Castro Marim

IBA Criteria

Year of most recent IBA criteria assessment: 2002

Populations of IBA trigger species
Species Current IUCN Red List Category Season Year(s) of estimate Population estimate IBA Criteria Triggered
Greater Flamingo Phoenicopterus roseus LC winter 2000 350-1,180 individuals A4i, B1i, C2
Little Bustard Tetrax tetrax NT breeding 2002 10-20 individuals C6
Little Bustard Tetrax tetrax NT winter 2002 90-100 individuals C6
White Stork Ciconia ciconia LC resident 1996 100-150 individuals B2, C6
Eurasian Spoonbill Platalea leucorodia LC winter 1996 200-500 individuals A4i, B1i, C2
Eurasian Thick-knee Burhinus oedicnemus LC breeding 2002 common C6
Eurasian Thick-knee Burhinus oedicnemus LC winter 2002 200-300 individuals C6
Pied Avocet Recurvirostra avosetta LC winter 1996 400-560 individuals B2, C6
Pied Avocet Recurvirostra avosetta LC breeding 2001 121-198 breeding pairs B2, C6
Black-winged Stilt Himantopus himantopus LC resident 2001 200 breeding pairs A4i, B1i, C2, C6
Collared Pratincole Glareola pratincola LC breeding 2000 rare C6
Little Tern Sternula albifrons LC breeding 2001 50-90 breeding pairs B2, C6
Calandra Lark Melanocorypha calandra LC breeding 1996 rare C6
Thekla's Lark Galerida theklae LC resident 2001 frequent C6

Note: This table presents the IBA criteria triggered and the species that triggered then at the time of assessment, the current IUCN Red List category may vary from that which was in place at that time.

For more information about the IBA assessment process and criteria please click here

IBA Monitoring

Most recent IBA monitoring assessment
Year of assessment Threat score (pressure) Condition score (state) Action score (response)
2005 low not assessed not assessed
Was the whole site covered? No State assessed by unset
Accuracy of information good

Threats to the site (pressure)
Threat Level 1 Threat Level 2 Timing Scope Severity Result
Transportation and service corridors utility & service lines happening now small area/few individuals (<10%) no or imperceptible deterioration low

Conservation actions taken at site (response)
Conservation Designation Management Planning Conservation Action Result
Not assessed Not assessed Not assessed not assessed
For more information about IBA monitoring please click here

IBA Protection

Protection status:

Protected Area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)
Sapal de Castro Marim e Vila Real de Santo António Reserva Natural 2,308 protected area overlaps with site 1,876
Sapais de Castro Marim Special Protection Area (Birds Directive) 2,146 protected area overlaps with site 2,038
Sapais de Castro Marim Ramsar Site, Wetland of International Importance 2,235 protected area overlaps with site 2,235
Ria Formosa / Castro Marim Site of Community Importance (Habitats Directive) 17,519 protected area overlaps with site 2,147


IUCN Habitat Habitat detail Extent (% of site)
Wetlands (inland) Standing brackish and salt water -
Artificial/Terrestrial Arable land, Perennial crops, orchards and groves, Forestry plantations -
Coastline Tidal rivers & enclosed tidal waters, Salt marshes, Mud flats & sand flats -
For further information about the habitat classification please click here.

Land use

Land-use Extent (% of site)
water management -
fisheries/aquaculture -
nature conservation and research -
tourism/recreation -
agriculture -
For further information about the land use classification please click here.

Recommended citation
BirdLife International (2020) Important Bird Areas factsheet: Castro Marim. Downloaded from on 15/08/2020.