Also present
Totals Fort Maarsseveen (Maarssen) 2020
| Species | Sep | Oct | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 1. | Canada Goose | 32 | 0 | 32 | 32 | 0 | 20 ( 5 Sep) | 50 | 2 | 5 Sep | 20 Sep | ||||
| 2. | Greylag Goose | 300 | 87 | 387 | 387 | 0 | 189 (12 Sep) | 75 | 3 | 5 Sep | 10 Oct | ||||
| 3. | Eurasian White-fronted Goose | 2 | 121 | 123 | 123 | 0 | 121 (10 Oct) | 50 | 2 | 20 Sep | 10 Oct | ||||
| 4. | Egyptian Goose | 2 | 0 | 2 | 2 | 0 | 2 (20 Sep) | 25 | 1 | 20 Sep | 20 Sep | ||||
| 5. | Gadwall | 5 | 0 | 5 | 5 | 0 | 5 (20 Sep) | 25 | 1 | 20 Sep | 20 Sep | ||||
| 6. | Wigeon | 22 | 0 | 22 | 22 | 0 | 22 (20 Sep) | 25 | 1 | 20 Sep | 20 Sep | ||||
| 7. | Mallard | 6 | 0 | 6 | 6 | 0 | 4 ( 5 Sep) | 50 | 2 | 5 Sep | 12 Sep | ||||
| 8. | Pintail | 0 | 25 | 25 | 25 | 0 | 25 (10 Oct) | 25 | 1 | 10 Oct | 10 Oct | ||||
| 9. | Woodpigeon | 5 | 0 | 5 | 0 | 5 | 5 ( 5 Sep) | 25 | 1 | 5 Sep | 5 Sep | ||||
| 10. | Lapwing | 480 | 898 | 1378 | 1143 | 235 | 898 (10 Oct) | 100 | 4 | 5 Sep | 10 Oct | ||||
| 11. | Snipe | 10 | 0 | 10 | 10 | 0 | 10 (12 Sep) | 25 | 1 | 12 Sep | 12 Sep | ||||
| 12. | Green Sandpiper | 1 | 0 | 1 | 1 | 0 | 1 ( 5 Sep) | 25 | 1 | 5 Sep | 5 Sep | ||||
| 13. | Greenshank | 4 | 0 | 4 | 4 | 0 | 3 (20 Sep) | 50 | 2 | 12 Sep | 20 Sep | ||||
| 14. | Black-headed Gull | 240 | 150 | 390 | 390 | 0 | 240 (12 Sep) | 50 | 2 | 12 Sep | 10 Oct | ||||
| 15. | Lesser Black-backed Gull | 3 | 0 | 3 | 3 | 0 | 3 (20 Sep) | 25 | 1 | 20 Sep | 20 Sep | ||||
| 16. | White Stork | 2 | 0 | 2 | 2 | 0 | 2 ( 5 Sep) | 25 | 1 | 5 Sep | 5 Sep | ||||
| 17. | Cormorant | 30 | 30 | 60 | 60 | 0 | 30 (10 Oct) | 100 | 4 | 5 Sep | 10 Oct | ||||
| 18. | Great White Egret | 11 | 1 | 12 | 12 | 0 | 7 (12 Sep) | 75 | 3 | 12 Sep | 10 Oct | ||||
| 19. | Sparrowhawk | 12 | 2 | 14 | 14 | 0 | 9 ( 5 Sep) | 100 | 4 | 5 Sep | 10 Oct | ||||
| 20. | Marsh Harrier | 3 | 1 | 4 | 4 | 0 | 2 (20 Sep) | 75 | 3 | 5 Sep | 10 Oct | ||||
| 21. | Common Buzzard | 2 | 2 | 4 | 4 | 0 | 2 (20 Sep) | 50 | 2 | 20 Sep | 10 Oct | ||||
| 22. | Great Spotted Woodpecker | 6 | 0 | 6 | 6 | 0 | 4 (20 Sep) | 50 | 2 | 5 Sep | 20 Sep | ||||
| 23. | Kestrel | 2 | 0 | 2 | 2 | 0 | 2 (20 Sep) | 25 | 1 | 20 Sep | 20 Sep | ||||
| 24. | Hobby | 3 | 0 | 3 | 3 | 0 | 2 (20 Sep) | 50 | 2 | 12 Sep | 20 Sep | ||||
| 25. | Peregrine | 2 | 0 | 2 | 2 | 0 | 2 ( 5 Sep) | 25 | 1 | 5 Sep | 5 Sep | ||||
| 26. | Jay | 1 | 0 | 1 | 1 | 0 | 1 (20 Sep) | 25 | 1 | 20 Sep | 20 Sep | ||||
| 27. | Magpie | 2 | 0 | 2 | 2 | 0 | 2 (20 Sep) | 25 | 1 | 20 Sep | 20 Sep | ||||
| 28. | Jackdaw | 142 | 0 | 142 | 6 | 136 | 100 (12 Sep) | 75 | 3 | 5 Sep | 20 Sep | ||||
| 29. | Carrion Crow | 1 | 0 | 1 | 1 | 0 | 1 ( 5 Sep) | 25 | 1 | 5 Sep | 5 Sep | ||||
| 30. | Wood Lark | 1 | 0 | 1 | 1 | 0 | 1 (12 Sep) | 25 | 1 | 12 Sep | 12 Sep | ||||
| Species | Sep | Oct | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 31. | Skylark | 0 | 2 | 2 | 2 | 0 | 2 (10 Oct) | 25 | 1 | 10 Oct | 10 Oct | ||||
| 32. | Sand Martin | 6 | 0 | 6 | 6 | 0 | 4 ( 5 Sep) | 50 | 2 | 5 Sep | 12 Sep | ||||
| 33. | Swallow | 78 | 6 | 84 | 84 | 0 | 40 ( 5 Sep) | 100 | 4 | 5 Sep | 10 Oct | ||||
| 34. | House Martin | 32 | 0 | 32 | 32 | 0 | 32 ( 5 Sep) | 25 | 1 | 5 Sep | 5 Sep | ||||
| 35. | Starling | 238 | 135 | 373 | 373 | 0 | 145 (12 Sep) | 100 | 4 | 5 Sep | 10 Oct | ||||
| 36. | Song Thrush | 2 | 21 | 23 | 23 | 0 | 21 (10 Oct) | 50 | 2 | 20 Sep | 10 Oct | ||||
| 37. | Redwing | 0 | 19 | 19 | 19 | 0 | 19 (10 Oct) | 25 | 1 | 10 Oct | 10 Oct | ||||
| 38. | Blackbird | 1 | 0 | 1 | 1 | 0 | 1 (20 Sep) | 25 | 1 | 20 Sep | 20 Sep | ||||
| 39. | Redstart | 1 | 0 | 1 | 1 | 0 | 1 (12 Sep) | 25 | 1 | 12 Sep | 12 Sep | ||||
| 40. | Tree Sparrow | 1 | 0 | 1 | 1 | 0 | 1 (12 Sep) | 25 | 1 | 12 Sep | 12 Sep | ||||
| 41. | Blue-headed Wagtail | 2 | 0 | 2 | 2 | 0 | 1 ( 5 Sep) | 50 | 2 | 5 Sep | 12 Sep | ||||
| 42. | White Wagtail | 8 | 9 | 17 | 17 | 0 | 9 (10 Oct) | 75 | 3 | 12 Sep | 10 Oct | ||||
| 43. | Meadow Pipit | 23 | 37 | 60 | 60 | 0 | 37 (10 Oct) | 100 | 4 | 5 Sep | 10 Oct | ||||
| 44. | Tree Pipit | 5 | 0 | 5 | 5 | 0 | 5 (20 Sep) | 25 | 1 | 20 Sep | 20 Sep | ||||
| 45. | Chaffinch | 2 | 501 | 503 | 503 | 0 | 501 (10 Oct) | 50 | 2 | 5 Sep | 10 Oct | ||||
| 46. | Greenfinch | 2 | 7 | 9 | 9 | 0 | 7 (10 Oct) | 50 | 2 | 12 Sep | 10 Oct | ||||
| 47. | Siskin | 4 | 53 | 57 | 57 | 0 | 53 (10 Oct) | 100 | 4 | 5 Sep | 10 Oct | ||||
| 48. | Reed Bunting | 1 | 0 | 1 | 1 | 0 | 1 (12 Sep) | 25 | 1 | 12 Sep | 12 Sep | ||||
| Species | Sep | Oct | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| Totals | 1738 | 2107 | 3845 | 3469 | 376 | 100 | 4 | ||||||||
| Observation hours | 12:30 | 3:00 | 15:30 | ||||||||||||
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