Data Zone
The site was identified as important in 2002 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 |
|---|---|---|---|---|---|
| White Stork Ciconia ciconia | LC | resident | 1996 | 50-70 breeding pairs | C6 |
| Common Little Bittern Ixobrychus minutus | LC | breeding | 1996 | common | C6 |
| Purple Heron Ardea purpurea | LC | breeding | 2002 | 15 breeding pairs | B2, C6 |
| Little Egret Egretta garzetta | LC | non-breeding | 1996 | common | C6 |
| Great Cormorant Phalacrocorax carbo | LC | winter | 1996 | 1,000-2,200 individuals | B1i, C3 |
| Pied Avocet Recurvirostra avosetta | LC | winter | 1996 | 2,000-4,000 individuals | A4i, B1i, B2, C2 |
| Black-winged Stilt Himantopus himantopus | LC | breeding | 1996 | 200-800 breeding pairs | A4i, B1i, C2, C6 |
| Black-tailed Godwit Limosa limosa | NT | winter | 1996 | 2,000-11,000 individuals | B1i, C3 |
| Dunlin Calidris alpina | NT | winter | 1996 | 12,000-16,000 individuals | B1i, B2, C3 |
| Collared Pratincole Glareola pratincola | LC | breeding | 1996 | 5-20 breeding pairs | C6 |
| Little Tern Sternula albifrons | LC | breeding | 1996 | 50-100 breeding pairs | B2, C6 |
| Western Marsh-harrier Circus aeruginosus | LC | resident | 1996 | 5-6 breeding pairs | C6 |
| A4iii Species group - waterbirds | n/a | winter | 1996 | min 20,000 individuals | A4iii, C4 |
1. The current IUCN Red List category. The category at the time of the IBA criteria assessment (2002) may differ.
| Year | Protected Area | Designation | % overlap with IBA |
|---|---|---|---|
| 1980 | Estuário do Sado | Reserva Natural | 81 |
| 1988 | Estuário do Sado | Special Protection Area (Birds Directive) | 99 |
| 1988 | Açude da Murta | Special Protection Area (Birds Directive) | <1 |
| 1996 | Estuário do Sado | Ramsar Site, Wetland of International Importance | 100 |
| 1997 | Estuário do Sado | Site of Community Importance (Habitats Directive) | 95 |
| Habitat1 | Habitat detail | % of IBA |
|---|---|---|
| Artificial/Terrestrial | Arable land, Forestry plantations, Other urban and industrial areas | - |
| Forest | Mixed woodland, Broadleaved evergreen woodland | - |
| Marine Coastal/Supratidal | - | |
| Marine Intertidal | - | |
| Marine Neritic | - | |
| Shrubland | Sclerophyllous scrub, garrigue and maquis | - |
| Land use | % of IBA |
|---|---|
| agriculture | - |
| fisheries/aquaculture | - |
| forestry | - |
| hunting | - |
| nature conservation and research | - |
| tourism/recreation | - |
| urban/industrial/transport | - |
Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Sado estuary (Portugal). Downloaded from
https://datazone.birdlife.org/site/factsheet/sado-estuary-iba-portugal on 23/11/2024.