Data Zone
The site was identified as important 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 List1 | Season | Year(s) | Size | IBA criteria |
|---|---|---|---|---|---|
| Ashy Storm-petrel Hydrobates homochroa | EN | breeding | 1974-2009 | 1,990 individuals | A1, A4ii |
| Brandt's Cormorant Urile penicillatus | LC | breeding | 1974-2009 | 17,116 individuals | A4i |
| Western Gull Larus occidentalis | LC | breeding | 1974-2009 | 15,127 individuals | A4i |
| Common Murre Uria aalge | LC | breeding | 1974-2009 | 199,268 individuals | A4ii |
1. The current IUCN Red List category. The category at the time of the IBA criteria assessment (2012) may differ.
| Year | Protected Area | Designation | % overlap with IBA |
|---|---|---|---|
| 1909 | Farallon | National Wildlife Refuge | 1 |
| 1974 | Farallon Islands | ASBS State Water Quality Protection Area | 49 |
| 1981 | Greater Farallones | National Marine Sanctuary | 100 |
| 2010 | Southeast Farallon Island | State Marine Reserve | 14 |
| 2010 | North Farallon Islands | State Marine Reserve | 13 |
| 2010 | Southeast Farallon Island | State Marine Conservation Area | 4 |
| 2010 | North Farallon Islands | Special Closure | 1 |
| 2010 | Southeast Farallon | Special Closure A | <1 |
| 2010 | Southeast Farallon | Special Closure B | <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 23/11/2024.