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 |
|---|---|---|---|---|---|
| Little Bustard Tetrax tetrax | NT | resident | 1996 | 100-150 individuals | A1, C1 |
| Great Bustard Otis tarda | EN | resident | 2002 | 16-32 individuals | A1, C1 |
| Eurasian Thick-knee Burhinus oedicnemus | LC | resident | 2001 | 20-30 breeding pairs | B2, C6 |
1. The current IUCN Red List category. The category at the time of the IBA criteria assessment (2002) may differ.
| Habitat1 | Habitat detail | % of IBA |
|---|---|---|
| Artificial/Terrestrial | Arable land, Perennial crops, orchards and groves | 90 |
| Forest | Broadleaved evergreen woodland | 10 |
| Land use | % of IBA |
|---|---|
| agriculture | 90 |
| forestry | 10 |
Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Alter do Chão (Portugal). Downloaded from
https://datazone.birdlife.org/site/factsheet/alter-do-chão-iba-portugal on 23/11/2024.