Also present
Totals Bos van Aa Zemst (ringen) 2021
| Species | Jun | Jul | Aug | Sep | Oct | Totals | Newly ringed | Retraps | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 1. | Mute Swan | 0 | 0 | 3 | 0 | 0 | 3 | 3 | 0 | 3 (29 Aug) | 4 | 1 | 29 Aug | 29 Aug | ||||
| 2. | Water Rail | 0 | 0 | 19 | 5 | 0 | 24 | 6 | 18 | 6 (15 Aug) | 33 | 8 | 8 Aug | 19 Sep | ||||
| 3. | Spotted Crake | 0 | 0 | 2 | 0 | 0 | 2 | 1 | 1 | 1 (15 Aug) | 8 | 2 | 15 Aug | 28 Aug | ||||
| 4. | Moorhen | 0 | 0 | 2 | 0 | 0 | 2 | 2 | 0 | 1 (14 Aug) | 8 | 2 | 14 Aug | 29 Aug | ||||
| 5. | Snipe | 0 | 0 | 0 | 1 | 0 | 1 | 1 | 0 | 1 (26 Sep) | 4 | 1 | 26 Sep | 26 Sep | ||||
| 6. | Goshawk | 3 | 0 | 0 | 0 | 0 | 3 | 3 | 0 | 3 ( 3 Jun) | 4 | 1 | 3 Jun | 3 Jun | ||||
| 7. | Kingfisher | 0 | 0 | 2 | 0 | 0 | 2 | 2 | 0 | 1 (14 Aug) | 8 | 2 | 14 Aug | 15 Aug | ||||
| 8. | Lesser Spotted Woodpecker | 0 | 1 | 0 | 0 | 0 | 1 | 1 | 0 | 1 (31 Jul) | 4 | 1 | 31 Jul | 31 Jul | ||||
| 9. | Coal Tit | 0 | 0 | 0 | 3 | 6 | 9 | 9 | 0 | 4 (23 Oct) | 21 | 5 | 12 Sep | 24 Oct | ||||
| 10. | Marsh Tit | 0 | 2 | 0 | 0 | 0 | 2 | 2 | 0 | 2 (18 Jul) | 4 | 1 | 18 Jul | 18 Jul | ||||
| 11. | Willow Tit | 0 | 0 | 1 | 0 | 0 | 1 | 1 | 0 | 1 (15 Aug) | 4 | 1 | 15 Aug | 15 Aug | ||||
| 12. | Blue Tit | 0 | 8 | 28 | 15 | 144 | 195 | 189 | 6 | 93 (23 Oct) | 71 | 17 | 18 Jul | 24 Oct | ||||
| 13. | Great Tit | 0 | 7 | 7 | 5 | 25 | 44 | 36 | 8 | 8 (23 Oct) | 63 | 15 | 18 Jul | 24 Oct | ||||
| 14. | Sand Martin | 163 | 0 | 0 | 0 | 0 | 163 | 100 | 63 | 163 (26 Jun) | 4 | 1 | 26 Jun | 26 Jun | ||||
| 15. | Cetti's Warbler | 0 | 0 | 0 | 3 | 1 | 4 | 2 | 2 | 2 (26 Sep) | 13 | 3 | 11 Sep | 16 Oct | ||||
| 16. | Long-tailed Tit | 0 | 0 | 24 | 3 | 13 | 40 | 30 | 10 | 14 (22 Aug) | 25 | 6 | 15 Aug | 24 Oct | ||||
| 17. | Yellow-browed Warbler | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 0 | 1 ( 9 Oct) | 4 | 1 | 9 Oct | 9 Oct | ||||
| 18. | Willow Warbler | 0 | 2 | 6 | 3 | 0 | 11 | 11 | 0 | 2 (28 Aug) | 33 | 8 | 18 Jul | 12 Sep | ||||
| 19. | Chiffchaff | 1 | 23 | 21 | 122 | 96 | 263 | 257 | 6 | 36 (19 Sep) | 92 | 22 | 26 Jun | 24 Oct | ||||
| 20. | Chiffchaff (Siberian - tristis) | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 0 | 1 (24 Oct) | 4 | 1 | 24 Oct | 24 Oct | ||||
| 21. | Sedge Warbler | 0 | 4 | 13 | 6 | 0 | 23 | 23 | 0 | 5 (28 Aug) | 42 | 10 | 18 Jul | 18 Sep | ||||
| 22. | Blyth's Reed-Warbler | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 0 | 1 (16 Oct) | 4 | 1 | 16 Oct | 16 Oct | ||||
| 23. | Reed Warbler | 0 | 37 | 146 | 88 | 2 | 273 | 257 | 16 | 57 (15 Aug) | 71 | 17 | 18 Jul | 9 Oct | ||||
| 24. | Marsh Warbler | 0 | 17 | 12 | 0 | 0 | 29 | 27 | 2 | 16 (18 Jul) | 21 | 5 | 18 Jul | 15 Aug | ||||
| 25. | Icterine Warbler | 0 | 0 | 1 | 0 | 0 | 1 | 1 | 0 | 1 (14 Aug) | 4 | 1 | 14 Aug | 14 Aug | ||||
| 26. | Savi's Warbler | 0 | 1 | 0 | 0 | 0 | 1 | 1 | 0 | 1 (18 Jul) | 4 | 1 | 18 Jul | 18 Jul | ||||
| 27. | Grasshopper Warbler | 0 | 2 | 4 | 13 | 1 | 20 | 20 | 0 | 12 ( 5 Sep) | 25 | 6 | 18 Jul | 9 Oct | ||||
| 28. | Blackcap | 0 | 27 | 136 | 532 | 68 | 763 | 753 | 10 | 120 (18 Sep) | 92 | 22 | 18 Jul | 24 Oct | ||||
| 29. | Garden Warbler | 0 | 4 | 25 | 7 | 0 | 36 | 35 | 1 | 12 (15 Aug) | 50 | 12 | 18 Jul | 26 Sep | ||||
| 30. | Whitethroat | 0 | 3 | 13 | 5 | 0 | 21 | 20 | 1 | 5 (14 Aug) | 38 | 9 | 18 Jul | 19 Sep | ||||
| Species | Jun | Jul | Aug | Sep | Oct | Totals | Newly ringed | Retraps | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 31. | Firecrest | 0 | 0 | 0 | 1 | 11 | 12 | 12 | 0 | 6 ( 2 Oct) | 17 | 4 | 25 Sep | 16 Oct | ||||
| 32. | Goldcrest | 0 | 0 | 0 | 0 | 3 | 3 | 3 | 0 | 2 (10 Oct) | 8 | 2 | 10 Oct | 24 Oct | ||||
| 33. | Wren | 0 | 0 | 1 | 0 | 15 | 16 | 16 | 0 | 5 (16 Oct) | 33 | 8 | 22 Aug | 24 Oct | ||||
| 34. | Starling | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 0 | 1 (17 Oct) | 4 | 1 | 17 Oct | 17 Oct | ||||
| 35. | Song Thrush | 0 | 0 | 0 | 0 | 17 | 17 | 17 | 0 | 6 (10 Oct) | 29 | 7 | 2 Oct | 24 Oct | ||||
| 36. | Redwing | 0 | 0 | 0 | 0 | 3 | 3 | 3 | 0 | 3 (23 Oct) | 4 | 1 | 23 Oct | 23 Oct | ||||
| 37. | Blackbird | 0 | 0 | 1 | 0 | 16 | 17 | 16 | 1 | 6 (16 Oct) | 33 | 8 | 28 Aug | 24 Oct | ||||
| 38. | Robin | 0 | 1 | 21 | 57 | 123 | 202 | 195 | 7 | 43 (16 Oct) | 79 | 19 | 18 Jul | 24 Oct | ||||
| 39. | Bluethroat | 0 | 0 | 2 | 1 | 0 | 3 | 3 | 0 | 1 ( 8 Aug) | 13 | 3 | 8 Aug | 18 Sep | ||||
| 40. | Black Redstart | 0 | 1 | 0 | 0 | 0 | 1 | 1 | 0 | 1 (31 Jul) | 4 | 1 | 31 Jul | 31 Jul | ||||
| 41. | Redstart | 0 | 0 | 4 | 12 | 0 | 16 | 16 | 0 | 8 ( 5 Sep) | 29 | 7 | 15 Aug | 26 Sep | ||||
| 42. | Dunnock | 0 | 0 | 0 | 2 | 5 | 7 | 7 | 0 | 2 (16 Oct) | 25 | 6 | 5 Sep | 24 Oct | ||||
| 43. | Grey Wagtail | 0 | 0 | 0 | 6 | 1 | 7 | 7 | 0 | 3 (19 Sep) | 17 | 4 | 19 Sep | 23 Oct | ||||
| 44. | Tree Pipit | 0 | 0 | 3 | 0 | 0 | 3 | 3 | 0 | 3 (28 Aug) | 4 | 1 | 28 Aug | 28 Aug | ||||
| 45. | Chaffinch | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 0 | 1 (23 Oct) | 4 | 1 | 23 Oct | 23 Oct | ||||
| 46. | Linnet | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 0 | 1 (10 Oct) | 4 | 1 | 10 Oct | 10 Oct | ||||
| 47. | Siskin | 0 | 0 | 0 | 0 | 10 | 10 | 10 | 0 | 4 ( 9 Oct) | 13 | 3 | 9 Oct | 24 Oct | ||||
| 48. | Reed Bunting | 0 | 2 | 2 | 4 | 26 | 34 | 28 | 6 | 10 (23 Oct) | 50 | 12 | 31 Jul | 24 Oct | ||||
| Species | Jun | Jul | Aug | Sep | Oct | Totals | Newly ringed | Retraps | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| Totals | 167 | 142 | 499 | 894 | 592 | 2294 | 2136 | 158 | 100 | 24 | ||||||||
| Observation hours | 4:30 | 9:00 | 29:30 | 29:30 | 32:00 | 104:30 | ||||||||||||
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