Also present
Totals Aetsveldsche polder, Nigtevecht 2016
| Species | May | Jun | Jul | Aug | Sep | Oct | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 1. | Canada Goose | 0 | 0 | 0 | 2 | 47 | 55 | 104 | 71 | 33 | 55 ( 1 Oct) | 40 | 4 | 19 Aug | 1 Oct | ||||
| 2. | Barnacle Goose | 46 | 0 | 0 | 0 | 68 | 0 | 114 | 68 | 46 | 61 (11 Sep) | 30 | 3 | 3 May | 17 Sep | ||||
| 3. | Greylag Goose | 47 | 0 | 0 | 1302 | 2051 | 620 | 4020 | 3904 | 116 | 1839 (11 Sep) | 90 | 9 | 3 May | 1 Oct | ||||
| 4. | goose sp. | 11 | 0 | 0 | 0 | 0 | 0 | 11 | 0 | 11 | 11 ( 3 May) | 10 | 1 | 3 May | 3 May | ||||
| 5. | Tundra Bean Goose | 0 | 0 | 0 | 0 | 0 | 14 | 14 | 14 | 0 | 14 ( 1 Oct) | 10 | 1 | 1 Oct | 1 Oct | ||||
| 6. | Eurasian White-fronted Goose | 0 | 0 | 0 | 0 | 1 | 4 | 5 | 4 | 1 | 4 (18 Oct) | 20 | 2 | 18 Sep | 18 Oct | ||||
| 7. | Mute Swan | 65 | 0 | 0 | 2 | 1 | 0 | 68 | 2 | 66 | 65 ( 3 May) | 30 | 3 | 3 May | 11 Sep | ||||
| 8. | Egyptian Goose | 14 | 0 | 0 | 74 | 48 | 9 | 145 | 128 | 17 | 42 (20 Aug) | 80 | 8 | 3 May | 1 Oct | ||||
| 9. | Shelduck | 1 | 0 | 0 | 5 | 0 | 0 | 6 | 0 | 6 | 5 (17 Aug) | 20 | 2 | 3 May | 17 Aug | ||||
| 10. | Gadwall | 2 | 0 | 0 | 17 | 42 | 6 | 67 | 63 | 4 | 25 (18 Sep) | 90 | 9 | 3 May | 1 Oct | ||||
| 11. | Wigeon | 0 | 0 | 0 | 9 | 111 | 208 | 328 | 328 | 0 | 208 ( 1 Oct) | 40 | 4 | 17 Aug | 1 Oct | ||||
| 12. | Mallard | 2 | 0 | 0 | 13 | 12 | 19 | 46 | 44 | 2 | 19 ( 1 Oct) | 60 | 6 | 3 May | 1 Oct | ||||
| 13. | Pintail | 0 | 0 | 0 | 0 | 5 | 0 | 5 | 5 | 0 | 5 (11 Sep) | 10 | 1 | 11 Sep | 11 Sep | ||||
| 14. | Pochard | 0 | 0 | 0 | 4 | 0 | 0 | 4 | 4 | 0 | 4 (19 Aug) | 10 | 1 | 19 Aug | 19 Aug | ||||
| 15. | Tufted Duck | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 1 ( 3 May) | 10 | 1 | 3 May | 3 May | ||||
| 16. | Swift | 15 | 0 | 0 | 1 | 0 | 0 | 16 | 1 | 15 | 15 ( 3 May) | 20 | 2 | 3 May | 20 Aug | ||||
| 17. | Cuckoo | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 1 | 0 | 1 (17 Aug) | 10 | 1 | 17 Aug | 17 Aug | ||||
| 18. | Stock Dove | 2 | 0 | 0 | 1 | 12 | 4 | 19 | 17 | 2 | 4 ( 7 Sep) | 70 | 7 | 3 May | 1 Oct | ||||
| 19. | Woodpigeon | 6 | 0 | 0 | 1 | 33 | 16 | 56 | 52 | 4 | 20 (11 Sep) | 70 | 7 | 3 May | 1 Oct | ||||
| 20. | Collared Dove | 0 | 0 | 0 | 2 | 0 | 0 | 2 | 1 | 1 | 2 (20 Aug) | 10 | 1 | 20 Aug | 20 Aug | ||||
| 21. | Coot | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 1 ( 3 May) | 10 | 1 | 3 May | 3 May | ||||
| 22. | Great Crested Grebe | 2 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 2 | 2 ( 3 May) | 10 | 1 | 3 May | 3 May | ||||
| 23. | Oystercatcher | 4 | 0 | 0 | 0 | 0 | 0 | 4 | 0 | 4 | 4 ( 3 May) | 10 | 1 | 3 May | 3 May | ||||
| 24. | Golden Plover | 0 | 0 | 0 | 122 | 108 | 32 | 262 | 262 | 0 | 121 (17 Aug) | 60 | 6 | 17 Aug | 1 Oct | ||||
| 25. | Lapwing | 1 | 0 | 0 | 44 | 219 | 42 | 306 | 295 | 11 | 190 (18 Sep) | 90 | 9 | 3 May | 1 Oct | ||||
| 26. | Whimbrel | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 1 | 0 | 1 (19 Aug) | 10 | 1 | 19 Aug | 19 Aug | ||||
| 27. | Curlew | 1 | 0 | 0 | 15 | 40 | 1 | 57 | 56 | 1 | 28 (11 Sep) | 70 | 7 | 3 May | 1 Oct | ||||
| 28. | Jack Snipe | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 0 | 1 ( 1 Oct) | 10 | 1 | 1 Oct | 1 Oct | ||||
| 29. | Snipe | 0 | 0 | 0 | 70 | 104 | 13 | 187 | 187 | 0 | 77 (11 Sep) | 80 | 8 | 17 Aug | 1 Oct | ||||
| 30. | Common Sandpiper | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 1 ( 3 May) | 10 | 1 | 3 May | 3 May | ||||
| Species | May | Jun | Jul | Aug | Sep | Oct | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 31. | Wood Sandpiper | 6 | 0 | 0 | 1 | 0 | 0 | 7 | 1 | 6 | 6 ( 3 May) | 20 | 2 | 3 May | 17 Aug | ||||
| 32. | Redshank | 0 | 0 | 0 | 2 | 0 | 0 | 2 | 2 | 0 | 2 (20 Aug) | 10 | 1 | 20 Aug | 20 Aug | ||||
| 33. | wader sp. | 12 | 0 | 0 | 0 | 0 | 0 | 12 | 0 | 12 | 12 ( 3 May) | 10 | 1 | 3 May | 3 May | ||||
| 34. | Caspian Tern | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 1 | 0 | 1 (17 Aug) | 10 | 1 | 17 Aug | 17 Aug | ||||
| 35. | Common Tern | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 1 | 0 | 1 (20 Aug) | 10 | 1 | 20 Aug | 20 Aug | ||||
| 36. | Black-headed Gull | 4 | 0 | 0 | 84 | 326 | 53 | 467 | 453 | 14 | 195 (11 Sep) | 90 | 9 | 3 May | 1 Oct | ||||
| 37. | Common Gull | 0 | 0 | 0 | 8 | 12 | 8 | 28 | 28 | 0 | 8 ( 1 Oct) | 70 | 7 | 17 Aug | 1 Oct | ||||
| 38. | Caspian Gull | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 1 ( 3 May) | 10 | 1 | 3 May | 3 May | ||||
| 39. | Herring Gull | 2 | 0 | 0 | 2 | 0 | 1 | 5 | 2 | 3 | 2 ( 3 May) | 40 | 4 | 3 May | 1 Oct | ||||
| 40. | Yellow-legged Gull | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 1 | 0 | 1 ( 7 Sep) | 10 | 1 | 7 Sep | 7 Sep | ||||
| 41. | Great Black-backed Gull | 0 | 0 | 0 | 2 | 1 | 1 | 4 | 4 | 0 | 1 (19 Aug) | 40 | 4 | 19 Aug | 1 Oct | ||||
| 42. | Lesser Black-backed Gull | 3 | 0 | 0 | 13 | 17 | 2 | 35 | 30 | 5 | 8 (11 Sep) | 80 | 8 | 3 May | 1 Oct | ||||
| 43. | White Stork | 3 | 0 | 0 | 4 | 17 | 3 | 27 | 24 | 3 | 11 (11 Sep) | 50 | 5 | 3 May | 1 Oct | ||||
| 44. | Cormorant | 3 | 0 | 0 | 58 | 508 | 216 | 785 | 718 | 67 | 216 ( 1 Oct) | 90 | 9 | 3 May | 1 Oct | ||||
| 45. | Spoonbill | 3 | 0 | 0 | 2 | 9 | 0 | 14 | 9 | 5 | 9 (11 Sep) | 30 | 3 | 3 May | 11 Sep | ||||
| 46. | Great White Egret | 2 | 0 | 0 | 3 | 15 | 3 | 23 | 22 | 1 | 8 (17 Sep) | 90 | 9 | 3 May | 1 Oct | ||||
| 47. | Grey Heron | 3 | 0 | 0 | 7 | 4 | 15 | 29 | 26 | 3 | 15 ( 1 Oct) | 50 | 5 | 3 May | 1 Oct | ||||
| 48. | Purple Heron | 4 | 0 | 0 | 2 | 0 | 0 | 6 | 2 | 4 | 4 ( 3 May) | 20 | 2 | 3 May | 20 Aug | ||||
| 49. | Osprey | 0 | 0 | 0 | 0 | 4 | 1 | 5 | 5 | 0 | 3 (11 Sep) | 30 | 3 | 11 Sep | 1 Oct | ||||
| 50. | Sparrowhawk | 2 | 0 | 0 | 12 | 5 | 4 | 23 | 21 | 2 | 10 (17 Aug) | 70 | 7 | 3 May | 1 Oct | ||||
| 51. | Goshawk | 0 | 0 | 0 | 1 | 3 | 1 | 5 | 5 | 0 | 3 (11 Sep) | 30 | 3 | 20 Aug | 1 Oct | ||||
| 52. | Marsh Harrier | 2 | 0 | 0 | 13 | 8 | 9 | 32 | 30 | 2 | 9 ( 1 Oct) | 80 | 8 | 3 May | 1 Oct | ||||
| 53. | White-tailed Eagle | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 1 ( 3 May) | 10 | 1 | 3 May | 3 May | ||||
| 54. | Common Buzzard | 1 | 0 | 0 | 10 | 36 | 9 | 56 | 55 | 1 | 24 (11 Sep) | 60 | 6 | 3 May | 1 Oct | ||||
| 55. | Great Spotted Woodpecker | 0 | 0 | 0 | 0 | 1 | 1 | 2 | 2 | 0 | 1 (18 Sep) | 20 | 2 | 18 Sep | 1 Oct | ||||
| 56. | Kestrel | 0 | 0 | 0 | 5 | 3 | 0 | 8 | 6 | 2 | 3 (17 Aug) | 30 | 3 | 17 Aug | 11 Sep | ||||
| 57. | falcon sp. | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 0 | 1 ( 1 Oct) | 10 | 1 | 1 Oct | 1 Oct | ||||
| 58. | Merlin | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 1 | 0 | 1 (11 Sep) | 10 | 1 | 11 Sep | 11 Sep | ||||
| 59. | Hobby | 0 | 0 | 0 | 5 | 7 | 0 | 12 | 12 | 0 | 5 (11 Sep) | 40 | 4 | 17 Aug | 17 Sep | ||||
| 60. | Peregrine | 0 | 0 | 0 | 2 | 7 | 0 | 9 | 9 | 0 | 6 (18 Sep) | 30 | 3 | 17 Aug | 18 Sep | ||||
| Species | May | Jun | Jul | Aug | Sep | Oct | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 61. | Rose-ringed Parakeet | 1 | 0 | 0 | 12 | 24 | 47 | 84 | 82 | 2 | 47 ( 1 Oct) | 60 | 6 | 3 May | 1 Oct | ||||
| 62. | Magpie | 0 | 0 | 0 | 2 | 1 | 0 | 3 | 3 | 0 | 2 (17 Aug) | 20 | 2 | 17 Aug | 7 Sep | ||||
| 63. | Jackdaw | 35 | 0 | 0 | 217 | 503 | 210 | 965 | 881 | 84 | 229 ( 7 Sep) | 90 | 9 | 3 May | 1 Oct | ||||
| 64. | Rook | 0 | 0 | 0 | 0 | 9 | 0 | 9 | 9 | 0 | 4 ( 7 Sep) | 30 | 3 | 7 Sep | 17 Sep | ||||
| 65. | Carrion Crow | 0 | 0 | 0 | 1 | 1 | 3 | 5 | 5 | 0 | 3 ( 1 Oct) | 30 | 3 | 17 Aug | 1 Oct | ||||
| 66. | Raven | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 1 | 1 (17 Sep) | 10 | 1 | 17 Sep | 17 Sep | ||||
| 67. | Great Tit | 2 | 0 | 0 | 1 | 0 | 0 | 3 | 1 | 2 | 2 ( 3 May) | 20 | 2 | 3 May | 20 Aug | ||||
| 68. | Skylark | 0 | 0 | 0 | 0 | 0 | 5 | 5 | 5 | 0 | 4 (18 Oct) | 20 | 2 | 1 Oct | 18 Oct | ||||
| 69. | Sand Martin | 0 | 0 | 0 | 2 | 15 | 0 | 17 | 17 | 0 | 15 ( 7 Sep) | 20 | 2 | 17 Aug | 7 Sep | ||||
| 70. | Swallow | 19 | 0 | 0 | 26 | 489 | 8 | 542 | 528 | 14 | 440 (11 Sep) | 90 | 9 | 3 May | 1 Oct | ||||
| 71. | House Martin | 0 | 0 | 0 | 2 | 0 | 0 | 2 | 2 | 0 | 1 (17 Aug) | 20 | 2 | 17 Aug | 19 Aug | ||||
| 72. | Willow Warbler | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 1 | 0 | 1 (20 Aug) | 10 | 1 | 20 Aug | 20 Aug | ||||
| 73. | Chiffchaff | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 1 | 0 | 1 (18 Sep) | 10 | 1 | 18 Sep | 18 Sep | ||||
| 74. | Starling | 58 | 0 | 0 | 126 | 359 | 1240 | 1783 | 1725 | 58 | 1240 ( 1 Oct) | 90 | 9 | 3 May | 1 Oct | ||||
| 75. | Song Thrush | 0 | 0 | 0 | 0 | 1 | 2 | 3 | 3 | 0 | 2 ( 1 Oct) | 20 | 2 | 17 Sep | 1 Oct | ||||
| 76. | Mistle Thrush | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 1 | 0 | 1 (17 Aug) | 10 | 1 | 17 Aug | 17 Aug | ||||
| 77. | Fieldfare | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 1 | 0 | 1 (18 Sep) | 10 | 1 | 18 Sep | 18 Sep | ||||
| 78. | Whinchat | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 1 | 0 | 1 (17 Aug) | 10 | 1 | 17 Aug | 17 Aug | ||||
| 79. | Tree Sparrow | 0 | 0 | 0 | 0 | 4 | 15 | 19 | 19 | 0 | 15 ( 1 Oct) | 20 | 2 | 7 Sep | 1 Oct | ||||
| 80. | Blue-headed Wagtail | 0 | 0 | 0 | 40 | 35 | 4 | 79 | 78 | 1 | 19 (19 Aug) | 80 | 8 | 17 Aug | 1 Oct | ||||
| 81. | Grey Wagtail | 0 | 0 | 0 | 0 | 1 | 8 | 9 | 9 | 0 | 7 ( 1 Oct) | 30 | 3 | 11 Sep | 18 Oct | ||||
| 82. | White Wagtail | 0 | 0 | 0 | 9 | 13 | 18 | 40 | 40 | 0 | 18 ( 1 Oct) | 80 | 8 | 17 Aug | 1 Oct | ||||
| 83. | Meadow Pipit | 2 | 0 | 0 | 0 | 116 | 2870 | 2988 | 2986 | 2 | 2865 ( 1 Oct) | 50 | 5 | 3 May | 18 Oct | ||||
| 84. | Tree Pipit | 1 | 0 | 0 | 2 | 1 | 1 | 5 | 4 | 1 | 1 ( 3 May) | 50 | 5 | 3 May | 1 Oct | ||||
| 85. | Water Pipit | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 0 | 1 ( 1 Oct) | 10 | 1 | 1 Oct | 1 Oct | ||||
| 86. | Chaffinch | 0 | 0 | 0 | 0 | 11 | 230 | 241 | 241 | 0 | 230 ( 1 Oct) | 40 | 4 | 11 Sep | 1 Oct | ||||
| 87. | Brambling | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 0 | 1 ( 1 Oct) | 10 | 1 | 1 Oct | 1 Oct | ||||
| 88. | Bullfinch | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 0 | 1 ( 1 Oct) | 10 | 1 | 1 Oct | 1 Oct | ||||
| 89. | Greenfinch | 2 | 0 | 0 | 9 | 3 | 24 | 38 | 31 | 7 | 24 ( 1 Oct) | 70 | 7 | 3 May | 1 Oct | ||||
| 90. | Linnet | 1 | 0 | 0 | 2 | 5 | 18 | 26 | 25 | 1 | 18 ( 1 Oct) | 40 | 4 | 3 May | 1 Oct | ||||
| Species | May | Jun | Jul | Aug | Sep | Oct | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 91. | Crossbill | 0 | 0 | 0 | 1 | 0 | 10 | 11 | 11 | 0 | 10 ( 1 Oct) | 20 | 2 | 20 Aug | 1 Oct | ||||
| 92. | Goldfinch | 0 | 0 | 0 | 1 | 34 | 10 | 45 | 44 | 1 | 20 (17 Sep) | 50 | 5 | 17 Aug | 1 Oct | ||||
| 93. | Siskin | 0 | 0 | 0 | 0 | 0 | 2 | 2 | 2 | 0 | 2 ( 1 Oct) | 10 | 1 | 1 Oct | 1 Oct | ||||
| 94. | Reed Bunting | 0 | 0 | 0 | 1 | 5 | 25 | 31 | 31 | 0 | 25 ( 1 Oct) | 40 | 4 | 17 Aug | 1 Oct | ||||
| Other species | |||||||||||||||||||
| Species | May | Jun | Jul | Aug | Sep | Oct | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 1. | Small Tortoiseshell | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 1 | 0 | 1 (17 Aug) | 10 | 1 | 17 Aug | 17 Aug | ||||
| 2. | European Peacock | 0 | 0 | 0 | 0 | 4 | 0 | 4 | 4 | 0 | 3 (18 Sep) | 20 | 2 | 11 Sep | 18 Sep | ||||
| 3. | Speckled Wood | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 1 | 0 | 1 (11 Sep) | 10 | 1 | 11 Sep | 11 Sep | ||||
| 4. | Large White | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 1 | 0 | 1 (11 Sep) | 10 | 1 | 11 Sep | 11 Sep | ||||
| 5. | Red Admiral | 0 | 0 | 0 | 0 | 2 | 5 | 7 | 7 | 0 | 4 ( 1 Oct) | 30 | 3 | 11 Sep | 18 Oct | ||||
| Species | May | Jun | Jul | Aug | Sep | Oct | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| Totals | 395 | 0 | 0 | 2382 | 5528 | 6130 | 14435 | 13784 | 651 | 100 | 10 | ||||||||
| Observation hours | 4:00 | 0:00 | 0:00 | 13:30 | 16:15 | 9:11 | 42:56 | ||||||||||||
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