| 1 | Common Scoter
Melanitta nigra | 9th Feb 2025
7:33 a.m. | 8 | Montanha Camões
Sintra, Lisboa | Hugo Blanco | |
| 2 | Grey Phalarope
Phalaropus fulicarius | 24th May 2025
8:07 a.m. | 1 | Montanha Camões
Sintra, Lisboa | Hugo Blanco | |
| 3 | Arctic Skua
Stercorarius parasiticus | 9th Feb 2025
7:33 a.m. | 1 | Montanha Camões
Sintra, Lisboa | Hugo Blanco | |
| 4 | Pomarine Skua
Stercorarius pomarinus | 24th May 2025
8:07 a.m. | 1 | Montanha Camões
Sintra, Lisboa | Hugo Blanco | |
| 5 | Great Skua
Stercorarius skua | 9th Feb 2025
7:33 a.m. | 3 | Montanha Camões
Sintra, Lisboa | Hugo Blanco | |
| 6 | Atlantic Puffin
Fratercula arctica | 9th Feb 2025
7:33 a.m. | 5 | Montanha Camões
Sintra, Lisboa | Hugo Blanco | |
| 7 | Razorbill
Alca torda | 9th Feb 2025
7:33 a.m. | 14 | Montanha Camões
Sintra, Lisboa | Hugo Blanco | |
| 8 | Common Guillemot
Uria aalge | 9th Feb 2025
7:33 a.m. | 1 | Montanha Camões
Sintra, Lisboa | Hugo Blanco | |
| 9 | Sabine's Gull
Xema sabini | 24th May 2025
8:07 a.m. | 6 | Montanha Camões
Sintra, Lisboa | Hugo Blanco | |
| 10 | Black-headed Gull
Chroicocephalus ridibundus | 9th Feb 2025
7:33 a.m. | 1 | Montanha Camões
Sintra, Lisboa | Hugo Blanco | |
| 11 | Mediterranean Gull
Ichthyaetus melanocephalus | 9th Feb 2025
7:33 a.m. | X | Montanha Camões
Sintra, Lisboa | Hugo Blanco | |
| 12 | Yellow-legged Gull
Larus michahellis | 24th May 2025
8:07 a.m. | X | Montanha Camões
Sintra, Lisboa | Hugo Blanco | |
| 13 | Lesser Black-backed Gull
Larus fuscus | 24th May 2025
8:07 a.m. | X | Montanha Camões
Sintra, Lisboa | Hugo Blanco | |
| 14 | Arctic Tern
Sterna paradisaea | 24th May 2025
8:07 a.m. | 2 | Montanha Camões
Sintra, Lisboa | Hugo Blanco | |
| 15 | Common Tern
Sterna hirundo | 24th May 2025
8:07 a.m. | 56 | Montanha Camões
Sintra, Lisboa | Hugo Blanco | |
| 16 | Sandwich Tern
Thalasseus sandvicensis | 9th Feb 2025
7:33 a.m. | 3 | Montanha Camões
Sintra, Lisboa | Hugo Blanco | |
| 17 | Wilson's Storm-Petrel
Oceanites oceanicus | 24th May 2025
8:07 a.m. | 18 | Montanha Camões
Sintra, Lisboa | Hugo Blanco | |
| 18 | European Storm-Petrel
Hydrobates pelagicus | 9th Feb 2025
7:33 a.m. | 8 | Montanha Camões
Sintra, Lisboa | Hugo Blanco | |
| 19 | Cory's Shearwater
Calonectris borealis | 24th May 2025
8:07 a.m. | 19 | Montanha Camões
Sintra, Lisboa | Hugo Blanco | |
| 20 | Balearic Shearwater
Puffinus mauretanicus | 9th Feb 2025
7:33 a.m. | 20 | Montanha Camões
Sintra, Lisboa | Hugo Blanco | |
| 21 | Northern Gannet
Morus bassanus | 9th Feb 2025
7:33 a.m. | X | Montanha Camões
Sintra, Lisboa | Hugo Blanco | |