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 |
|---|---|---|---|---|
| Ferruginous Duck Aythya nyroca | NT | breeding (2002) | 1–2 pairs | B2, C6 |
| Purple Swamphen Porphyrio porphyrio | LC | resident (2000) | 6–10 pairs | C6 |
| Eurasian Spoonbill Platalea leucorodia | LC | passage (2001) | 30 birds | B1i, B2, C6 |
| Eurasian Spoonbill Platalea leucorodia | LC | winter (2001) | 30 birds | B1i, B2, C6 |
| Common Little Bittern Ixobrychus minutus | LC | breeding (2001) | 4–6 pairs | C6 |
| Purple Heron Ardea purpurea | LC | breeding (2001) | 3–7 pairs | C6 |
| Black-winged Stilt Himantopus himantopus | LC | resident (2001) | 300 pairs | 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 | - | |
| Pressure (threats to the trigger species and/or their habitats) | ||||
|---|---|---|---|---|
| Threat | Timing | Scope | Severity | Result |
| Residential and commercial development | likely in short term (<4 years) | whole of population/area (>90%) | rapid decline (>30% over 3 generations) | very high |
| Human intrusions and disturbance | happening now | most of population/area (50–90%) | slow decline (1–10% over 3 generations) | high |
| Pollution | happening now | most of population/area (50–90%) | slow decline (1–10% over 3 generations) | high |
| Response (conservation actions taken for the trigger species and/or their habitats) | |||
|---|---|---|---|
| Designation | Planning | Action | Result |
| Little/none of area covered (<10%) | A management plan exists, but it is out of date or not comprehensive | Some limited conservation initiatives are in place | not assessed |
| Habitat | % of IBA | Habitat detail |
|---|---|---|
| Marine Coastal/Supratidal | major (>10) | |
| Artificial/Terrestrial | - | Perennial crops, orchards and groves; Other urban and industrial areas; Arable land |
| Marine Intertidal | - |
| Land use | % of IBA |
|---|---|
| agriculture | - |
| fisheries/aquaculture | - |
| tourism/recreation | - |
| urban/industrial/transport | - |
Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Pera marsh (Portugal). Downloaded from
https://datazone.birdlife.org/site/factsheet/pera-marsh-iba-portugal on 23/12/2024.