Helsinki, Santahamina (nocturnal migration)
Totals 2023 -
| Year | |
| Period | |
| count-field | |
| Also present | |
| Species | May | Jun | Jul | Totals | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 1. | Dark-bellied Brent Goose | 140 | 0 | 0 | 140 | 140 (25 May) | 3 | 1 | 25 May | 25 May | ||||
| 2. | Barnacle Goose | 890 | 0 | 0 | 890 | 450 (25 May) | 26 | 10 | 10 May | 25 May | ||||
| 3. | Mute Swan | 0 | 1 | 0 | 1 | 1 (12 Jun) | 3 | 1 | 12 Jun | 12 Jun | ||||
| 4. | Common Scoter | 190 | 0 | 0 | 190 | 97 (11 May) | 21 | 8 | 10 May | 23 May | ||||
| 5. | Long-tailed Duck | 28 | 0 | 0 | 28 | 10 (13 May) | 11 | 4 | 13 May | 19 May | ||||
| 6. | Goldeneye | 19 | 0 | 0 | 19 | 5 (25 May) | 16 | 6 | 12 May | 25 May | ||||
| 7. | Nightjar | 0 | 2 | 0 | 2 | 1 (2 Jun) | 5 | 2 | 2 Jun | 12 Jun | ||||
| 8. | Water Rail | 1 | 0 | 0 | 1 | 1 (22 May) | 3 | 1 | 22 May | 22 May | ||||
| 9. | Moorhen | 1 | 0 | 0 | 1 | 1 (22 May) | 3 | 1 | 22 May | 22 May | ||||
| 10. | Coot | 2 | 0 | 0 | 2 | 1 (12 May) | 5 | 2 | 12 May | 29 May | ||||
| 11. | Oystercatcher | 7 | 0 | 0 | 7 | 3 (25 May) | 13 | 5 | 10 May | 27 May | ||||
| 12. | Golden Plover | 1 | 0 | 0 | 1 | 1 (13 May) | 3 | 1 | 13 May | 13 May | ||||
| 13. | Ringed Plover | 1 | 0 | 0 | 1 | 1 (10 May) | 3 | 1 | 10 May | 10 May | ||||
| 14. | Curlew | 1 | 2 | 0 | 3 | 1 (31 May) | 8 | 3 | 31 May | 16 Jun | ||||
| 15. | Common Sandpiper | 18 | 0 | 4 | 22 | 4 (11 May) | 26 | 10 | 10 May | 27 Jul | ||||
| 16. | Green Sandpiper | 0 | 0 | 5 | 5 | 4 (26 Jul) | 5 | 2 | 25 Jul | 26 Jul | ||||
| 17. | Wood Sandpiper | 1 | 0 | 0 | 1 | 1 (16 May) | 3 | 1 | 16 May | 16 May | ||||
| 18. | Redshank | 0 | 0 | 1 | 1 | 1 (26 Jul) | 3 | 1 | 26 Jul | 26 Jul | ||||
| 19. | Spotted Redshank | 1 | 0 | 1 | 2 | 1 (14 May) | 5 | 2 | 14 May | 27 Jul | ||||
| 20. | Black-headed Gull | 1 | 1 | 1 | 3 | 1 (20 May) | 8 | 3 | 20 May | 26 Jul | ||||
| 21. | Bittern | 1 | 1 | 0 | 2 | 1 (25 May) | 5 | 2 | 25 May | 16 Jun | ||||
| 22. | Grey Heron | 3 | 0 | 2 | 5 | 2 (12 May) | 8 | 3 | 12 May | 25 Jul | ||||
| Species | May | Jun | Jul | Totals | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| Totals | 1306 | 7 | 14 | 1327 | 1327 | 160 | 100 | 38 | ||||||
| Observation hours | 67:20 | 24:50 | 12:30 | 104:40 | ||||||||||
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