Also present
Totals Castricum aan Zee (zeetrek) 2025
| Species | Jan | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 1. | Dark-bellied Brent Goose | 17 | 17 | 0 | 17 | 17 ( 2 Jan) | 33 | 1 | 2 Jan | 2 Jan | ||||
| 2. | Barnacle Goose | 66 | 66 | 54 | 12 | 66 (22 Jan) | 33 | 1 | 22 Jan | 22 Jan | ||||
| 3. | Greylag Goose | 1 | 1 | 1 | 0 | 1 (22 Jan) | 33 | 1 | 22 Jan | 22 Jan | ||||
| 4. | Pink-footed Goose | 98 | 98 | 0 | 98 | 98 (22 Jan) | 33 | 1 | 22 Jan | 22 Jan | ||||
| 5. | Eurasian White-fronted Goose | 4 | 4 | 0 | 4 | 4 (22 Jan) | 33 | 1 | 22 Jan | 22 Jan | ||||
| 6. | Egyptian Goose | 2 | 2 | 1 | 1 | 2 (22 Jan) | 33 | 1 | 22 Jan | 22 Jan | ||||
| 7. | Shelduck | 7 | 7 | 0 | 7 | 7 ( 2 Jan) | 33 | 1 | 2 Jan | 2 Jan | ||||
| 8. | Wigeon | 343 | 343 | 333 | 10 | 333 (22 Jan) | 100 | 3 | 2 Jan | 22 Jan | ||||
| 9. | Pintail | 1 | 1 | 1 | 0 | 1 (22 Jan) | 33 | 1 | 22 Jan | 22 Jan | ||||
| 10. | Teal | 21 | 21 | 17 | 4 | 13 (22 Jan) | 100 | 3 | 2 Jan | 22 Jan | ||||
| 11. | Tufted Duck | 2 | 2 | 2 | 0 | 2 (22 Jan) | 33 | 1 | 22 Jan | 22 Jan | ||||
| 12. | Eider | 10 | 10 | 10 | 0 | 7 (11 Jan) | 100 | 3 | 2 Jan | 22 Jan | ||||
| 13. | Velvet Scoter | 27 | 27 | 27 | 0 | 27 ( 2 Jan) | 33 | 1 | 2 Jan | 2 Jan | ||||
| 14. | Common Scoter | 343 | 343 | 265 | 78 | 258 ( 2 Jan) | 100 | 3 | 2 Jan | 22 Jan | ||||
| 15. | Smew | 3 | 3 | 3 | 0 | 2 (22 Jan) | 67 | 2 | 11 Jan | 22 Jan | ||||
| 16. | Red-necked Grebe | 1 | 1 | 1 | 0 | 1 (22 Jan) | 33 | 1 | 22 Jan | 22 Jan | ||||
| 17. | Great Crested Grebe | 182 | 182 | 182 | 0 | 181 (22 Jan) | 67 | 2 | 2 Jan | 22 Jan | ||||
| 18. | Sanderling | 3 | 3 | 0 | 3 | 3 (11 Jan) | 33 | 1 | 11 Jan | 11 Jan | ||||
| 19. | Black-headed Gull | 85 | 85 | 22 | 63 | 70 (11 Jan) | 100 | 3 | 2 Jan | 22 Jan | ||||
| 20. | Common Gull | 43 | 43 | 24 | 19 | 29 ( 2 Jan) | 100 | 3 | 2 Jan | 22 Jan | ||||
| 21. | Lesser Black-backed Gull | 1 | 1 | 1 | 0 | 1 (11 Jan) | 33 | 1 | 11 Jan | 11 Jan | ||||
| 22. | Red-throated Diver | 131 | 131 | 127 | 4 | 131 (22 Jan) | 33 | 1 | 22 Jan | 22 Jan | ||||
| 23. | diver sp. | 127 | 127 | 93 | 34 | 67 (11 Jan) | 67 | 2 | 2 Jan | 11 Jan | ||||
| 24. | Gannet | 25 | 25 | 21 | 4 | 13 ( 2 Jan) | 100 | 3 | 2 Jan | 22 Jan | ||||
| 25. | Snow Bunting | 1 | 1 | 1 | 0 | 1 (11 Jan) | 33 | 1 | 11 Jan | 11 Jan | ||||
| Other species | ||||||||||||||
| Species | Jan | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| 1. | Harbour Porpoise | 5 | 5 | 1 | 4 | 4 (22 Jan) | 67 | 2 | 11 Jan | 22 Jan | ||||
| Species | Jan | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| Totals | 1549 | 1549 | 1187 | 362 | 100 | 3 | ||||||||
| Observation hours | 5:30 | 5:30 | ||||||||||||
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