Data Zone
The site was identified as internationally important for bird conservation in 2008 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 |
|---|---|---|---|---|
| Greater Rhea Rhea americana | NT | resident (1991–1998) | 30 birds | A1 |
| Coscoroba Swan Coscoroba coscoroba | LC | resident (1991–1998) | 60–325 birds | A4i |
| Black-necked Swan Cygnus melancoryphus | LC | resident (1987–1999) | 20–1,442 birds | A4i |
| Buff-breasted Sandpiper Calidris subruficollis | VU | winter (1999) | 300 birds | A1, A4i |
| Curve-billed Reedhaunter Limnornis curvirostris | LC | resident (1999) | uncommon | A3 |
| Straight-billed Reedhaunter Limnoctites rectirostris | NT | resident (1999–2008) | 90 birds | A1, A2 |
| Sulphur-throated Spinetail Limnoctites sulphuriferus | LC | resident (1999) | present | A3 |
| Bay-capped Wren-spinetail Spartonoica maluroides | LC | resident (1999) | 90 birds | A1, A3 |
| Black-and-white Monjita Xolmis dominicanus | VU | resident (1999) | 90 birds | A1 |
| Saffron-cowled Blackbird Xanthopsar flavus | EN | resident (1999–2007) | 90 birds | A1 |
| A4iii Species group - waterbirds | n/a | unknown (-) | 20,000-49,999 birds | A4iii |
| Year | Protected Area | Designation (management category) | % coverage of IBA |
|---|---|---|---|
| - | Humedales del Este | Other Area (-) | 100 |
| 1976 | Bañados del Este y Franja Costera | UNESCO-MAB Biosphere Reserve (UA) | 100 |
| 1976 | Bañados del Este | UNESCO-MAB Biosphere Reserve (UA) | 100 |
| 2009 | Cabo Polonio | Parque Nacional (II) | 2 |
| Habitat | % of IBA | Habitat detail |
|---|---|---|
| Grassland | major (>10) | Campo grassland |
| Marine Coastal/Supratidal | major (>10) |
| Land use | % of IBA |
|---|---|
| rangeland/pastureland | major (>10) |
| tourism/recreation | major (>10) |
| fisheries/aquaculture | major (>10) |
Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Castillos Lagoon (Uruguay). Downloaded from
https://datazone.birdlife.org/site/factsheet/castillos-lagoon-iba-uruguay on 23/12/2024.