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 |
|---|---|---|---|---|---|
| Black-legged Kittiwake Rissa tridactyla | VU | breeding | 1974-2009 | 22,300 individuals | A4i |
| Tufted Puffin Fratercula cirrhata | LC | breeding | 1974-2009 | 80,015 individuals | A4ii |
| Horned Puffin Fratercula corniculata | LC | breeding | 1974-2009 | 60,050 individuals | A4ii |
| Cassin's Auklet Ptychoramphus aleuticus | NT | breeding | 1974-2009 | 46,000 individuals | A4ii |
| Parakeet Auklet Aethia psittacula | LC | breeding | 1974-2009 | 14,050 individuals | A4ii |
| Ancient Murrelet Synthliboramphus antiquus | LC | breeding | 1974-2009 | 30,000 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 |
|---|---|---|---|
| 1980 | Alaska Maritime | National Wildlife Refuge | 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 22/11/2024.