Also present
Totals Terschelling, Formerum aan Zee 2021
| Species | Jul | Aug | Sep | Oct | Totals | W | E | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 1. | Wigeon | 0 | 0 | 0 | 16 | 16 | 16 | 0 | 16 (21 Oct) | 14 | 1 | 21 Oct | 21 Oct | ||||
| 2. | Teal | 0 | 18 | 0 | 0 | 18 | 18 | 0 | 11 (27 Aug) | 43 | 3 | 23 Aug | 27 Aug | ||||
| 3. | Scaup | 0 | 0 | 0 | 14 | 14 | 14 | 0 | 14 (21 Oct) | 14 | 1 | 21 Oct | 21 Oct | ||||
| 4. | Velvet Scoter | 0 | 11 | 0 | 0 | 11 | 0 | 11 | 7 (27 Aug) | 29 | 2 | 26 Aug | 27 Aug | ||||
| 5. | Common Scoter | 109 | 2087 | 0 | 235 | 2431 | 2020 | 411 | 854 (23 Aug) | 100 | 7 | 31 Jul | 21 Oct | ||||
| 6. | Oystercatcher | 0 | 0 | 0 | 1 | 1 | 1 | 0 | 1 (21 Oct) | 14 | 1 | 21 Oct | 21 Oct | ||||
| 7. | Golden Plover | 0 | 4 | 0 | 0 | 4 | 4 | 0 | 4 (25 Aug) | 14 | 1 | 25 Aug | 25 Aug | ||||
| 8. | Ringed Plover | 0 | 18 | 0 | 0 | 18 | 18 | 0 | 18 (23 Aug) | 14 | 1 | 23 Aug | 23 Aug | ||||
| 9. | Whimbrel | 1 | 3 | 0 | 0 | 4 | 2 | 2 | 2 (26 Aug) | 43 | 3 | 31 Jul | 27 Aug | ||||
| 10. | Curlew | 1 | 0 | 0 | 0 | 1 | 1 | 0 | 1 (31 Jul) | 14 | 1 | 31 Jul | 31 Jul | ||||
| 11. | Bar-tailed Godwit | 0 | 1 | 0 | 0 | 1 | 1 | 0 | 1 (26 Aug) | 14 | 1 | 26 Aug | 26 Aug | ||||
| 12. | Snipe | 0 | 1 | 0 | 0 | 1 | 1 | 0 | 1 (27 Aug) | 14 | 1 | 27 Aug | 27 Aug | ||||
| 13. | Turnstone | 0 | 2 | 0 | 0 | 2 | 2 | 0 | 2 (25 Aug) | 14 | 1 | 25 Aug | 25 Aug | ||||
| 14. | Knot | 0 | 1 | 0 | 0 | 1 | 1 | 0 | 1 (26 Aug) | 14 | 1 | 26 Aug | 26 Aug | ||||
| 15. | wader sp. | 0 | 4 | 0 | 0 | 4 | 4 | 0 | 4 (23 Aug) | 14 | 1 | 23 Aug | 23 Aug | ||||
| 16. | Sanderling | 0 | 25 | 0 | 5 | 30 | 30 | 0 | 25 (23 Aug) | 29 | 2 | 23 Aug | 21 Oct | ||||
| 17. | Calidris sp. | 0 | 2 | 0 | 0 | 2 | 2 | 0 | 2 (27 Aug) | 14 | 1 | 27 Aug | 27 Aug | ||||
| 18. | Little Tern | 0 | 3 | 0 | 0 | 3 | 3 | 0 | 3 (23 Aug) | 14 | 1 | 23 Aug | 23 Aug | ||||
| 19. | Black Tern | 0 | 21 | 0 | 0 | 21 | 21 | 0 | 8 (26 Aug) | 57 | 4 | 23 Aug | 27 Aug | ||||
| 20. | Arctic Tern | 0 | 1 | 0 | 0 | 1 | 0 | 1 | 1 (27 Aug) | 14 | 1 | 27 Aug | 27 Aug | ||||
| 21. | Common/Arctic Tern | 65 | 1212 | 0 | 0 | 1277 | 1237 | 40 | 645 (25 Aug) | 71 | 5 | 31 Jul | 27 Aug | ||||
| 22. | Sandwich Tern | 160 | 2007 | 0 | 1 | 2168 | 1919 | 249 | 745 (23 Aug) | 86 | 6 | 31 Jul | 21 Oct | ||||
| 23. | Little Gull | 0 | 0 | 0 | 1 | 1 | 1 | 0 | 1 (21 Oct) | 14 | 1 | 21 Oct | 21 Oct | ||||
| 24. | Kittiwake | 17 | 10 | 0 | 41 | 68 | 68 | 0 | 41 (21 Oct) | 71 | 5 | 31 Jul | 21 Oct | ||||
| 25. | Black-headed Gull | 0 | 0 | 0 | 2 | 2 | 2 | 0 | 2 (21 Oct) | 14 | 1 | 21 Oct | 21 Oct | ||||
| 26. | Common Gull | 0 | 0 | 0 | 3 | 3 | 3 | 0 | 3 (21 Oct) | 14 | 1 | 21 Oct | 21 Oct | ||||
| 27. | Great Black-backed Gull | 0 | 0 | 0 | 1 | 1 | 1 | 0 | 1 (21 Oct) | 14 | 1 | 21 Oct | 21 Oct | ||||
| 28. | Lesser Black-backed Gull | 1350 | 0 | 0 | 0 | 1350 | 1350 | 0 | 1350 (31 Jul) | 14 | 1 | 31 Jul | 31 Jul | ||||
| 29. | skua sp. | 0 | 1 | 0 | 0 | 1 | 1 | 0 | 1 (26 Aug) | 14 | 1 | 26 Aug | 26 Aug | ||||
| 30. | Arctic Skua | 0 | 45 | 0 | 0 | 45 | 42 | 3 | 26 (26 Aug) | 57 | 4 | 2 Aug | 27 Aug | ||||
| Species | Jul | Aug | Sep | Oct | Totals | W | E | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 31. | Great Skua | 0 | 2 | 0 | 0 | 2 | 2 | 0 | 2 ( 2 Aug) | 14 | 1 | 2 Aug | 2 Aug | ||||
| 32. | Razorbill/Guillemot | 0 | 2 | 0 | 32 | 34 | 28 | 6 | 32 (21 Oct) | 43 | 3 | 23 Aug | 21 Oct | ||||
| 33. | Little Auk | 0 | 0 | 0 | 1 | 1 | 1 | 0 | 1 (21 Oct) | 14 | 1 | 21 Oct | 21 Oct | ||||
| 34. | Guillemot | 0 | 1 | 0 | 0 | 1 | 0 | 1 | 1 (27 Aug) | 14 | 1 | 27 Aug | 27 Aug | ||||
| 35. | diver sp. | 0 | 0 | 0 | 5 | 5 | 5 | 0 | 5 (21 Oct) | 14 | 1 | 21 Oct | 21 Oct | ||||
| 36. | Fulmar | 0 | 1 | 0 | 0 | 1 | 1 | 0 | 1 ( 2 Aug) | 14 | 1 | 2 Aug | 2 Aug | ||||
| 37. | Sooty Shearwater | 0 | 0 | 0 | 6 | 6 | 6 | 0 | 6 (21 Oct) | 14 | 1 | 21 Oct | 21 Oct | ||||
| 38. | Gannet | 30 | 782 | 0 | 53 | 865 | 849 | 16 | 594 (27 Aug) | 100 | 7 | 31 Jul | 21 Oct | ||||
| 39. | Cormorant | 8 | 71 | 0 | 1 | 80 | 47 | 33 | 28 ( 2 Aug) | 100 | 7 | 31 Jul | 21 Oct | ||||
| 40. | Blue-headed Wagtail | 0 | 1 | 0 | 0 | 1 | 1 | 0 | 1 (23 Aug) | 14 | 1 | 23 Aug | 23 Aug | ||||
| Species | Jul | Aug | Sep | Oct | Totals | W | E | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| Totals | 1741 | 6337 | 0 | 418 | 8496 | 7723 | 773 | 100 | 7 | ||||||||
| Observation hours | 1:30 | 17:15 | 0:00 | 1:00 | 19:45 | ||||||||||||
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