Totals Polder Krûsbrekken 2021
| Year | |
| Period | |
| count-field | |
| Also present | |
| Species | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Totals | Newly ringed | Retraps | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 1. | Gadwall | 0 | 1 | 5 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | 0 | 8 | 8 | 0 | 2 (5 Mar) | 32 | 6 | 26 Feb | 22 Sep | ||||
| 2. | Pintail | 0 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 2 | 0 | 2 (25 Mar) | 5 | 1 | 25 Mar | 25 Mar | ||||
| 3. | Oystercatcher | 0 | 0 | 4 | 0 | 0 | 0 | 3 | 0 | 0 | 0 | 0 | 0 | 7 | 7 | 0 | 3 (23 Jul) | 21 | 4 | 5 Mar | 23 Jul | ||||
| 4. | Golden Plover | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 11 | 0 | 0 | 4 | 17 | 17 | 0 | 11 (22 Sep) | 16 | 3 | 18 Aug | 7 Dec | ||||
| 5. | Lapwing | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 0 | 4 | 4 | 0 | 1 (25 Feb) | 21 | 4 | 25 Feb | 14 Oct | ||||
| 6. | Whimbrel | 0 | 0 | 0 | 5 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 5 | 5 | 0 | 5 (15 Apr) | 5 | 1 | 15 Apr | 15 Apr | ||||
| 7. | Curlew | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 1 (18 Aug) | 5 | 1 | 18 Aug | 18 Aug | ||||
| 8. | Black-tailed Godwit | 0 | 1 | 31 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 35 | 34 | 1 | 9 (19 Mar) | 47 | 9 | 26 Feb | 14 Apr | ||||
| 9. | Snipe | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 2 | 0 | 0 | 0 | 3 | 3 | 0 | 2 (22 Sep) | 11 | 2 | 18 Aug | 22 Sep | ||||
| 10. | Redshank | 0 | 0 | 2 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 4 | 4 | 0 | 2 (2 Apr) | 16 | 3 | 5 Mar | 2 Apr | ||||
| 11. | Spotted Redshank | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 1 (23 Jul) | 5 | 1 | 23 Jul | 23 Jul | ||||
| 12. | Ruff | 0 | 4 | 20 | 20 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 44 | 44 | 0 | 11 (2 Apr) | 37 | 7 | 26 Feb | 15 Apr | ||||
| 13. | Black-headed Gull | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 1 (23 Jul) | 5 | 1 | 23 Jul | 23 Jul | ||||
| 14. | Common Gull | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 1 (23 Jul) | 5 | 1 | 23 Jul | 23 Jul | ||||
| Species | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Totals | Newly ringed | Retraps | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| Totals | 0 | 7 | 65 | 30 | 0 | 0 | 6 | 5 | 15 | 1 | 0 | 4 | 133 | 132 | 1 | 100 | 19 | ||||||||
| Observation hours | 9:00 | 12:45 | 44:23 | 19:30 | 0:00 | 0:00 | 6:30 | 6:00 | 6:59 | 6:00 | 0:00 | 4:00 | 115:07 | ||||||||||||
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