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 |
|---|---|---|---|---|
| Black-legged Kittiwake Rissa tridactyla | VU | breeding (1974–2009) | 22,300 birds | A4i |
| Tufted Puffin Fratercula cirrhata | LC | breeding (1974–2009) | 80,015 birds | A4ii |
| Horned Puffin Fratercula corniculata | LC | breeding (1974–2009) | 60,050 birds | A4ii |
| Cassin's Auklet Ptychoramphus aleuticus | NT | breeding (1974–2009) | 46,000 birds | A4ii |
| Parakeet Auklet Aethia psittacula | LC | breeding (1974–2009) | 14,050 birds | A4ii |
| Ancient Murrelet Synthliboramphus antiquus | LC | breeding (1974–2009) | 30,000 birds | A4ii |
| Year | Protected Area | Designation (management category) | % coverage of IBA |
|---|---|---|---|
| 1980 | Alaska Maritime | National Wildlife Refuge (IV) | 4 |
Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Castle Rock Colonies (USA). Downloaded from
https://datazone.birdlife.org/site/factsheet/castle-rock-colonies-iba-usa on 23/12/2024.