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