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 |
|---|---|---|---|---|---|
| Fork-tailed Storm-petrel Hydrobates furcatus | LC | breeding | 1974-2009 | 123,000 individuals | A4i |
| Leach's Storm-petrel Hydrobates leucorhous | VU | breeding | 1974-2009 | 114,000 individuals | A4ii |
| Northern Fulmar Fulmarus glacialis | LC | breeding | 1974-2009 | 440,000 individuals | A4ii |
| Black-legged Kittiwake Rissa tridactyla | VU | breeding | 1974-2009 | 71,700 individuals | A4i |
| Tufted Puffin Fratercula cirrhata | LC | breeding | 1974-2009 | 99,600 individuals | A4ii |
| Horned Puffin Fratercula corniculata | LC | breeding | 1974-2009 | 370,200 individuals | A4ii |
| Parakeet Auklet Aethia psittacula | LC | breeding | 1974-2009 | 29,600 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 | 93 |
| 1980 | Semidi | Wilderness | 93 |
Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Semidi Islands Colonies (USA). Downloaded from
https://datazone.birdlife.org/site/factsheet/semidi-islands-colonies-iba-usa on 22/11/2024.