Data Zone
The site was identified as internationally important for bird conservation in 2012 because it was regularly supporting significant populations of the species listed below, meeting ('triggering') IBA criteria.
Populations meeting IBA criteria ('trigger species') at the site:| Species | Red List | Season (year/s of estimate) | Size | IBA criteria |
|---|---|---|---|---|
| Ashy Storm-petrel Hydrobates homochroa | EN | breeding (1974–2009) | 1,990 birds | A1, A4ii |
| Brandt's Cormorant Urile penicillatus | LC | breeding (1974–2009) | 17,116 birds | A4i |
| Western Gull Larus occidentalis | LC | breeding (1974–2009) | 15,127 birds | A4i |
| Common Murre Uria aalge | LC | breeding (1974–2009) | 199,268 birds | A4ii |
| Year | Protected Area | Designation (management category) | % coverage of IBA |
|---|---|---|---|
| 1909 | Farallon | National Wildlife Refuge (Ia) | 1 |
| 1974 | Farallon Islands | ASBS State Water Quality Protection Area (V) | 49 |
| 1981 | Greater Farallones | National Marine Sanctuary (V) | 100 |
| 2010 | Southeast Farallon Island | State Marine Reserve (Ia) | 14 |
| 2010 | North Farallon Islands | State Marine Reserve (Ia) | 13 |
| 2010 | Southeast Farallon Island | State Marine Conservation Area (V) | 4 |
| 2010 | North Farallon Islands | Special Closure (Ia) | 1 |
| 2010 | Southeast Farallon | Special Closure A (Ia) | <1 |
| 2010 | Southeast Farallon | Special Closure B (Ia) | <1 |
Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Farallon Islands (USA). Downloaded from
https://datazone.birdlife.org/site/factsheet/farallon-islands-iba-usa on 25/12/2024.