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Location Portugal, Algarve
Central coordinates 8o 20.00' West  37o 6.00' North
IBA criteria B1i, B2, C6
Area 149 ha
Altitude 2 - 16m
Year of IBA assessment 2002

Sociedade Portuguesa para o Estudo das Aves

Site description Fenny humid zone formed by a main water area in the confluence of two rivers, and a large marshy zone extended to North-West. The lagoon is isolated from ocean by a continuous sandy barrier, that only opens when high precipitations or human intervention. Western and Northern surrounding areas are mainly agricultural, beeing constituted by crop-lands, traditional dryer orchards (figs, almonds and olive trees), and small vineyards. At the East, lagoon is limited by a golf course that holds artificial lakes with marshy vegetation. And at the South we find the robust sand-dune string that extends 4 kilometres to the West. The prominent vegetation is holphyte, formed by extensive patches of rush and reeds beds.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Ferruginous Duck Aythya nyroca breeding  2002  1-2 breeding pairs  good  B2, C6  Near Threatened 
Eurasian Spoonbill Platalea leucorodia passage  2001  30 individuals  good  B1i, B2, C6  Least Concern 
Eurasian Spoonbill Platalea leucorodia winter  2001  30 individuals  good  B1i, B2, C6  Least Concern 
Ixobrychus minutus breeding  2001  4-6 breeding pairs  medium  C6  Not Recognised 
Purple Heron Ardea purpurea breeding  2001  3-7 breeding pairs  good  C6  Least Concern 
Purple Swamphen Porphyrio porphyrio resident  2000  6-10 breeding pairs  medium  C6  Least Concern 
Himantopus himantopus resident  2001  300 breeding pairs  medium  C6  Not Recognised 


IUCN habitat Habitat detail Extent (% of site)
Wetlands (inland) Water fringe vegetation  major
Artificial - terrestrial Arable land; Other urban and industrial areas; Perennial crops, orchards and groves  -
Coastline Sand dunes & beaches  -

Land use

Land-use Extent (% of site)
agriculture -
fisheries/aquaculture -
tourism/recreation -
urban/industrial/transport -

Protection status National noneInternational none

References Kelsh (1987), Bolton (1988), Ministro (2001), Ministro & Fernandes (2002)

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Recommended citation  BirdLife International (2014) Important Bird Areas factsheet: Pera marsh. Downloaded from on 21/10/2014

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