Select until 9 November
Totals Delta de la Tordera 2016 - 2025
| | Species | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | Totals | Average | Present | Year Maximum | |
| 1. | Shelduck | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 2 | 0.7 | 0 | 2 (2024) | | | | |
| 2. | Garganey | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 6 | 9 | 3 | 0 | 6 (2025) | | | | |
| 3. | Shoveler | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 0 | 3 | 1 | 0 | 3 (2024) | | | | |
| 4. | Mallard | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0.3 | 0 | 1 (2025) | | | | |
| 5. | Pintail | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 14 | 14 | 4.7 | 0 | 14 (2025) | | | | |
| 6. | duck sp. | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 0 | 3 | 1 | 0 | 3 (2024) | | | | |
| 7. | Pochard | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 4 | 6 | 2 | 0 | 4 (2025) | | | | |
| 8. | Nightjar | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0.3 | 0 | 1 (2024) | | | | |
| 9. | Swift / Pallid Swift | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0.3 | 0 | 1 (2025) | | | | |
| 10. | Apus sp. | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 6 | 0 | 6 | 2 | 0 | 6 (2024) | | | | |
| 11. | Crane | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 162 | 162 | 54 | 0 | 162 (2025) | | | | |
| 12. | Oystercatcher | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0.3 | 0 | 1 (2025) | | | | |
| 13. | Little Ringed Plover | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 1 | 3 | 1 | 0 | 2 (2024) | | | | |
| 14. | Kentish Plover | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0.3 | 0 | 1 (2025) | | | | |
| 15. | Temminck's Stint | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0.3 | 0 | 1 (2024) | | | | |
| 16. | Sanderling | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 0 | 3 | 1 | 0 | 3 (2024) | | | | |
| 17. | Gull-billed Tern | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0.3 | 0 | 1 (2024) | | | | |
| 18. | Caspian Tern | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 3 | 1 | 0 | 3 (2025) | | | | |
| 19. | Common Tern | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 112 | 113 | 38 | 0 | 112 (2025) | | | | |
| 20. | Sandwich Tern | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 21 | 82 | 172 | 275 | 92 | 1 | 172 (2025) | | | | |
| 21. | Little Gull | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 258 | 46 | 304 | 101 | 100 | 258 (2024) | | | | |
| 22. | Kittiwake | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0.3 | 0 | 1 (2024) | | | | |
| 23. | Black-headed Gull | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 152 | 320 | 404 | 876 | 292 | 0 | 404 (2025) | | | | |
| 24. | small gull sp. | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 4 | 0 | 4 | 1.3 | 0 | 4 (2024) | | | | |
| 25. | Audouin's Gull | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 81 | 131 | 212 | 71 | 0 | 131 (2025) | | | | |
| 26. | Mediterranean Gull | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 85 | 114 | 258 | 457 | 152 | 135 | 258 (2025) | | | | |
| 27. | Herring Gull (subsp. argentatus) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 31 | 0 | 31 | 10.3 | 1 | 31 (2024) | | | | |
| 28. | Yellow-legged Gull | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 110 | 601 | 398 | 1109 | 370 | 4 | 601 (2024) | | | | |
| 29. | Lesser Black-backed Gull | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0.3 | 0 | 1 (2025) | | | | |
| 30. | Larus graellsii | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 4 | 0 | 4 | 1.3 | 0 | 4 (2024) | | | | |
| 31. | Larus intermedius | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0.3 | 0 | 1 (2025) | | | | |
| 32. | Laridae sp. | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 27 | 60 | 87 | 29 | 0 | 60 (2025) | | | | |
| 33. | skua sp. | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 2 | 0.7 | 0 | 2 (2024) | | | | |
| 34. | Arctic Skua | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 6 | 9 | 3 | 0 | 6 (2025) | | | | |
| 35. | S. parasiticus / pomarinus | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0.3 | 0 | 1 (2024) | | | | |
| 36. | Pomarine Skua | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 2 | 5 | 1.7 | 0 | 3 (2024) | | | | |
| 37. | Puffin | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 2 | 0.7 | 0 | 1 (2024) | | | | |
| 38. | Razorbill | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 24 | 0 | 24 | 8 | 0 | 24 (2024) | | | | |
| 39. | alca / fratercula spec | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0.3 | 0 | 1 (2024) | | | | |
| 40. | Cory's Shearwater | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 17 | 0 | 17 | 5.7 | 0 | 17 (2024) | | | | |
| 41. | Scopoli's Shearwater | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 20 | 415 | 613 | 1048 | 349 | 4 | 613 (2025) | | | | |
| 42. | Yelkouan Shearwater | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 25 | 1601 | 5849 | 7475 | 2492 | 0 | 5849 (2025) | | | | |
| 43. | Balearic Shearwater | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 44 | 316 | 1382 | 1742 | 581 | 0 | 1382 (2025) | | | | |
| 44. | Balearic-/Yelkouan Shearwater | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 47 | 1016 | 1601 | 2664 | 888 | 4 | 1601 (2025) | | | | |
| 45. | Gannet | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 39 | 85 | 81 | 205 | 68 | 0 | 85 (2024) | | | | |
| 46. | Cormorant | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 15 | 25 | 40 | 13.3 | 0 | 25 (2025) | | | | |
| 47. | Cormorant (p. c. carbo) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 26 | 20 | 38 | 84 | 28 | 0 | 38 (2025) | | | | |
| 48. | sinensis Cormorant (P.c.sinensis) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 20 | 0 | 20 | 6.7 | 0 | 20 (2024) | | | | |
| 49. | Shag | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 19 | 114 | 119 | 252 | 84 | 3 | 119 (2025) | | | | |
| 50. | Glossy Ibis | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 318 | 0 | 318 | 106 | 0 | 318 (2024) | | | | |
| | Species | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | Totals | Average | Present | Year Maximum | |
| 51. | Little Egret | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0.3 | 0 | 1 (2025) | | | | |
| 52. | Great White Egret | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0.3 | 0 | 1 (2025) | | | | |
| 53. | Grey Heron | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 2 | 0.7 | 0 | 2 (2025) | | | | |
| 54. | Swallow | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 72 | 5 | 77 | 25.7 | 0 | 72 (2024) | | | | |
| 55. | Wheatear | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0.3 | 0 | 1 (2025) | | | | |
| 56. | Species unidentified | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0.3 | 0 | 1 (2024) | | | | |
| Other species |
| 1. | Bottle-Nosed Dolphin | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 12 | 0 | 12 | 4 | 0 | 12 (2024) | | | | |
| | Species | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | Totals | Average | Present | Year Maximum | |
| |
Totals |
0 | 0 | 0 | 0 | 0 | 0 | 0 | 588 | 5608 | 11504 | 17700 | 5900 | 252 | | |
| |
Observation hours |
| | | | | | | 4:25 | 29:48 | 27:22 | 61:35 | 20:32 | | | |