Totals Opstalvallei 2021
| Year | |
| Period | |
| count-field | |
| Also present | |
| Species | Sep | Oct | Nov | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 1. | Canada Goose | 0 | 17 | 0 | 17 | 17 | 0 | 17 (22 Oct) | 4 | 1 | 22 Oct | 22 Oct | ||||
| 2. | Barnacle Goose | 0 | 1 | 0 | 1 | 1 | 0 | 1 (11 Oct) | 4 | 1 | 11 Oct | 11 Oct | ||||
| 3. | Greylag Goose | 2 | 92 | 45 | 139 | 139 | 0 | 40 (13 Oct) | 32 | 9 | 26 Sep | 7 Nov | ||||
| 4. | Eurasian White-fronted Goose | 52 | 44 | 15 | 111 | 106 | 5 | 52 (26 Sep) | 25 | 7 | 26 Sep | 6 Nov | ||||
| 5. | Mute Swan | 0 | 6 | 0 | 6 | 6 | 0 | 5 (23 Oct) | 7 | 2 | 16 Oct | 23 Oct | ||||
| 6. | Egyptian Goose | 0 | 12 | 0 | 12 | 12 | 0 | 12 (11 Oct) | 4 | 1 | 11 Oct | 11 Oct | ||||
| 7. | Mallard | 4 | 23 | 15 | 42 | 42 | 0 | 14 (23 Oct) | 25 | 7 | 26 Sep | 8 Nov | ||||
| 8. | duck sp. | 0 | 3 | 0 | 3 | 3 | 0 | 3 (17 Oct) | 4 | 1 | 17 Oct | 17 Oct | ||||
| 9. | Stock Dove | 13 | 105 | 28 | 146 | 145 | 1 | 20 (16 Oct) | 89 | 25 | 19 Sep | 8 Nov | ||||
| 10. | Woodpigeon | 71 | 1965 | 1259 | 3295 | 3215 | 80 | 661 (24 Oct) | 100 | 28 | 19 Sep | 11 Nov | ||||
| 11. | Collared Dove | 0 | 10 | 0 | 10 | 10 | 0 | 4 (11 Oct) | 14 | 4 | 8 Oct | 24 Oct | ||||
| 12. | Lapwing | 8 | 38 | 10 | 56 | 53 | 3 | 20 ( 9 Oct) | 25 | 7 | 25 Sep | 7 Nov | ||||
| 13. | Snipe | 1 | 0 | 0 | 1 | 1 | 0 | 1 (26 Sep) | 4 | 1 | 26 Sep | 26 Sep | ||||
| 14. | Black-headed Gull | 11 | 509 | 396 | 916 | 907 | 9 | 94 (23 Oct) | 86 | 24 | 25 Sep | 11 Nov | ||||
| 15. | Common Gull | 6 | 47 | 60 | 113 | 107 | 6 | 20 ( 2 Oct) | 54 | 15 | 25 Sep | 11 Nov | ||||
| 16. | Herring Gull | 13 | 816 | 556 | 1385 | 1325 | 60 | 274 ( 2 Oct) | 86 | 24 | 25 Sep | 11 Nov | ||||
| 17. | Great Black-backed Gull | 2 | 15 | 6 | 23 | 23 | 0 | 6 ( 2 Oct) | 36 | 10 | 25 Sep | 8 Nov | ||||
| 18. | Lesser Black-backed Gull | 2 | 4 | 8 | 14 | 14 | 0 | 7 ( 1 Nov) | 18 | 5 | 25 Sep | 6 Nov | ||||
| 19. | Cormorant | 84 | 743 | 2 | 829 | 829 | 0 | 256 (22 Oct) | 64 | 18 | 19 Sep | 7 Nov | ||||
| 20. | Great White Egret | 4 | 31 | 10 | 45 | 42 | 3 | 7 (25 Oct) | 68 | 19 | 19 Sep | 8 Nov | ||||
| 21. | Grey Heron | 1 | 7 | 4 | 12 | 11 | 1 | 4 (16 Oct) | 21 | 6 | 19 Sep | 6 Nov | ||||
| 22. | Sparrowhawk | 4 | 46 | 21 | 71 | 71 | 0 | 11 (31 Oct) | 68 | 19 | 25 Sep | 8 Nov | ||||
| 23. | Goshawk | 0 | 1 | 0 | 1 | 1 | 0 | 1 (18 Oct) | 4 | 1 | 18 Oct | 18 Oct | ||||
| 24. | Marsh Harrier | 0 | 1 | 1 | 2 | 2 | 0 | 1 ( 1 Oct) | 7 | 2 | 1 Oct | 2 Nov | ||||
| 25. | harrier sp. | 0 | 1 | 0 | 1 | 1 | 0 | 1 (31 Oct) | 4 | 1 | 31 Oct | 31 Oct | ||||
| 26. | Common Buzzard | 2 | 39 | 7 | 48 | 48 | 0 | 9 (22 Oct) | 57 | 16 | 26 Sep | 8 Nov | ||||
| 27. | Lesser Spotted Woodpecker | 0 | 1 | 0 | 1 | 1 | 0 | 1 (24 Oct) | 4 | 1 | 24 Oct | 24 Oct | ||||
| 28. | Great Spotted Woodpecker | 1 | 10 | 1 | 12 | 12 | 0 | 4 (13 Oct) | 21 | 6 | 19 Sep | 7 Nov | ||||
| 29. | Merlin | 0 | 3 | 0 | 3 | 3 | 0 | 1 ( 1 Oct) | 11 | 3 | 1 Oct | 24 Oct | ||||
| 30. | Peregrine | 0 | 1 | 1 | 2 | 2 | 0 | 1 (23 Oct) | 7 | 2 | 23 Oct | 1 Nov | ||||
| Species | Sep | Oct | Nov | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 31. | Jay | 1204 | 395 | 0 | 1599 | 1338 | 261 | 1036 (25 Sep) | 36 | 10 | 19 Sep | 24 Oct | ||||
| 32. | Jackdaw | 6 | 2304 | 298 | 2608 | 2567 | 41 | 613 (16 Oct) | 75 | 21 | 26 Sep | 11 Nov | ||||
| 33. | Rook | 0 | 0 | 1 | 1 | 1 | 0 | 1 ( 1 Nov) | 4 | 1 | 1 Nov | 1 Nov | ||||
| 34. | Carrion Crow | 2 | 54 | 9 | 65 | 31 | 34 | 28 ( 9 Oct) | 18 | 5 | 26 Sep | 8 Nov | ||||
| 35. | Coal Tit | 4 | 534 | 22 | 560 | 560 | 0 | 172 (16 Oct) | 68 | 19 | 26 Sep | 8 Nov | ||||
| 36. | Blue Tit | 11 | 1262 | 1837 | 3110 | 3110 | 0 | 1259 ( 7 Nov) | 79 | 22 | 19 Sep | 11 Nov | ||||
| 37. | Great Tit | 0 | 97 | 12 | 109 | 109 | 0 | 22 (16 Oct) | 54 | 15 | 8 Oct | 8 Nov | ||||
| 38. | Parus (tit) sp. | 0 | 534 | 36 | 570 | 570 | 0 | 258 (18 Oct) | 18 | 5 | 17 Oct | 6 Nov | ||||
| 39. | Wood Lark | 7 | 44 | 18 | 69 | 69 | 0 | 11 ( 2 Nov) | 64 | 18 | 19 Sep | 5 Nov | ||||
| 40. | Skylark | 0 | 262 | 31 | 293 | 293 | 0 | 82 (29 Oct) | 61 | 17 | 8 Oct | 5 Nov | ||||
| 41. | Sand Martin | 0 | 3 | 0 | 3 | 3 | 0 | 3 ( 8 Oct) | 4 | 1 | 8 Oct | 8 Oct | ||||
| 42. | Swallow | 112 | 107 | 0 | 219 | 219 | 0 | 79 ( 8 Oct) | 25 | 7 | 25 Sep | 16 Oct | ||||
| 43. | House Martin | 0 | 27 | 0 | 27 | 27 | 0 | 27 ( 2 Oct) | 4 | 1 | 2 Oct | 2 Oct | ||||
| 44. | Firecrest | 0 | 1 | 0 | 1 | 1 | 0 | 1 (23 Oct) | 4 | 1 | 23 Oct | 23 Oct | ||||
| 45. | Goldcrest | 0 | 3 | 0 | 3 | 3 | 0 | 2 (23 Oct) | 7 | 2 | 23 Oct | 29 Oct | ||||
| 46. | Starling | 337 | 8060 | 2902 | 11299 | 11299 | 0 | 1130 (18 Oct) | 100 | 28 | 19 Sep | 11 Nov | ||||
| 47. | Song Thrush | 9 | 518 | 48 | 575 | 564 | 11 | 93 (17 Oct) | 96 | 27 | 19 Sep | 11 Nov | ||||
| 48. | Mistle Thrush | 1 | 26 | 3 | 30 | 30 | 0 | 10 (25 Oct) | 39 | 11 | 26 Sep | 7 Nov | ||||
| 49. | Redwing | 0 | 8577 | 3358 | 11935 | 11935 | 0 | 4617 (24 Oct) | 79 | 22 | 8 Oct | 11 Nov | ||||
| 50. | Blackbird | 1 | 26 | 56 | 83 | 83 | 0 | 29 ( 5 Nov) | 68 | 19 | 26 Sep | 11 Nov | ||||
| 51. | Fieldfare | 0 | 13 | 216 | 229 | 229 | 0 | 188 ( 6 Nov) | 25 | 7 | 23 Oct | 11 Nov | ||||
| 52. | Ring Ouzel | 0 | 12 | 0 | 12 | 12 | 0 | 12 (13 Oct) | 4 | 1 | 13 Oct | 13 Oct | ||||
| 53. | thrush sp. | 0 | 376 | 242 | 618 | 618 | 0 | 147 ( 6 Nov) | 57 | 16 | 9 Oct | 11 Nov | ||||
| 54. | Tree Sparrow | 0 | 7 | 0 | 7 | 7 | 0 | 4 (16 Oct) | 14 | 4 | 16 Oct | 24 Oct | ||||
| 55. | Dunnock | 5 | 84 | 18 | 107 | 107 | 0 | 17 ( 2 Oct) | 86 | 24 | 19 Sep | 11 Nov | ||||
| 56. | Blue-headed Wagtail | 1 | 0 | 0 | 1 | 1 | 0 | 1 (25 Sep) | 4 | 1 | 25 Sep | 25 Sep | ||||
| 57. | Yellow wagtail sp. | 0 | 1 | 0 | 1 | 1 | 0 | 1 ( 2 Oct) | 4 | 1 | 2 Oct | 2 Oct | ||||
| 58. | Grey Wagtail | 2 | 3 | 0 | 5 | 5 | 0 | 2 (26 Sep) | 11 | 3 | 26 Sep | 23 Oct | ||||
| 59. | White Wagtail | 28 | 109 | 7 | 144 | 143 | 1 | 16 (16 Oct) | 82 | 23 | 19 Sep | 11 Nov | ||||
| 60. | Meadow Pipit | 155 | 617 | 88 | 860 | 860 | 0 | 181 ( 2 Oct) | 100 | 28 | 19 Sep | 11 Nov | ||||
| Species | Sep | Oct | Nov | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 61. | Tree Pipit | 22 | 2 | 2 | 26 | 26 | 0 | 12 (26 Sep) | 18 | 5 | 19 Sep | 5 Nov | ||||
| 62. | pipit sp. | 1 | 1 | 0 | 2 | 2 | 0 | 1 (25 Sep) | 7 | 2 | 25 Sep | 9 Oct | ||||
| 63. | Chaffinch | 61 | 5790 | 792 | 6643 | 6635 | 8 | 1271 (22 Oct) | 93 | 26 | 19 Sep | 11 Nov | ||||
| 64. | Brambling | 0 | 1002 | 139 | 1141 | 1141 | 0 | 318 (16 Oct) | 75 | 21 | 8 Oct | 11 Nov | ||||
| 65. | finch sp. | 5 | 1441 | 27 | 1473 | 1473 | 0 | 592 (25 Oct) | 36 | 10 | 25 Sep | 8 Nov | ||||
| 66. | Chaffinch/Brambling | 0 | 3212 | 5326 | 8538 | 8538 | 0 | 2622 ( 2 Nov) | 39 | 11 | 17 Oct | 11 Nov | ||||
| 67. | Hawfinch | 0 | 90 | 34 | 124 | 124 | 0 | 23 (16 Oct) | 50 | 14 | 13 Oct | 11 Nov | ||||
| 68. | Greenfinch | 3 | 88 | 19 | 110 | 110 | 0 | 20 (16 Oct) | 79 | 22 | 26 Sep | 8 Nov | ||||
| 69. | Linnet | 7 | 220 | 0 | 227 | 227 | 0 | 51 ( 2 Oct) | 54 | 15 | 25 Sep | 29 Oct | ||||
| 70. | redpoll sp. | 0 | 0 | 10 | 10 | 10 | 0 | 4 ( 6 Nov) | 14 | 4 | 2 Nov | 7 Nov | ||||
| 71. | Crossbill | 0 | 5 | 0 | 5 | 5 | 0 | 5 (31 Oct) | 4 | 1 | 31 Oct | 31 Oct | ||||
| 72. | Goldfinch | 5 | 100 | 8 | 113 | 102 | 11 | 22 ( 9 Oct) | 64 | 18 | 25 Sep | 7 Nov | ||||
| 73. | Siskin | 5 | 1731 | 235 | 1971 | 1928 | 43 | 315 (17 Oct) | 93 | 26 | 25 Sep | 11 Nov | ||||
| 74. | Reed Bunting | 6 | 98 | 39 | 143 | 143 | 0 | 27 (13 Oct) | 79 | 22 | 19 Sep | 8 Nov | ||||
| 75. | passerine sp. | 0 | 10 | 0 | 10 | 10 | 0 | 10 ( 2 Oct) | 4 | 1 | 2 Oct | 2 Oct | ||||
| Species | Sep | Oct | Nov | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| Totals | 2281 | 42437 | 18278 | 62996 | 62418 | 578 | 100 | 28 | ||||||||
| Observation hours | 10:29 | 55:08 | 17:09 | 82:46 | ||||||||||||
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