Also present
Totals Fort Maarsseveen (Maarssen) 2018
| Species | Oct | Nov | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 1. | Greylag Goose | 97 | 71 | 168 | 168 | 0 | 71 (18 Nov) | 86 | 6 | 6 Oct | 18 Nov | ||||
| 2. | Tundra Bean Goose | 4 | 0 | 4 | 4 | 0 | 4 (28 Oct) | 14 | 1 | 28 Oct | 28 Oct | ||||
| 3. | Bean Goose sp. | 4 | 0 | 4 | 4 | 0 | 4 (28 Oct) | 14 | 1 | 28 Oct | 28 Oct | ||||
| 4. | Eurasian White-fronted Goose | 251 | 129 | 380 | 380 | 0 | 209 (28 Oct) | 71 | 5 | 6 Oct | 18 Nov | ||||
| 5. | Whooper Swan | 0 | 2 | 2 | 2 | 0 | 2 (18 Nov) | 14 | 1 | 18 Nov | 18 Nov | ||||
| 6. | Wigeon | 36 | 0 | 36 | 36 | 0 | 36 ( 6 Oct) | 14 | 1 | 6 Oct | 6 Oct | ||||
| 7. | Pochard | 2 | 0 | 2 | 2 | 0 | 2 ( 7 Oct) | 14 | 1 | 7 Oct | 7 Oct | ||||
| 8. | Stock Dove | 26 | 5 | 31 | 31 | 0 | 24 (28 Oct) | 43 | 3 | 6 Oct | 4 Nov | ||||
| 9. | Woodpigeon | 50 | 81 | 131 | 131 | 0 | 60 ( 4 Nov) | 71 | 5 | 6 Oct | 18 Nov | ||||
| 10. | Collared Dove | 1 | 0 | 1 | 1 | 0 | 1 ( 7 Oct) | 14 | 1 | 7 Oct | 7 Oct | ||||
| 11. | Lapwing | 250 | 110 | 360 | 334 | 26 | 139 (13 Oct) | 100 | 7 | 6 Oct | 18 Nov | ||||
| 12. | Snipe | 1 | 1 | 2 | 2 | 0 | 1 ( 6 Oct) | 29 | 2 | 6 Oct | 18 Nov | ||||
| 13. | Black-headed Gull | 2128 | 839 | 2967 | 2963 | 4 | 1505 (13 Oct) | 100 | 7 | 6 Oct | 18 Nov | ||||
| 14. | Lesser Black-backed Gull | 12 | 24 | 36 | 36 | 0 | 15 (18 Nov) | 57 | 4 | 6 Oct | 18 Nov | ||||
| 15. | Cormorant | 250 | 12 | 262 | 262 | 0 | 134 ( 7 Oct) | 100 | 7 | 6 Oct | 18 Nov | ||||
| 16. | Great White Egret | 8 | 0 | 8 | 8 | 0 | 4 ( 6 Oct) | 57 | 4 | 6 Oct | 28 Oct | ||||
| 17. | Grey Heron | 12 | 1 | 13 | 13 | 0 | 8 ( 7 Oct) | 43 | 3 | 7 Oct | 18 Nov | ||||
| 18. | Osprey | 1 | 0 | 1 | 1 | 0 | 1 ( 6 Oct) | 14 | 1 | 6 Oct | 6 Oct | ||||
| 19. | Sparrowhawk | 11 | 1 | 12 | 12 | 0 | 5 ( 6 Oct) | 57 | 4 | 6 Oct | 4 Nov | ||||
| 20. | Common Buzzard | 2 | 0 | 2 | 2 | 0 | 1 (13 Oct) | 29 | 2 | 13 Oct | 28 Oct | ||||
| 21. | Peregrine | 2 | 0 | 2 | 2 | 0 | 1 ( 6 Oct) | 29 | 2 | 6 Oct | 13 Oct | ||||
| 22. | Jay | 0 | 1 | 1 | 1 | 0 | 1 (18 Nov) | 14 | 1 | 18 Nov | 18 Nov | ||||
| 23. | Jackdaw | 3 | 0 | 3 | 3 | 0 | 3 (28 Oct) | 14 | 1 | 28 Oct | 28 Oct | ||||
| 24. | Blue Tit | 0 | 7 | 7 | 7 | 0 | 7 ( 4 Nov) | 14 | 1 | 4 Nov | 4 Nov | ||||
| 25. | Wood Lark | 1 | 0 | 1 | 1 | 0 | 1 ( 6 Oct) | 14 | 1 | 6 Oct | 6 Oct | ||||
| 26. | Skylark | 294 | 28 | 322 | 322 | 0 | 218 (13 Oct) | 86 | 6 | 6 Oct | 4 Nov | ||||
| 27. | Swallow | 10 | 0 | 10 | 10 | 0 | 10 ( 6 Oct) | 14 | 1 | 6 Oct | 6 Oct | ||||
| 28. | Chiffchaff | 1 | 0 | 1 | 1 | 0 | 1 (13 Oct) | 14 | 1 | 13 Oct | 13 Oct | ||||
| 29. | Starling | 1742 | 530 | 2272 | 2272 | 0 | 702 ( 6 Oct) | 100 | 7 | 6 Oct | 18 Nov | ||||
| 30. | Song Thrush | 155 | 1 | 156 | 156 | 0 | 97 ( 6 Oct) | 86 | 6 | 6 Oct | 4 Nov | ||||
| Species | Oct | Nov | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 31. | Mistle Thrush | 2 | 0 | 2 | 2 | 0 | 1 ( 6 Oct) | 29 | 2 | 6 Oct | 28 Oct | ||||
| 32. | Redwing | 193 | 4 | 197 | 189 | 8 | 94 (13 Oct) | 86 | 6 | 6 Oct | 4 Nov | ||||
| 33. | Blackbird | 1 | 2 | 3 | 3 | 0 | 2 (18 Nov) | 29 | 2 | 13 Oct | 18 Nov | ||||
| 34. | Fieldfare | 449 | 405 | 854 | 803 | 51 | 391 (28 Oct) | 100 | 7 | 6 Oct | 18 Nov | ||||
| 35. | Dunnock | 0 | 1 | 1 | 1 | 0 | 1 ( 4 Nov) | 14 | 1 | 4 Nov | 4 Nov | ||||
| 36. | Grey Wagtail | 3 | 0 | 3 | 3 | 0 | 2 ( 6 Oct) | 29 | 2 | 6 Oct | 13 Oct | ||||
| 37. | White Wagtail | 16 | 3 | 19 | 19 | 0 | 7 ( 6 Oct) | 86 | 6 | 6 Oct | 18 Nov | ||||
| 38. | Meadow Pipit | 320 | 5 | 325 | 325 | 0 | 182 ( 6 Oct) | 71 | 5 | 6 Oct | 4 Nov | ||||
| 39. | Chaffinch | 1384 | 105 | 1489 | 1483 | 6 | 572 (13 Oct) | 100 | 7 | 6 Oct | 18 Nov | ||||
| 40. | Brambling | 38 | 8 | 46 | 46 | 0 | 38 (28 Oct) | 43 | 3 | 28 Oct | 18 Nov | ||||
| 41. | Greenfinch | 17 | 0 | 17 | 17 | 0 | 8 (20 Oct) | 43 | 3 | 6 Oct | 20 Oct | ||||
| 42. | Linnet | 10 | 0 | 10 | 10 | 0 | 7 ( 6 Oct) | 29 | 2 | 6 Oct | 7 Oct | ||||
| 43. | Goldfinch | 20 | 2 | 22 | 22 | 0 | 20 (28 Oct) | 29 | 2 | 28 Oct | 4 Nov | ||||
| 44. | Siskin | 75 | 54 | 129 | 129 | 0 | 51 (13 Oct) | 86 | 6 | 6 Oct | 18 Nov | ||||
| 45. | Reed Bunting | 3 | 0 | 3 | 3 | 0 | 2 (13 Oct) | 29 | 2 | 7 Oct | 13 Oct | ||||
| Other species | |||||||||||||||
| Species | Oct | Nov | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 1. | Common Noctule | 12 | 0 | 12 | 12 | 0 | 7 ( 6 Oct) | 29 | 2 | 6 Oct | 13 Oct | ||||
| Species | Oct | Nov | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| Totals | 7897 | 2432 | 10329 | 10234 | 95 | 100 | 7 | ||||||||
| Observation hours | 15:05 | 4:30 | 19:35 | ||||||||||||
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