Data Zone
The site was identified as internationally important for bird conservation 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 List | Season (year/s of estimate) | Size | IBA criteria |
|---|---|---|---|---|
| Greater Flamingo Phoenicopterus roseus | LC | winter (2000) | 1–100 birds | C6 |
| Purple Heron Ardea purpurea | LC | breeding (2001) | common | C6 |
| Pied Avocet Recurvirostra avosetta | LC | resident (2001) | 1–2 pairs | C6 |
| Pied Avocet Recurvirostra avosetta | LC | winter (2001) | 10–100 birds | C6 |
| Black-winged Stilt Himantopus himantopus | LC | resident (2001) | 40–300 pairs | C6 |
| Black-winged Stilt Himantopus himantopus | LC | winter (2001) | 1–50 birds | C6 |
| Collared Pratincole Glareola pratincola | LC | breeding (2001) | 10–40 pairs | B2, C6 |
| Little Tern Sternula albifrons | LC | breeding (2000) | frequent | C6 |
| Western Marsh-harrier Circus aeruginosus | LC | resident (1998) | common | C6 |
Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2002. The most recent assessment (2017) is shown below.
| IBA conservation assessment | |||
|---|---|---|---|
| Year of assessment | State | Pressure | Response |
| 2017 | not assessed | very high | not assessed |
| Whole site assessed? | State assessed by | Accuracy of information | |
| yes | unset | good | |
| Pressure (threats to the trigger species and/or their habitats) | ||||
|---|---|---|---|---|
| Threat | Timing | Scope | Severity | Result |
| Residential and commercial development | happening now | most of population/area (50–90%) | rapid decline (>30% over 3 generations) | very high |
| Transportation and service corridors | likely in short term (<4 years) | some of population/area (10–49%) | moderate decline (10–30% over 3 generations) | medium |
| Response (conservation actions taken for the trigger species and/or their habitats) | |||
|---|---|---|---|
| Designation | Planning | Action | Result |
| Little/none of area covered (<10%) | No management planning has taken place | Very little or no conservation action taking place | not assessed |
| Habitat | % of IBA | Habitat detail |
|---|---|---|
| Artificial/Aquatic & Marine | - | |
| Artificial/Terrestrial | - | Arable land; Other urban and industrial areas |
| Marine Coastal/Supratidal | - | |
| Shrubland | - | Sclerophyllous scrub, garrigue and maquis |
| Land use | % of IBA |
|---|---|
| agriculture | - |
| hunting | - |
| military | - |
| tourism/recreation | - |
| urban/industrial/transport | - |
| water management | - |
Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Salinas de Alverca e do Forte da Casa (Portugal). Downloaded from
https://datazone.birdlife.org/site/factsheet/salinas-de-alverca-e-do-forte-da-casa-iba-portugal on 23/12/2024.