Also present
Totals Aetsveldsche polder, Nigtevecht 2016
| Species | Aug | Sep | Oct | Nov | Dec | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 1. | Canada Goose | 2 | 47 | 55 | 2 | 0 | 106 | 73 | 33 | 55 ( 1 Oct) | 38 | 6 | 19 Aug | 29 Nov | ||||
| 2. | Barnacle Goose | 0 | 68 | 0 | 481 | 358 | 907 | 806 | 101 | 307 (21 Dec) | 50 | 8 | 11 Sep | 21 Dec | ||||
| 3. | Greylag Goose | 1302 | 2051 | 620 | 565 | 117 | 4655 | 4526 | 129 | 1839 (11 Sep) | 94 | 15 | 17 Aug | 21 Dec | ||||
| 4. | goose sp. | 0 | 0 | 0 | 114 | 0 | 114 | 114 | 0 | 79 (29 Nov) | 13 | 2 | 29 Nov | 30 Nov | ||||
| 5. | Pink-footed Goose | 0 | 0 | 0 | 11 | 14 | 25 | 25 | 0 | 10 (13 Nov) | 25 | 4 | 13 Nov | 21 Dec | ||||
| 6. | Tundra Bean Goose | 0 | 0 | 14 | 102 | 98 | 214 | 186 | 28 | 69 ( 1 Dec) | 38 | 6 | 1 Oct | 21 Dec | ||||
| 7. | Eurasian White-fronted Goose | 0 | 1 | 4 | 4272 | 4932 | 9209 | 8895 | 314 | 3052 (21 Dec) | 56 | 9 | 18 Sep | 21 Dec | ||||
| 8. | Mute Swan | 2 | 1 | 0 | 0 | 0 | 3 | 2 | 1 | 2 (19 Aug) | 13 | 2 | 19 Aug | 11 Sep | ||||
| 9. | Whooper Swan | 0 | 0 | 0 | 1 | 0 | 1 | 1 | 0 | 1 (29 Nov) | 6 | 1 | 29 Nov | 29 Nov | ||||
| 10. | Egyptian Goose | 74 | 48 | 9 | 74 | 22 | 227 | 171 | 56 | 42 (20 Aug) | 75 | 12 | 17 Aug | 1 Dec | ||||
| 11. | Shelduck | 5 | 0 | 0 | 1 | 4 | 10 | 5 | 5 | 5 (17 Aug) | 19 | 3 | 17 Aug | 21 Dec | ||||
| 12. | Shoveler | 0 | 0 | 0 | 16 | 0 | 16 | 16 | 0 | 13 (14 Nov) | 13 | 2 | 14 Nov | 29 Nov | ||||
| 13. | Gadwall | 17 | 42 | 6 | 28 | 17 | 110 | 108 | 2 | 25 (18 Sep) | 81 | 13 | 17 Aug | 21 Dec | ||||
| 14. | Wigeon | 9 | 111 | 208 | 486 | 0 | 814 | 434 | 380 | 254 (13 Nov) | 44 | 7 | 17 Aug | 30 Nov | ||||
| 15. | Mallard | 13 | 12 | 19 | 20 | 3 | 67 | 63 | 4 | 19 ( 1 Oct) | 69 | 11 | 17 Aug | 21 Dec | ||||
| 16. | Pintail | 0 | 5 | 0 | 56 | 0 | 61 | 61 | 0 | 36 (13 Nov) | 19 | 3 | 11 Sep | 14 Nov | ||||
| 17. | Teal | 0 | 0 | 0 | 4 | 0 | 4 | 4 | 0 | 4 (13 Nov) | 6 | 1 | 13 Nov | 13 Nov | ||||
| 18. | Pochard | 4 | 0 | 0 | 0 | 0 | 4 | 4 | 0 | 4 (19 Aug) | 6 | 1 | 19 Aug | 19 Aug | ||||
| 19. | Swift | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 1 (20 Aug) | 6 | 1 | 20 Aug | 20 Aug | ||||
| 20. | Cuckoo | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 1 (17 Aug) | 6 | 1 | 17 Aug | 17 Aug | ||||
| 21. | Stock Dove | 1 | 12 | 4 | 19 | 3 | 39 | 35 | 4 | 12 (13 Nov) | 69 | 11 | 19 Aug | 21 Dec | ||||
| 22. | Woodpigeon | 1 | 33 | 16 | 536 | 198 | 784 | 770 | 14 | 339 (30 Nov) | 75 | 12 | 17 Aug | 21 Dec | ||||
| 23. | Collared Dove | 2 | 0 | 0 | 0 | 0 | 2 | 1 | 1 | 2 (20 Aug) | 6 | 1 | 20 Aug | 20 Aug | ||||
| 24. | Golden Plover | 122 | 108 | 32 | 199 | 658 | 1119 | 1115 | 4 | 549 (21 Dec) | 81 | 13 | 17 Aug | 21 Dec | ||||
| 25. | Lapwing | 44 | 219 | 42 | 1214 | 1176 | 2695 | 2535 | 160 | 939 (21 Dec) | 94 | 15 | 17 Aug | 21 Dec | ||||
| 26. | Whimbrel | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 1 (19 Aug) | 6 | 1 | 19 Aug | 19 Aug | ||||
| 27. | Curlew | 15 | 40 | 1 | 0 | 1 | 57 | 57 | 0 | 28 (11 Sep) | 44 | 7 | 20 Aug | 1 Dec | ||||
| 28. | Jack Snipe | 0 | 0 | 1 | 0 | 0 | 1 | 1 | 0 | 1 ( 1 Oct) | 6 | 1 | 1 Oct | 1 Oct | ||||
| 29. | Snipe | 70 | 104 | 13 | 0 | 5 | 192 | 192 | 0 | 77 (11 Sep) | 56 | 9 | 17 Aug | 1 Dec | ||||
| 30. | Green Sandpiper | 0 | 0 | 0 | 2 | 1 | 3 | 3 | 0 | 1 (14 Nov) | 19 | 3 | 14 Nov | 21 Dec | ||||
| Species | Aug | Sep | Oct | Nov | Dec | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 31. | Wood Sandpiper | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 1 (17 Aug) | 6 | 1 | 17 Aug | 17 Aug | ||||
| 32. | Redshank | 2 | 0 | 0 | 0 | 0 | 2 | 2 | 0 | 2 (20 Aug) | 6 | 1 | 20 Aug | 20 Aug | ||||
| 33. | Caspian Tern | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 1 (17 Aug) | 6 | 1 | 17 Aug | 17 Aug | ||||
| 34. | Common Tern | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 1 (20 Aug) | 6 | 1 | 20 Aug | 20 Aug | ||||
| 35. | Black-headed Gull | 84 | 326 | 53 | 191 | 11 | 665 | 655 | 10 | 195 (11 Sep) | 88 | 14 | 17 Aug | 1 Dec | ||||
| 36. | Common Gull | 8 | 12 | 8 | 181 | 17 | 226 | 222 | 4 | 74 (29 Nov) | 88 | 14 | 17 Aug | 21 Dec | ||||
| 37. | Caspian Gull | 0 | 0 | 0 | 1 | 2 | 3 | 3 | 0 | 2 (21 Dec) | 13 | 2 | 13 Nov | 21 Dec | ||||
| 38. | Herring Gull | 2 | 0 | 1 | 5 | 1 | 9 | 8 | 1 | 2 (29 Nov) | 44 | 7 | 17 Aug | 1 Dec | ||||
| 39. | Yellow-legged Gull | 0 | 1 | 0 | 0 | 0 | 1 | 1 | 0 | 1 ( 7 Sep) | 6 | 1 | 7 Sep | 7 Sep | ||||
| 40. | Great Black-backed Gull | 2 | 1 | 1 | 2 | 2 | 8 | 8 | 0 | 2 (21 Dec) | 44 | 7 | 19 Aug | 21 Dec | ||||
| 41. | Lesser Black-backed Gull | 13 | 17 | 2 | 4 | 0 | 36 | 34 | 2 | 8 (11 Sep) | 63 | 10 | 17 Aug | 29 Nov | ||||
| 42. | White Stork | 4 | 17 | 3 | 2 | 0 | 26 | 26 | 0 | 11 (11 Sep) | 31 | 5 | 17 Aug | 30 Nov | ||||
| 43. | Cormorant | 58 | 508 | 216 | 292 | 21 | 1095 | 1005 | 90 | 216 ( 1 Oct) | 88 | 14 | 17 Aug | 21 Dec | ||||
| 44. | Spoonbill | 2 | 9 | 0 | 0 | 0 | 11 | 9 | 2 | 9 (11 Sep) | 13 | 2 | 19 Aug | 11 Sep | ||||
| 45. | Great White Egret | 3 | 15 | 3 | 5 | 2 | 28 | 26 | 2 | 8 (17 Sep) | 75 | 12 | 17 Aug | 1 Dec | ||||
| 46. | Grey Heron | 7 | 4 | 15 | 0 | 1 | 27 | 26 | 1 | 15 ( 1 Oct) | 31 | 5 | 17 Aug | 1 Dec | ||||
| 47. | Purple Heron | 2 | 0 | 0 | 0 | 0 | 2 | 2 | 0 | 2 (20 Aug) | 6 | 1 | 20 Aug | 20 Aug | ||||
| 48. | Osprey | 0 | 4 | 1 | 0 | 0 | 5 | 5 | 0 | 3 (11 Sep) | 19 | 3 | 11 Sep | 1 Oct | ||||
| 49. | Sparrowhawk | 12 | 5 | 4 | 6 | 1 | 28 | 27 | 1 | 10 (17 Aug) | 63 | 10 | 17 Aug | 1 Dec | ||||
| 50. | Goshawk | 1 | 3 | 1 | 1 | 1 | 7 | 7 | 0 | 3 (11 Sep) | 31 | 5 | 20 Aug | 1 Dec | ||||
| 51. | Marsh Harrier | 13 | 8 | 9 | 0 | 0 | 30 | 30 | 0 | 9 ( 1 Oct) | 44 | 7 | 17 Aug | 1 Oct | ||||
| 52. | Hen Harrier | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 0 | 1 ( 1 Dec) | 6 | 1 | 1 Dec | 1 Dec | ||||
| 53. | Common Buzzard | 10 | 36 | 9 | 1 | 1 | 57 | 57 | 0 | 24 (11 Sep) | 44 | 7 | 17 Aug | 1 Dec | ||||
| 54. | Great Spotted Woodpecker | 0 | 1 | 1 | 0 | 1 | 3 | 3 | 0 | 1 (18 Sep) | 19 | 3 | 18 Sep | 1 Dec | ||||
| 55. | Kestrel | 5 | 3 | 0 | 0 | 0 | 8 | 6 | 2 | 3 (17 Aug) | 19 | 3 | 17 Aug | 11 Sep | ||||
| 56. | falcon sp. | 0 | 0 | 1 | 0 | 0 | 1 | 1 | 0 | 1 ( 1 Oct) | 6 | 1 | 1 Oct | 1 Oct | ||||
| 57. | Merlin | 0 | 1 | 0 | 0 | 0 | 1 | 1 | 0 | 1 (11 Sep) | 6 | 1 | 11 Sep | 11 Sep | ||||
| 58. | Hobby | 5 | 7 | 0 | 0 | 0 | 12 | 12 | 0 | 5 (11 Sep) | 25 | 4 | 17 Aug | 17 Sep | ||||
| 59. | Peregrine | 2 | 7 | 0 | 1 | 0 | 10 | 10 | 0 | 6 (18 Sep) | 25 | 4 | 17 Aug | 30 Nov | ||||
| 60. | Alexandrine Parakeet | 0 | 0 | 0 | 4 | 0 | 4 | 0 | 4 | 4 (14 Nov) | 6 | 1 | 14 Nov | 14 Nov | ||||
| Species | Aug | Sep | Oct | Nov | Dec | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 61. | Rose-ringed Parakeet | 12 | 24 | 47 | 52 | 43 | 178 | 168 | 10 | 47 ( 1 Oct) | 63 | 10 | 17 Aug | 21 Dec | ||||
| 62. | Magpie | 2 | 1 | 0 | 1 | 0 | 4 | 4 | 0 | 2 (17 Aug) | 19 | 3 | 17 Aug | 14 Nov | ||||
| 63. | Jackdaw | 217 | 503 | 210 | 750 | 18 | 1698 | 1009 | 689 | 693 (13 Nov) | 88 | 14 | 17 Aug | 1 Dec | ||||
| 64. | Rook | 0 | 9 | 0 | 3 | 3 | 15 | 12 | 3 | 4 ( 7 Sep) | 44 | 7 | 7 Sep | 1 Dec | ||||
| 65. | Carrion Crow | 1 | 1 | 3 | 0 | 0 | 5 | 5 | 0 | 3 ( 1 Oct) | 19 | 3 | 17 Aug | 1 Oct | ||||
| 66. | Raven | 0 | 1 | 0 | 8 | 0 | 9 | 6 | 3 | 5 (30 Nov) | 25 | 4 | 17 Sep | 30 Nov | ||||
| 67. | Blue Tit | 0 | 0 | 0 | 1 | 1 | 2 | 1 | 1 | 1 (29 Nov) | 13 | 2 | 29 Nov | 1 Dec | ||||
| 68. | Great Tit | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 1 (20 Aug) | 6 | 1 | 20 Aug | 20 Aug | ||||
| 69. | Skylark | 0 | 0 | 5 | 172 | 2 | 179 | 177 | 2 | 93 (30 Nov) | 44 | 7 | 1 Oct | 1 Dec | ||||
| 70. | Sand Martin | 2 | 15 | 0 | 0 | 0 | 17 | 17 | 0 | 15 ( 7 Sep) | 13 | 2 | 17 Aug | 7 Sep | ||||
| 71. | Swallow | 26 | 489 | 8 | 0 | 0 | 523 | 523 | 0 | 440 (11 Sep) | 50 | 8 | 17 Aug | 1 Oct | ||||
| 72. | House Martin | 2 | 0 | 0 | 0 | 0 | 2 | 2 | 0 | 1 (17 Aug) | 13 | 2 | 17 Aug | 19 Aug | ||||
| 73. | Willow Warbler | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 1 (20 Aug) | 6 | 1 | 20 Aug | 20 Aug | ||||
| 74. | Chiffchaff | 0 | 1 | 0 | 1 | 0 | 2 | 2 | 0 | 1 (18 Sep) | 13 | 2 | 18 Sep | 13 Nov | ||||
| 75. | Starling | 126 | 359 | 1240 | 11503 | 3198 | 16426 | 15853 | 573 | 8859 (14 Nov) | 94 | 15 | 17 Aug | 21 Dec | ||||
| 76. | Song Thrush | 0 | 1 | 2 | 3 | 0 | 6 | 6 | 0 | 3 (13 Nov) | 19 | 3 | 17 Sep | 13 Nov | ||||
| 77. | Mistle Thrush | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 1 (17 Aug) | 6 | 1 | 17 Aug | 17 Aug | ||||
| 78. | Redwing | 0 | 0 | 0 | 758 | 1 | 759 | 759 | 0 | 723 (13 Nov) | 25 | 4 | 13 Nov | 1 Dec | ||||
| 79. | Blackbird | 0 | 0 | 0 | 2 | 0 | 2 | 2 | 0 | 2 (13 Nov) | 6 | 1 | 13 Nov | 13 Nov | ||||
| 80. | Fieldfare | 0 | 1 | 0 | 32 | 2 | 35 | 35 | 0 | 17 (13 Nov) | 31 | 5 | 18 Sep | 21 Dec | ||||
| 81. | Whinchat | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 1 (17 Aug) | 6 | 1 | 17 Aug | 17 Aug | ||||
| 82. | Tree Sparrow | 0 | 4 | 15 | 0 | 0 | 19 | 19 | 0 | 15 ( 1 Oct) | 13 | 2 | 7 Sep | 1 Oct | ||||
| 83. | Blue-headed Wagtail | 40 | 35 | 4 | 0 | 0 | 79 | 78 | 1 | 19 (19 Aug) | 50 | 8 | 17 Aug | 1 Oct | ||||
| 84. | Grey Wagtail | 0 | 1 | 8 | 9 | 3 | 21 | 19 | 2 | 7 ( 1 Oct) | 50 | 8 | 11 Sep | 21 Dec | ||||
| 85. | White Wagtail | 9 | 13 | 18 | 2 | 0 | 42 | 42 | 0 | 18 ( 1 Oct) | 56 | 9 | 17 Aug | 13 Nov | ||||
| 86. | Meadow Pipit | 0 | 116 | 2870 | 26 | 5 | 3017 | 3017 | 0 | 2865 ( 1 Oct) | 50 | 8 | 17 Sep | 1 Dec | ||||
| 87. | Tree Pipit | 2 | 1 | 1 | 0 | 0 | 4 | 4 | 0 | 1 (17 Aug) | 25 | 4 | 17 Aug | 1 Oct | ||||
| 88. | Water Pipit | 0 | 0 | 1 | 0 | 0 | 1 | 1 | 0 | 1 ( 1 Oct) | 6 | 1 | 1 Oct | 1 Oct | ||||
| 89. | Chaffinch | 0 | 11 | 230 | 39 | 16 | 296 | 296 | 0 | 230 ( 1 Oct) | 69 | 11 | 11 Sep | 21 Dec | ||||
| 90. | Brambling | 0 | 0 | 1 | 10 | 1 | 12 | 12 | 0 | 7 (29 Nov) | 31 | 5 | 1 Oct | 1 Dec | ||||
| Species | Aug | Sep | Oct | Nov | Dec | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 91. | Chaffinch/Brambling | 0 | 0 | 0 | 54 | 20 | 74 | 74 | 0 | 38 (29 Nov) | 19 | 3 | 13 Nov | 1 Dec | ||||
| 92. | Bullfinch | 0 | 0 | 1 | 0 | 0 | 1 | 1 | 0 | 1 ( 1 Oct) | 6 | 1 | 1 Oct | 1 Oct | ||||
| 93. | Greenfinch | 9 | 3 | 24 | 2 | 1 | 39 | 34 | 5 | 24 ( 1 Oct) | 50 | 8 | 17 Aug | 1 Dec | ||||
| 94. | Linnet | 2 | 5 | 18 | 5 | 1 | 31 | 31 | 0 | 18 ( 1 Oct) | 31 | 5 | 17 Aug | 1 Dec | ||||
| 95. | Crossbill | 1 | 0 | 10 | 0 | 0 | 11 | 11 | 0 | 10 ( 1 Oct) | 13 | 2 | 20 Aug | 1 Oct | ||||
| 96. | Goldfinch | 1 | 34 | 10 | 2 | 0 | 47 | 46 | 1 | 20 (17 Sep) | 44 | 7 | 17 Aug | 30 Nov | ||||
| 97. | Siskin | 0 | 0 | 2 | 1 | 4 | 7 | 7 | 0 | 4 ( 1 Dec) | 19 | 3 | 1 Oct | 1 Dec | ||||
| 98. | Reed Bunting | 1 | 5 | 25 | 1 | 0 | 32 | 32 | 0 | 25 ( 1 Oct) | 31 | 5 | 17 Aug | 14 Nov | ||||
| 99. | passerine sp. | 0 | 0 | 0 | 1 | 0 | 1 | 1 | 0 | 1 (29 Nov) | 6 | 1 | 29 Nov | 29 Nov | ||||
| Other species | ||||||||||||||||||
| Species | Aug | Sep | Oct | Nov | Dec | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 1. | Small Tortoiseshell | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 1 (17 Aug) | 6 | 1 | 17 Aug | 17 Aug | ||||
| 2. | European Peacock | 0 | 4 | 0 | 0 | 0 | 4 | 4 | 0 | 3 (18 Sep) | 13 | 2 | 11 Sep | 18 Sep | ||||
| 3. | Speckled Wood | 0 | 1 | 0 | 0 | 0 | 1 | 1 | 0 | 1 (11 Sep) | 6 | 1 | 11 Sep | 11 Sep | ||||
| 4. | Large White | 0 | 1 | 0 | 0 | 0 | 1 | 1 | 0 | 1 (11 Sep) | 6 | 1 | 11 Sep | 11 Sep | ||||
| 5. | Red Admiral | 0 | 2 | 5 | 0 | 0 | 7 | 7 | 0 | 4 ( 1 Oct) | 19 | 3 | 11 Sep | 18 Oct | ||||
| Species | Aug | Sep | Oct | Nov | Dec | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| Totals | 2382 | 5528 | 6130 | 22337 | 10988 | 47365 | 44720 | 2645 | 100 | 16 | ||||||||
| Observation hours | 13:30 | 16:15 | 9:11 | 13:55 | 5:30 | 58:21 | ||||||||||||
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