| Species | Date | Count | Location | Observer | Checklist |
|---|---|---|---|---|---|
| Grey Phalarope Phalaropus fulicarius | 24th May 2025 8:07 a.m. | 1 | Montanha Camões Sintra, Lisboa | Jose Paulo Monteiro | |
| Arctic Skua Stercorarius parasiticus | 24th May 2025 8:07 a.m. | 2 | Montanha Camões Sintra, Lisboa | Jose Paulo Monteiro | |
| Pomarine Skua Stercorarius pomarinus | 24th May 2025 8:07 a.m. | 1 | Montanha Camões Sintra, Lisboa | Jose Paulo Monteiro | |
| Great Skua Stercorarius skua | 24th May 2025 5:49 a.m. | 1 | Montanha Camões Sintra, Lisboa | Jose Paulo Monteiro | |
| Sabine's Gull Xema sabini | 24th May 2025 8:07 a.m. | 6 | Montanha Camões Sintra, Lisboa | Jose Paulo Monteiro | |
| Yellow-legged Gull Larus michahellis | 24th May 2025 5:49 a.m. | 5 | Montanha Camões Sintra, Lisboa | Jose Paulo Monteiro | |
| Lesser Black-backed Gull Larus fuscus | 24th May 2025 8:07 a.m. | X | Montanha Camões Sintra, Lisboa | Jose Paulo Monteiro | |
| Arctic Tern Sterna paradisaea | 24th May 2025 8:07 a.m. | 2 | Montanha Camões Sintra, Lisboa | Jose Paulo Monteiro | |
| Common Tern Sterna hirundo | 24th May 2025 5:49 a.m. | 17 | Montanha Camões Sintra, Lisboa | Jose Paulo Monteiro | |
| Sandwich Tern Thalasseus sandvicensis | 24th May 2025 8:07 a.m. | 1 | Montanha Camões Sintra, Lisboa | Jose Paulo Monteiro | |
| Wilson's Storm-Petrel Oceanites oceanicus | 24th May 2025 8:07 a.m. | 18 | Montanha Camões Sintra, Lisboa | Jose Paulo Monteiro | |
| European Storm-Petrel Hydrobates pelagicus | 24th May 2025 5:49 a.m. | 12 | Montanha Camões Sintra, Lisboa | Jose Paulo Monteiro | |
| Cory's Shearwater Calonectris borealis | 24th May 2025 8:07 a.m. | 19 | Montanha Camões Sintra, Lisboa | Jose Paulo Monteiro | |
| Scopoli's Shearwater Calonectris diomedea | 24th May 2025 8:07 a.m. | 1 | Montanha Camões Sintra, Lisboa | Jose Paulo Monteiro | |
| Balearic Shearwater Puffinus mauretanicus | 24th May 2025 5:49 a.m. | 9 | Montanha Camões Sintra, Lisboa | Jose Paulo Monteiro | |
| Northern Gannet Morus bassanus | 24th May 2025 5:49 a.m. | 6 | Montanha Camões Sintra, Lisboa | Jose Paulo Monteiro |
1, Grey Phalarope(Phalaropus fulicarius)
2, Arctic Skua(Stercorarius parasiticus)
1, Pomarine Skua(Stercorarius pomarinus)
1, Great Skua(Stercorarius skua)
6, Sabine's Gull(Xema sabini)
5, Yellow-legged Gull(Larus michahellis)
X, Lesser Black-backed Gull(Larus fuscus)
2, Arctic Tern(Sterna paradisaea)
17, Common Tern(Sterna hirundo)
1, Sandwich Tern(Thalasseus sandvicensis)
18, Wilson's Storm-Petrel(Oceanites oceanicus)
12, European Storm-Petrel(Hydrobates pelagicus)
19, Cory's Shearwater(Calonectris borealis)
1, Scopoli's Shearwater(Calonectris diomedea)
9, Balearic Shearwater(Puffinus mauretanicus)
6, Northern Gannet(Morus bassanus)