0 | 0 | 1 | 1 | 0 | 1 | 1 (15 May) | 2 | 1 | 15 May | 15 May | ||||
| 43. | Black Tern | 0 | 0 | 20 | 20 | 0 | 20 | 20 (20 May) | 2 | 1 | 20 May | 20 May | ||||
| 44. | Common Tern | 0 | 4 | 19 | 23 | 0 | 23 | 5 ( 6 May) | 20 | 12 | 15 Apr | 30 May | ||||
| 45. | Little Gull | 0 | 1 | 0 | 1 | 0 | 1 | 1 (13 Apr) | 2 | 1 | 13 Apr | 13 Apr | ||||
| 46. | Black-headed Gull | 62 | 78 | 69 | 209 | 0 | 209 | 23 (10 Mar) | 54 | 33 | 10 Mar | 23 May | ||||
| 47. | Mediterranean Gull | 0 | 2 | 0 | 2 | 0 | 2 | 1 ( 6 Apr) | 3 | 2 | 6 Apr | 21 Apr | ||||
| 48. | Common Gull | 33 | 23 | 3 | 59 | 0 | 59 | 25 (16 Mar) | 28 | 17 | 10 Mar | 15 May | ||||
| 49. | Caspian Gull | 15 | 43 | 42 | 100 | 0 | 100 | 8 (22 Apr) | 64 | 39 | 10 Mar | 30 May | ||||
| 50. | Herring Gull | 3 | 0 | 0 | 3 | 0 | 3 | 3 (10 Mar) | 2 | 1 | 10 Mar | 10 Mar | ||||
| 51. | Yellow-legged Gull | 0 | 12 | 8 | 20 | 0 | 20 | 2 ( 6 Apr) | 28 | 17 | 5 Apr | 21 May | ||||
| 52. | Lesser Black-backed Gull | 191 | 506 | 568 | 1265 | 0 | 1265 | 99 (26 Mar) | 92 | 56 | 10 Mar | 22 May | ||||
| 53. | Black Stork | 0 | 0 | 1 | 1 | 0 | 1 | 1 ( 2 May) | 2 | 1 | 2 May | 2 May | ||||
| 54. | White Stork | 7 | 78 | 8 | 93 | 0 | 93 | 24 ( 6 Apr) | 21 | 13 | 29 Mar | 8 May | ||||
| 55. | Cormorant | 212 | 540 | 74 | 826 | 0 | 826 | 71 (20 Mar) | 85 | 52 | 10 Mar | 30 May | ||||
| 56. | Spoonbill | 0 | 4 | 7 | 11 | 0 | 11 | 3 ( 6 Apr) | 10 | 6 | 6 Apr | 29 May | ||||
| 57. | Great White Egret | 5 | 61 | 3 | 69 | 0 | 69 | 17 ( 8 Apr) | 30 | 18 | 20 Mar | 14 May | ||||
| 58. | Grey Heron | 29 | 38 | 2 | 69 | 0 | 69 | 10 (20 Mar) | 38 | 23 | 10 Mar | 2 May | ||||
| 59. | Purple Heron | 0 | 4 | 0 | 4 | 0 | 4 | 2 (23 Apr) | 5 | 3 | 11 Apr | 23 Apr | ||||
| 60. | Osprey | 0 | 16 | 3 | 19 | 0 | 19 | 3 (21 Apr) | 25 | 15 | 2 Apr | 20 May | ||||
| Species | Mar | Apr | May | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 61. | Honey Buzzard | 0 | 0 | 30 | 30 | 0 | 30 | 10 (12 May) | 7 | 4 | 11 May | 14 May | ||||
| 62. | Griffon Vulture | 0 | 1 | 0 | 1 | 0 | 1 | 1 (18 Apr) | 2 | 1 | 18 Apr | 18 Apr | ||||
| 63. | Sparrowhawk | 20 | 34 | 0 | 54 | 0 | 54 | 9 ( 4 Apr) | 28 | 17 | 10 Mar | 13 Apr | ||||
| 64. | Marsh Harrier | 6 | 75 | 5 | 86 | 0 | 86 | 13 ( 5 Apr) | 49 | 30 | 20 Mar | 13 May | ||||
| 65. | Hen Harrier | 1 | 13 | 0 | 14 | 0 | 14 | 3 (13 Apr) | 16 | 10 | 22 Mar | 23 Apr | ||||
| 66. | Pallid Harrier | 0 | 2 | 0 | 2 | 0 | 2 | 2 (13 Apr) | 2 | 1 | 13 Apr | 13 Apr | ||||
| 67. | Montagu's Harrier | 0 | 1 | 0 | 1 | 0 | 1 | 1 (21 Apr) | 2 | 1 | 21 Apr | 21 Apr | ||||
| 68. | Red Kite | 3 | 16 | 13 | 32 | 0 | 32 | 3 ( 7 Apr) | 41 | 25 | 10 Mar | 20 May | ||||
| 69. | Black Kite | 0 | 12 | 5 | 17 | 0 | 17 | 3 (13 Apr) | 18 | 11 | 4 Apr | 11 May | ||||
| 70. | White-tailed Eagle | 0 | 1 | 0 | 1 | 0 | 1 | 1 ( 5 Apr) | 2 | 1 | 5 Apr | 5 Apr | ||||
| 71. | Common Buzzard | 53 | 1 | 0 | 54 | 0 | 54 | 30 (20 Mar) | 8 | 5 | 10 Mar | 1 Apr | ||||
| 72. | Kestrel | 9 | 93 | 4 | 106 | 0 | 106 | 20 ( 6 Apr) | 41 | 25 | 20 Mar | 20 May | ||||
| 73. | Merlin | 1 | 21 | 3 | 25 | 0 | 25 | 3 ( 7 Apr) | 31 | 19 | 23 Mar | 14 May | ||||
| 74. | Hobby | 0 | 13 | 20 | 33 | 0 | 33 | 6 (12 May) | 31 | 19 | 17 Apr | 24 May | ||||
| 75. | Peregrine | 1 | 4 | 0 | 5 | 0 | 5 | 2 ( 8 Apr) | 7 | 4 | 16 Mar | 8 Apr | ||||
| 76. | Golden Oriole | 0 | 2 | 3 | 5 | 0 | 5 | 1 (20 Apr) | 8 | 5 | 20 Apr | 30 May | ||||
| 77. | Magpie | 1 | 0 | 0 | 1 | 0 | 1 | 1 (10 Mar) | 2 | 1 | 10 Mar | 10 Mar | ||||
| 78. | Jackdaw | 9 | 40 | 0 | 49 | 0 | 49 | 12 ( 4 Apr) | 13 | 8 | 10 Mar | 8 Apr | ||||
| 79. | Rook | 1 | 1 | 0 | 2 | 0 | 2 | 1 (20 Mar) | 3 | 2 | 20 Mar | 28 Apr | ||||
| 80. | Carrion Crow | 62 | 22 | 0 | 84 | 0 | 84 | 30 (20 Mar) | 21 | 13 | 10 Mar | 13 Apr | ||||
| 81. | Blue Tit | 1 | 0 | 0 | 1 | 0 | 1 | 1 (23 Mar) | 2 | 1 | 23 Mar | 23 Mar | ||||
| 82. | Wood Lark | 22 | 2 | 0 | 24 | 0 | 24 | 16 (10 Mar) | 7 | 4 | 10 Mar | 12 Apr | ||||
| 83. | Skylark | 4 | 2 | 0 | 6 | 0 | 6 | 2 (10 Mar) | 8 | 5 | 10 Mar | 18 Apr | ||||
| 84. | Sand Martin | 25 | 322 | 161 | 508 | 0 | 508 | 29 ( 7 Apr) | 77 | 47 | 20 Mar | 20 May | ||||
| 85. | Swallow | 37 | 1504 | 914 | 2455 | 0 | 2455 | 234 (27 Apr) | 90 | 55 | 16 Mar | 24 May | ||||
| 86. | House Martin | 0 | 13 | 21 | 34 | 0 | 34 | 7 (24 May) | 26 | 16 | 7 Apr | 24 May | ||||
| 87. | Chiffchaff | 0 | 2 | 0 | 2 | 0 | 2 | 2 ( 2 Apr) | 2 | 1 | 2 Apr | 2 Apr | ||||
| 88. | Great Reed Warbler | 0 | 0 | 1 | 1 | 0 | 1 | 1 (13 May) | 2 | 1 | 13 May | 13 May | ||||
| 89. | Sedge Warbler | 0 | 1 | 0 | 1 | 0 | 1 | 1 (28 Apr) | 2 | 1 | 28 Apr | 28 Apr | ||||
| 90. | Marsh Warbler | 0 | 0 | 1 | 1 | 0 | 1 | 1 (13 May) | 2 | 1 | 13 May | 13 May | ||||
| Species | Mar | Apr | May | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 91. | Starling | 2035 | 47 | 0 | 2082 | 0 | 2082 | 675 (23 Mar) | 33 | 20 | 10 Mar | 19 Apr | ||||
| 92. | Song Thrush | 67 | 15 | 0 | 82 | 0 | 82 | 29 (22 Mar) | 15 | 9 | 10 Mar | 20 Apr | ||||
| 93. | Mistle Thrush | 0 | 2 | 0 | 2 | 0 | 2 | 1 ( 1 Apr) | 3 | 2 | 1 Apr | 7 Apr | ||||
| 94. | Redwing | 1199 | 1014 | 0 | 2213 | 0 | 2213 | 430 ( 7 Apr) | 33 | 20 | 10 Mar | 15 Apr | ||||
| 95. | Blackbird | 2 | 3 | 0 | 5 | 0 | 5 | 2 (22 Mar) | 5 | 3 | 22 Mar | 6 Apr | ||||
| 96. | Fieldfare | 260 | 782 | 0 | 1042 | 0 | 1042 | 245 ( 4 Apr) | 30 | 18 | 20 Mar | 17 Apr | ||||
| 97. | Ring Ouzel | 0 | 55 | 0 | 55 | 0 | 55 | 25 ( 6 Apr) | 16 | 10 | 3 Apr | 25 Apr | ||||
| 98. | Bluethroat | 0 | 1 | 0 | 1 | 0 | 1 | 1 (13 Apr) | 2 | 1 | 13 Apr | 13 Apr | ||||
| 99. | Redstart | 0 | 1 | 0 | 1 | 0 | 1 | 1 (11 Apr) | 2 | 1 | 11 Apr | 11 Apr | ||||
| 100. | House Sparrow | 0 | 2 | 0 | 2 | 0 | 2 | 1 ( 1 Apr) | 3 | 2 | 1 Apr | 2 Apr | ||||
| 101. | Dunnock | 0 | 1 | 0 | 1 | 0 | 1 | 1 ( 4 Apr) | 2 | 1 | 4 Apr | 4 Apr | ||||
| 102. | Blue-headed Wagtail | 1 | 226 | 71 | 298 | 0 | 298 | 31 (30 Apr) | 67 | 41 | 29 Mar | 20 May | ||||
| 103. | Grey-headed Wagtail | 0 | 1 | 248 | 249 | 0 | 249 | 188 (11 May) | 15 | 9 | 29 Apr | 14 May | ||||
| 104. | Grey Wagtail | 2 | 1 | 2 | 5 | 0 | 5 | 2 (22 Mar) | 7 | 4 | 22 Mar | 21 May | ||||
| 105. | White Wagtail | 61 | 155 | 2 | 218 | 0 | 218 | 26 (22 Mar) | 43 | 26 | 10 Mar | 13 May | ||||
| 106. | Meadow Pipit | 37 | 6066 | 7 | 6110 | 0 | 6110 | 1122 ( 8 Apr) | 62 | 38 | 10 Mar | 10 May | ||||
| 107. | Tree Pipit | 0 | 31 | 6 | 37 | 0 | 37 | 7 ( 8 Apr) | 30 | 18 | 1 Apr | 8 May | ||||
| 108. | Chaffinch | 10474 | 2366 | 0 | 12840 | 0 | 12840 | 4701 (10 Mar) | 26 | 16 | 10 Mar | 8 Apr | ||||
| 109. | Brambling | 2 | 1 | 0 | 3 | 0 | 3 | 1 (10 Mar) | 5 | 3 | 10 Mar | 13 Apr | ||||
| 110. | Hawfinch | 9 | 1 | 0 | 10 | 0 | 10 | 9 (10 Mar) | 3 | 2 | 10 Mar | 3 Apr | ||||
| 111. | Greenfinch | 2 | 4 | 0 | 6 | 0 | 6 | 3 ( 2 Apr) | 5 | 3 | 22 Mar | 3 Apr | ||||
| 112. | Linnet | 25 | 256 | 18 | 299 | 0 | 299 | 41 ( 6 Apr) | 51 | 31 | 20 Mar | 15 May | ||||
| 113. | Goldfinch | 0 | 7 | 0 | 7 | 0 | 7 | 5 ( 7 Apr) | 5 | 3 | 3 Apr | 7 Apr | ||||
| 114. | Siskin | 32 | 1 | 0 | 33 | 0 | 33 | 14 (23 Mar) | 7 | 4 | 10 Mar | 11 Apr | ||||
| 115. | Reed Bunting | 29 | 3 | 0 | 32 | 0 | 32 | 9 (22 Mar) | 13 | 8 | 10 Mar | 3 Apr | ||||
| Other species | ||||||||||||||||
| Species | Mar | Apr | May | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 1. | Swallowtail | 0 | 3 | 6 | 9 | 0 | 9 | 1 (15 Apr) | 15 | 9 | 15 Apr | 20 May | ||||
| 2. | Red Admiral | 0 | 1 | 1 | 2 | 0 | 2 | 1 ( 3 Apr) | 3 | 2 | 3 Apr | 30 May | ||||
| 3. | Painted Lady | 0 | 0 | 1 | 1 | 0 | 1 | 1 (22 May) | 2 | 1 | 22 May | 22 May | ||||
| Species | Mar | Apr | May | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| Totals | 17126 | 16847 | 3041 | 37014 | 0 | 37014 | 100 | 61 | ||||||||
| Observation hours | 57:30 | 214:39 | 166:10 | 438:19 | ||||||||||||
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