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) | 20 | 1 | 2 Jan | 2 Jan | ||||
| 2. | Barnacle Goose | 187 | 187 | 54 | 133 | 121 (26 Jan) | 40 | 2 | 22 Jan | 26 Jan | ||||
| 3. | Greylag Goose | 3 | 3 | 3 | 0 | 2 (26 Jan) | 40 | 2 | 22 Jan | 26 Jan | ||||
| 4. | Pink-footed Goose | 134 | 134 | 36 | 98 | 98 (22 Jan) | 40 | 2 | 22 Jan | 26 Jan | ||||
| 5. | Eurasian White-fronted Goose | 5 | 5 | 1 | 4 | 4 (22 Jan) | 40 | 2 | 22 Jan | 31 Jan | ||||
| 6. | Egyptian Goose | 2 | 2 | 1 | 1 | 2 (22 Jan) | 20 | 1 | 22 Jan | 22 Jan | ||||
| 7. | Shelduck | 7 | 7 | 0 | 7 | 7 ( 2 Jan) | 20 | 1 | 2 Jan | 2 Jan | ||||
| 8. | Wigeon | 355 | 355 | 334 | 21 | 333 (22 Jan) | 80 | 4 | 2 Jan | 26 Jan | ||||
| 9. | Pintail | 1 | 1 | 1 | 0 | 1 (22 Jan) | 20 | 1 | 22 Jan | 22 Jan | ||||
| 10. | Teal | 21 | 21 | 17 | 4 | 13 (22 Jan) | 60 | 3 | 2 Jan | 22 Jan | ||||
| 11. | Tufted Duck | 2 | 2 | 2 | 0 | 2 (22 Jan) | 20 | 1 | 22 Jan | 22 Jan | ||||
| 12. | Aythya sp. | 1 | 1 | 0 | 1 | 1 (26 Jan) | 20 | 1 | 26 Jan | 26 Jan | ||||
| 13. | Eider | 14 | 14 | 13 | 1 | 7 (11 Jan) | 100 | 5 | 2 Jan | 31 Jan | ||||
| 14. | Velvet Scoter | 28 | 28 | 28 | 0 | 27 ( 2 Jan) | 40 | 2 | 2 Jan | 31 Jan | ||||
| 15. | Common Scoter | 393 | 393 | 291 | 102 | 258 ( 2 Jan) | 100 | 5 | 2 Jan | 31 Jan | ||||
| 16. | Smew | 3 | 3 | 3 | 0 | 2 (22 Jan) | 40 | 2 | 11 Jan | 22 Jan | ||||
| 17. | Red-necked Grebe | 1 | 1 | 1 | 0 | 1 (22 Jan) | 20 | 1 | 22 Jan | 22 Jan | ||||
| 18. | Great Crested Grebe | 212 | 212 | 205 | 7 | 181 (22 Jan) | 60 | 3 | 2 Jan | 26 Jan | ||||
| 19. | Sanderling | 3 | 3 | 0 | 3 | 3 (11 Jan) | 20 | 1 | 11 Jan | 11 Jan | ||||
| 20. | Black-headed Gull | 102 | 102 | 37 | 65 | 70 (11 Jan) | 100 | 5 | 2 Jan | 31 Jan | ||||
| 21. | Common Gull | 49 | 49 | 29 | 20 | 29 ( 2 Jan) | 100 | 5 | 2 Jan | 31 Jan | ||||
| 22. | Great Black-backed Gull | 1 | 1 | 1 | 0 | 1 (31 Jan) | 20 | 1 | 31 Jan | 31 Jan | ||||
| 23. | Lesser Black-backed Gull | 1 | 1 | 1 | 0 | 1 (11 Jan) | 20 | 1 | 11 Jan | 11 Jan | ||||
| 24. | Red-throated Diver | 175 | 175 | 169 | 6 | 131 (22 Jan) | 60 | 3 | 22 Jan | 31 Jan | ||||
| 25. | Black-throated Diver | 1 | 1 | 0 | 1 | 1 (31 Jan) | 20 | 1 | 31 Jan | 31 Jan | ||||
| 26. | diver sp. | 187 | 187 | 143 | 44 | 67 (11 Jan) | 60 | 3 | 2 Jan | 26 Jan | ||||
| 27. | Gannet | 29 | 29 | 25 | 4 | 13 ( 2 Jan) | 100 | 5 | 2 Jan | 31 Jan | ||||
| 28. | Snow Bunting | 1 | 1 | 1 | 0 | 1 (11 Jan) | 20 | 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) | 40 | 2 | 11 Jan | 22 Jan | ||||
| Species | Jan | Totals | S | N | Maximum | Presence (%) | Presence (days) | First | Last | |||||
| Totals | 1940 | 1940 | 1397 | 543 | 100 | 5 | ||||||||
| Observation hours | 7:30 | 7:30 | ||||||||||||
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