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Location Portugal, Algarve
Central coordinates 7o 26.00' West  37o 12.00' North
IBA criteria A4i, B1i, B2, C2, C6
Area 2,147 ha
Altitude 0 - 42m
Year of IBA assessment 2002

Sociedade Portuguesa para o Estudo das Aves



Site description The Portuguese side of the Guadiana estuary, at the country's south-east corner. There is an extensive area of saltpans and of claimed land (used for cattle and sheep-grazing) that was formerly saltmarsh.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Greater Flamingo Phoenicopterus roseus winter  2000  350-1,180 individuals  good  A4i, B1i, C2  Least Concern 
White Stork Ciconia ciconia resident  1996  100-150 individuals  medium  B2, C6  Least Concern 
Eurasian Spoonbill Platalea leucorodia winter  1996  200-500 individuals  medium  A4i, B1i, C2  Least Concern 
Little Bustard Tetrax tetrax breeding  2002  10-20 individuals  good  C6  Near Threatened 
Little Bustard Tetrax tetrax winter  2002  90-100 individuals  good  C6  Near Threatened 
Eurasian Thick-knee Burhinus oedicnemus breeding  2002  common [units unknown]  C6  Least Concern 
Eurasian Thick-knee Burhinus oedicnemus winter  2002  200-300 individuals  good  C6  Least Concern 
Black-winged Stilt Himantopus himantopus resident  2001  200 breeding pairs  good  A4i, B1i, C2, C6  Least Concern 
Pied Avocet Recurvirostra avosetta winter  1996  400-560 individuals  good  B2, C6  Least Concern 
Pied Avocet Recurvirostra avosetta breeding  2001  121-198 breeding pairs  good  B2, C6  Least Concern 
Collared Pratincole Glareola pratincola breeding  2000  rare [units unknown]  C6  Least Concern 
Little Tern Sterna albifrons breeding  2001  50-90 breeding pairs  good  B2, C6  Least Concern 
Calandra Lark Melanocorypha calandra breeding  1996  rare [units unknown]  C6  Least Concern 
Thekla Lark Galerida theklae resident  2001  frequent [units unknown]  C6  Least Concern 

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Ria Formosa/Castro Marim - PTCON0013 Habitats Directive 17,520 protected area contains site 2,147  
Sapais de Castro Marim Wetlands of International Importance (Ramsar) 2,235 protected area overlaps with site 2,235  
Sapais de Castro Marim - PTZPE0018 Birds Directive 2,147 protected area overlaps with site 2,038  
Sapal de Castro Marim e Vila Real de Santo António Nature Reserve 2,308 protected area overlaps with site 1,876  

Habitats

IUCN habitat Habitat detail Extent (% of site)
Wetlands (inland) Standing brackish and salt water  -
Artificial - terrestrial Arable land; Forestry plantations; Perennial crops, orchards and groves  -
Coastline Mud flats & sand flats; Salt marshes; Tidal rivers & enclosed tidal waters  -

Land use

Land-use Extent (% of site)
water management -
fisheries/aquaculture -
nature conservation and research -
tourism/recreation -
agriculture -

Protection status National Nature Reserve Sapal de Castro Marim e de Vila Real de Santo António; Special Protection Area Sapal de Castro Marim; SCI proposal Ria Formosa/Castro MarimInternational Special Protection Area Sapal de Castro Marim; Ramsar Wetland Site (7PT010)

References Farinha & Trinidade (1994), Mendes (1995), Costa & Rufino (1997), Leitão & Farinha (1998), Dias (1999), Costa et al. (2000), Leitão (2002a, 2002b).

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Recommended citation  BirdLife International (2014) Important Bird Areas factsheet: Castro Marim. Downloaded from http://www.birdlife.org on 17/04/2014

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