Data Zone
The site was identified as internationally important for bird conservation in 2010 because it was regularly supporting significant populations of the species listed below, meeting IBA criteria.
Populations meeting IBA criteria ('key species') at the site:| Species | Red List | Season (year/s of estimate) | Size | IBA criteria |
|---|---|---|---|---|
| Southern Rockhopper Penguin Eudyptes chrysocome | VU | breeding (2007) | 86,400 breeding pairs | A1, A4ii |
| Black-browed Albatross Thalassarche melanophris | LC | breeding (2007) | 47,000 breeding pairs | A1, A4ii |
| A4iii Species group - seabirds | n/a | breeding (2007) | 100,000-499,999 breeding pairs | A4iii |
Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2010. The most recent assessment (2015) is shown below.
| IBA conservation status | |||
|---|---|---|---|
| Year of assessment | State | Pressure | Response |
| 2015 | favourable | low | medium |
| Whole site assessed? | State assessed by | Accuracy of information | |
| yes | habitat | medium | |
| State (condition of the key species' habitats) | |||
|---|---|---|---|
| Habitat | Quantity (% remaining) | Quality (% carrying capacity) | Result |
| Marine Coastal/Supratidal | - | good (>90%) | favourable |
| Pressure (threats to the key species and/or their habitats) | ||||
|---|---|---|---|---|
| Threat | Timing | Scope | Severity | Result |
| No known threats | past (and unlikely to return) and no longer limiting | few individuals/small area (<10%) | no deterioration (<1% over 3 generations) | low |
| Response (conservation actions taken for the key species and/or their habitats) | |||
|---|---|---|---|
| Designation | Planning | Action | Result |
| Whole area of site (>90%) covered by appropriate conservation designation | A management plan exists, but it is out of date or not comprehensive | Substantive conservation measures are being implemented, but these are not comprehensive and are limited by resources and capacity | medium |
| Year | Protected Area | Designation (management category) | % coverage of IBA |
|---|---|---|---|
| 2005 | Cabo de Hornos | UNESCO-MAB Biosphere Reserve (UA) | 100 |
| Habitat | % of IBA | Habitat detail |
|---|---|---|
| Marine Coastal/Supratidal | - |
Recommended citation
BirdLife International (2025) Important Bird Area factsheet: Islas Ildefonso (Chile). Downloaded from
https://datazone.birdlife.org/site/factsheet/islas-ildefonso-iba-chile on 06/01/2025.