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 | 41 | 0 | 0 | 2 | 47 | 55 | 145 | 71 | 74 | 55 ( 1 Oct) | 44 | 7 | 20 May | 1 Oct | ||||
| 2. | Barnacle Goose | 51 | 0 | 0 | 0 | 68 | 0 | 119 | 78 | 41 | 61 (11 Sep) | 56 | 9 | 11 May | 17 Sep | ||||
| 3. | Lesser Canada Goose | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 1 (29 May) | 6 | 1 | 29 May | 29 May | ||||
| 4. | Greylag Goose | 962 | 0 | 0 | 1302 | 2051 | 620 | 4935 | 3937 | 998 | 1839 (11 Sep) | 94 | 15 | 11 May | 1 Oct | ||||
| 5. | goose sp. | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 1 (29 May) | 6 | 1 | 29 May | 29 May | ||||
| 6. | Domestic Goose | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 1 (31 May) | 6 | 1 | 31 May | 31 May | ||||
| 7. | Tundra Bean Goose | 0 | 0 | 0 | 0 | 0 | 14 | 14 | 14 | 0 | 14 ( 1 Oct) | 6 | 1 | 1 Oct | 1 Oct | ||||
| 8. | Eurasian White-fronted Goose | 0 | 0 | 0 | 0 | 1 | 4 | 5 | 4 | 1 | 4 (18 Oct) | 13 | 2 | 18 Sep | 18 Oct | ||||
| 9. | Mute Swan | 16 | 0 | 0 | 2 | 1 | 0 | 19 | 2 | 17 | 8 (12 May) | 38 | 6 | 12 May | 11 Sep | ||||
| 10. | Egyptian Goose | 32 | 0 | 0 | 74 | 48 | 9 | 163 | 137 | 26 | 42 (20 Aug) | 75 | 12 | 11 May | 1 Oct | ||||
| 11. | Shelduck | 8 | 0 | 0 | 5 | 0 | 0 | 13 | 2 | 11 | 5 (17 Aug) | 38 | 6 | 12 May | 17 Aug | ||||
| 12. | Shoveler | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 1 (31 May) | 6 | 1 | 31 May | 31 May | ||||
| 13. | Gadwall | 20 | 0 | 0 | 17 | 42 | 6 | 85 | 78 | 7 | 25 (18 Sep) | 81 | 13 | 11 May | 1 Oct | ||||
| 14. | Wigeon | 0 | 0 | 0 | 9 | 111 | 208 | 328 | 328 | 0 | 208 ( 1 Oct) | 25 | 4 | 17 Aug | 1 Oct | ||||
| 15. | Mallard | 3 | 0 | 0 | 13 | 12 | 19 | 47 | 45 | 2 | 19 ( 1 Oct) | 50 | 8 | 11 May | 1 Oct | ||||
| 16. | Pintail | 0 | 0 | 0 | 0 | 5 | 0 | 5 | 5 | 0 | 5 (11 Sep) | 6 | 1 | 11 Sep | 11 Sep | ||||
| 17. | Pochard | 0 | 0 | 0 | 4 | 0 | 0 | 4 | 4 | 0 | 4 (19 Aug) | 6 | 1 | 19 Aug | 19 Aug | ||||
| 18. | Tufted Duck | 11 | 0 | 0 | 0 | 0 | 0 | 11 | 6 | 5 | 5 (12 May) | 25 | 4 | 11 May | 19 May | ||||
| 19. | Swift | 67 | 0 | 0 | 1 | 0 | 0 | 68 | 10 | 58 | 48 (11 May) | 38 | 6 | 11 May | 20 Aug | ||||
| 20. | Cuckoo | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 1 | 0 | 1 (17 Aug) | 6 | 1 | 17 Aug | 17 Aug | ||||
| 21. | Feral Pigeon | 45 | 0 | 0 | 0 | 0 | 0 | 45 | 3 | 42 | 22 (12 May) | 19 | 3 | 12 May | 31 May | ||||
| 22. | Stock Dove | 6 | 0 | 0 | 1 | 12 | 4 | 23 | 20 | 3 | 4 ( 7 Sep) | 69 | 11 | 11 May | 1 Oct | ||||
| 23. | Woodpigeon | 17 | 0 | 0 | 1 | 33 | 16 | 67 | 53 | 14 | 20 (11 Sep) | 69 | 11 | 11 May | 1 Oct | ||||
| 24. | Collared Dove | 2 | 0 | 0 | 2 | 0 | 0 | 4 | 3 | 1 | 2 (12 May) | 13 | 2 | 12 May | 20 Aug | ||||
| 25. | Oystercatcher | 12 | 0 | 0 | 0 | 0 | 0 | 12 | 11 | 1 | 7 (12 May) | 19 | 3 | 11 May | 13 May | ||||
| 26. | Golden Plover | 0 | 0 | 0 | 122 | 108 | 32 | 262 | 262 | 0 | 121 (17 Aug) | 38 | 6 | 17 Aug | 1 Oct | ||||
| 27. | Lapwing | 19 | 0 | 0 | 44 | 219 | 42 | 324 | 301 | 23 | 190 (18 Sep) | 81 | 13 | 11 May | 1 Oct | ||||
| 28. | Whimbrel | 4 | 0 | 0 | 1 | 0 | 0 | 5 | 1 | 4 | 4 (11 May) | 13 | 2 | 11 May | 19 Aug | ||||
| 29. | Curlew | 0 | 0 | 0 | 15 | 40 | 1 | 56 | 56 | 0 | 28 (11 Sep) | 38 | 6 | 20 Aug | 1 Oct | ||||
| 30. | Bar-tailed Godwit | 2 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 2 | 2 (31 May) | 6 | 1 | 31 May | 31 May | ||||
| Species | May | Jun | Jul | Aug | Sep | Oct | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 31. | Black-tailed Godwit | 3 | 0 | 0 | 0 | 0 | 0 | 3 | 0 | 3 | 3 (19 May) | 6 | 1 | 19 May | 19 May | ||||
| 32. | Jack Snipe | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 0 | 1 ( 1 Oct) | 6 | 1 | 1 Oct | 1 Oct | ||||
| 33. | Snipe | 0 | 0 | 0 | 70 | 104 | 13 | 187 | 187 | 0 | 77 (11 Sep) | 50 | 8 | 17 Aug | 1 Oct | ||||
| 34. | Wood Sandpiper | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 1 | 0 | 1 (17 Aug) | 6 | 1 | 17 Aug | 17 Aug | ||||
| 35. | Redshank | 5 | 0 | 0 | 2 | 0 | 0 | 7 | 3 | 4 | 3 (31 May) | 25 | 4 | 19 May | 20 Aug | ||||
| 36. | Caspian Tern | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 1 | 0 | 1 (17 Aug) | 6 | 1 | 17 Aug | 17 Aug | ||||
| 37. | Common Tern | 2 | 0 | 0 | 1 | 0 | 0 | 3 | 1 | 2 | 1 (11 May) | 19 | 3 | 11 May | 20 Aug | ||||
| 38. | Black-headed Gull | 16 | 0 | 0 | 84 | 326 | 53 | 479 | 464 | 15 | 195 (11 Sep) | 81 | 13 | 11 May | 1 Oct | ||||
| 39. | Common Gull | 1 | 0 | 0 | 8 | 12 | 8 | 29 | 29 | 0 | 8 ( 1 Oct) | 50 | 8 | 31 May | 1 Oct | ||||
| 40. | Caspian Gull | 3 | 0 | 0 | 0 | 0 | 0 | 3 | 0 | 3 | 1 (19 May) | 19 | 3 | 19 May | 31 May | ||||
| 41. | Herring Gull | 2 | 0 | 0 | 2 | 0 | 1 | 5 | 3 | 2 | 1 (11 May) | 31 | 5 | 11 May | 1 Oct | ||||
| 42. | Yellow-legged Gull | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 1 | 0 | 1 ( 7 Sep) | 6 | 1 | 7 Sep | 7 Sep | ||||
| 43. | Great Black-backed Gull | 0 | 0 | 0 | 2 | 1 | 1 | 4 | 4 | 0 | 1 (19 Aug) | 25 | 4 | 19 Aug | 1 Oct | ||||
| 44. | Lesser Black-backed Gull | 28 | 0 | 0 | 13 | 17 | 2 | 60 | 32 | 28 | 11 (31 May) | 75 | 12 | 11 May | 1 Oct | ||||
| 45. | White Stork | 3 | 0 | 0 | 4 | 17 | 3 | 27 | 24 | 3 | 11 (11 Sep) | 31 | 5 | 11 May | 1 Oct | ||||
| 46. | Cormorant | 48 | 0 | 0 | 58 | 508 | 216 | 830 | 734 | 96 | 216 ( 1 Oct) | 94 | 15 | 11 May | 1 Oct | ||||
| 47. | Spoonbill | 12 | 0 | 0 | 2 | 9 | 0 | 23 | 12 | 11 | 9 (11 Sep) | 38 | 6 | 11 May | 11 Sep | ||||
| 48. | Great White Egret | 13 | 0 | 0 | 3 | 15 | 3 | 34 | 24 | 10 | 10 (11 May) | 69 | 11 | 11 May | 1 Oct | ||||
| 49. | Grey Heron | 0 | 0 | 0 | 7 | 4 | 15 | 26 | 25 | 1 | 15 ( 1 Oct) | 25 | 4 | 17 Aug | 1 Oct | ||||
| 50. | Purple Heron | 5 | 0 | 0 | 2 | 0 | 0 | 7 | 4 | 3 | 3 (11 May) | 19 | 3 | 11 May | 20 Aug | ||||
| 51. | Osprey | 0 | 0 | 0 | 0 | 4 | 1 | 5 | 5 | 0 | 3 (11 Sep) | 19 | 3 | 11 Sep | 1 Oct | ||||
| 52. | Honey Buzzard | 2 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 2 | 2 (11 May) | 6 | 1 | 11 May | 11 May | ||||
| 53. | Sparrowhawk | 2 | 0 | 0 | 12 | 5 | 4 | 23 | 21 | 2 | 10 (17 Aug) | 44 | 7 | 11 May | 1 Oct | ||||
| 54. | Goshawk | 0 | 0 | 0 | 1 | 3 | 1 | 5 | 5 | 0 | 3 (11 Sep) | 19 | 3 | 20 Aug | 1 Oct | ||||
| 55. | Marsh Harrier | 8 | 0 | 0 | 13 | 8 | 9 | 38 | 32 | 6 | 9 ( 1 Oct) | 56 | 9 | 11 May | 1 Oct | ||||
| 56. | Hen Harrier | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 1 (11 May) | 6 | 1 | 11 May | 11 May | ||||
| 57. | Black Kite | 2 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 2 | 1 (11 May) | 13 | 2 | 11 May | 12 May | ||||
| 58. | White-tailed Eagle | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 1 (11 May) | 6 | 1 | 11 May | 11 May | ||||
| 59. | Common Buzzard | 3 | 0 | 0 | 10 | 36 | 9 | 58 | 55 | 3 | 24 (11 Sep) | 38 | 6 | 11 May | 1 Oct | ||||
| 60. | European Bee-eater | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 1 (11 May) | 6 | 1 | 11 May | 11 May | ||||
| Species | May | Jun | Jul | Aug | Sep | Oct | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 61. | Great Spotted Woodpecker | 0 | 0 | 0 | 0 | 1 | 1 | 2 | 2 | 0 | 1 (18 Sep) | 13 | 2 | 18 Sep | 1 Oct | ||||
| 62. | Kestrel | 3 | 0 | 0 | 5 | 3 | 0 | 11 | 6 | 5 | 3 (11 May) | 25 | 4 | 11 May | 11 Sep | ||||
| 63. | falcon sp. | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 0 | 1 ( 1 Oct) | 6 | 1 | 1 Oct | 1 Oct | ||||
| 64. | Merlin | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 1 | 0 | 1 (11 Sep) | 6 | 1 | 11 Sep | 11 Sep | ||||
| 65. | Hobby | 3 | 0 | 0 | 5 | 7 | 0 | 15 | 13 | 2 | 5 (11 Sep) | 38 | 6 | 11 May | 17 Sep | ||||
| 66. | Peregrine | 0 | 0 | 0 | 2 | 7 | 0 | 9 | 9 | 0 | 6 (18 Sep) | 19 | 3 | 17 Aug | 18 Sep | ||||
| 67. | Alexandrine Parakeet | 23 | 0 | 0 | 0 | 0 | 0 | 23 | 0 | 23 | 14 (31 May) | 19 | 3 | 19 May | 31 May | ||||
| 68. | Rose-ringed Parakeet | 5 | 0 | 0 | 12 | 24 | 47 | 88 | 84 | 4 | 47 ( 1 Oct) | 56 | 9 | 11 May | 1 Oct | ||||
| 69. | Magpie | 0 | 0 | 0 | 2 | 1 | 0 | 3 | 3 | 0 | 2 (17 Aug) | 13 | 2 | 17 Aug | 7 Sep | ||||
| 70. | Jackdaw | 36 | 0 | 0 | 217 | 503 | 210 | 966 | 891 | 75 | 229 ( 7 Sep) | 88 | 14 | 11 May | 1 Oct | ||||
| 71. | Rook | 2 | 0 | 0 | 0 | 9 | 0 | 11 | 9 | 2 | 4 ( 7 Sep) | 25 | 4 | 12 May | 17 Sep | ||||
| 72. | Carrion Crow | 0 | 0 | 0 | 1 | 1 | 3 | 5 | 5 | 0 | 3 ( 1 Oct) | 19 | 3 | 17 Aug | 1 Oct | ||||
| 73. | Raven | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 1 | 1 (17 Sep) | 6 | 1 | 17 Sep | 17 Sep | ||||
| 74. | Great Tit | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 1 | 0 | 1 (20 Aug) | 6 | 1 | 20 Aug | 20 Aug | ||||
| 75. | Wood Lark | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 1 (13 May) | 6 | 1 | 13 May | 13 May | ||||
| 76. | Skylark | 0 | 0 | 0 | 0 | 0 | 5 | 5 | 5 | 0 | 4 (18 Oct) | 13 | 2 | 1 Oct | 18 Oct | ||||
| 77. | Sand Martin | 0 | 0 | 0 | 2 | 15 | 0 | 17 | 17 | 0 | 15 ( 7 Sep) | 13 | 2 | 17 Aug | 7 Sep | ||||
| 78. | Swallow | 34 | 0 | 0 | 26 | 489 | 8 | 557 | 527 | 30 | 440 (11 Sep) | 94 | 15 | 11 May | 1 Oct | ||||
| 79. | House Martin | 4 | 0 | 0 | 2 | 0 | 0 | 6 | 2 | 4 | 2 (11 May) | 25 | 4 | 11 May | 19 Aug | ||||
| 80. | Willow Warbler | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 1 | 0 | 1 (20 Aug) | 6 | 1 | 20 Aug | 20 Aug | ||||
| 81. | Chiffchaff | 1 | 0 | 0 | 0 | 1 | 0 | 2 | 1 | 1 | 1 (11 May) | 13 | 2 | 11 May | 18 Sep | ||||
| 82. | Starling | 15 | 0 | 0 | 126 | 359 | 1240 | 1740 | 1736 | 4 | 1240 ( 1 Oct) | 69 | 11 | 19 May | 1 Oct | ||||
| 83. | Song Thrush | 0 | 0 | 0 | 0 | 1 | 2 | 3 | 3 | 0 | 2 ( 1 Oct) | 13 | 2 | 17 Sep | 1 Oct | ||||
| 84. | Mistle Thrush | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 1 | 0 | 1 (17 Aug) | 6 | 1 | 17 Aug | 17 Aug | ||||
| 85. | Fieldfare | 1 | 0 | 0 | 0 | 1 | 0 | 2 | 1 | 1 | 1 (11 May) | 13 | 2 | 11 May | 18 Sep | ||||
| 86. | Spotted Flycatcher | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 1 (11 May) | 6 | 1 | 11 May | 11 May | ||||
| 87. | Whinchat | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 1 | 0 | 1 (17 Aug) | 6 | 1 | 17 Aug | 17 Aug | ||||
| 88. | Wheatear | 3 | 0 | 0 | 0 | 0 | 0 | 3 | 0 | 3 | 3 (11 May) | 6 | 1 | 11 May | 11 May | ||||
| 89. | Tree Sparrow | 0 | 0 | 0 | 0 | 4 | 15 | 19 | 19 | 0 | 15 ( 1 Oct) | 13 | 2 | 7 Sep | 1 Oct | ||||
| 90. | Blue-headed Wagtail | 0 | 0 | 0 | 40 | 35 | 4 | 79 | 78 | 1 | 19 (19 Aug) | 50 | 8 | 17 Aug | 1 Oct | ||||
| Species | May | Jun | Jul | Aug | Sep | Oct | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 91. | Grey-headed Wagtail | 4 | 0 | 0 | 0 | 0 | 0 | 4 | 0 | 4 | 3 (12 May) | 13 | 2 | 11 May | 12 May | ||||
| 92. | Yellow wagtail sp. | 6 | 0 | 0 | 0 | 0 | 0 | 6 | 0 | 6 | 4 (13 May) | 13 | 2 | 12 May | 13 May | ||||
| 93. | Grey Wagtail | 0 | 0 | 0 | 0 | 1 | 8 | 9 | 9 | 0 | 7 ( 1 Oct) | 19 | 3 | 11 Sep | 18 Oct | ||||
| 94. | White Wagtail | 5 | 0 | 0 | 9 | 13 | 18 | 45 | 42 | 3 | 18 ( 1 Oct) | 63 | 10 | 12 May | 1 Oct | ||||
| 95. | Meadow Pipit | 1 | 0 | 0 | 0 | 116 | 2870 | 2987 | 2987 | 0 | 2865 ( 1 Oct) | 31 | 5 | 31 May | 18 Oct | ||||
| 96. | Tree Pipit | 1 | 0 | 0 | 2 | 1 | 1 | 5 | 4 | 1 | 1 (12 May) | 31 | 5 | 12 May | 1 Oct | ||||
| 97. | Water Pipit | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 0 | 1 ( 1 Oct) | 6 | 1 | 1 Oct | 1 Oct | ||||
| 98. | Chaffinch | 3 | 0 | 0 | 0 | 11 | 230 | 244 | 244 | 0 | 230 ( 1 Oct) | 31 | 5 | 13 May | 1 Oct | ||||
| 99. | Brambling | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 0 | 1 ( 1 Oct) | 6 | 1 | 1 Oct | 1 Oct | ||||
| 100. | Bullfinch | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 0 | 1 ( 1 Oct) | 6 | 1 | 1 Oct | 1 Oct | ||||
| 101. | Greenfinch | 0 | 0 | 0 | 9 | 3 | 24 | 36 | 31 | 5 | 24 ( 1 Oct) | 38 | 6 | 17 Aug | 1 Oct | ||||
| 102. | Linnet | 0 | 0 | 0 | 2 | 5 | 18 | 25 | 25 | 0 | 18 ( 1 Oct) | 19 | 3 | 17 Aug | 1 Oct | ||||
| 103. | Crossbill | 0 | 0 | 0 | 1 | 0 | 10 | 11 | 11 | 0 | 10 ( 1 Oct) | 13 | 2 | 20 Aug | 1 Oct | ||||
| 104. | Goldfinch | 3 | 0 | 0 | 1 | 34 | 10 | 48 | 44 | 4 | 20 (17 Sep) | 44 | 7 | 12 May | 1 Oct | ||||
| 105. | Siskin | 0 | 0 | 0 | 0 | 0 | 2 | 2 | 2 | 0 | 2 ( 1 Oct) | 6 | 1 | 1 Oct | 1 Oct | ||||
| 106. | Reed Bunting | 0 | 0 | 0 | 1 | 5 | 25 | 31 | 31 | 0 | 25 ( 1 Oct) | 25 | 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 | 1 | 0 | 0 | 1 | 0 | 0 | 2 | 2 | 0 | 1 (11 May) | 13 | 2 | 11 May | 17 Aug | ||||
| 2. | European Peacock | 0 | 0 | 0 | 0 | 4 | 0 | 4 | 4 | 0 | 3 (18 Sep) | 13 | 2 | 11 Sep | 18 Sep | ||||
| 3. | Speckled Wood | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 1 | 0 | 1 (11 Sep) | 6 | 1 | 11 Sep | 11 Sep | ||||
| 4. | Large White | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 1 | 0 | 1 (11 Sep) | 6 | 1 | 11 Sep | 11 Sep | ||||
| 5. | Red Admiral | 1 | 0 | 0 | 0 | 2 | 5 | 8 | 7 | 1 | 4 ( 1 Oct) | 25 | 4 | 11 May | 18 Oct | ||||
| Species | May | Jun | Jul | Aug | Sep | Oct | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| Totals | 1640 | 0 | 0 | 2382 | 5528 | 6130 | 15680 | 13968 | 1712 | 100 | 16 | ||||||||
| Observation hours | 19:21 | 0:00 | 0:00 | 13:30 | 16:15 | 9:11 | 58:17 | ||||||||||||
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