Número de parellas reprodutoras de gaivota escura (Larus fuscus) nas illas do Parque Nacional. Breeding population of the Lesser black-backed gull in the National Park of the Atlantic Islands of Galicia.
| Vionta | Sálvora | Ons | Cíes | TOTAL PARQUE | |
| 2024 | 1 | 31 | 0 | 0 | 32 |
| 2023 | 1 | 29 | 0 | 0 | 30 |
| 2022 | 0 | 27 | 0 | 0 | 27 |
| 2021 | 1 | 25 | 1 | 0 | 27 |
| 2020 | 1 | 27 | 0 | 0 | 28 |
| 2019 | 0 | 28 | 0 | 0 | 28 |
| 2018 | 1 | 23 | 0 | 0 | 24 |
| 2017 | 1 | 20 | 0 | 1 | 22 |
| 2016 | 1 | 27 | 0 | 0 | 28 |
| 2015 | 2 | 26 | 1 | 0 | 29 |
| 2011 | 5 | 35 | 4 | 0 | 44 |
| … | – | – | – | – | – |
| 2004 | 86 | ||||
| … | – | – | – | – | – |
| 1977 | 4 |
MARDEAVES 