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Location Portugal, Alentejo
Central coordinates 8o 1.00' West  39o 6.00' North
IBA criteria B1iii, B2, C2, C6
Area 48,606 ha
Altitude 100 - 200m
Year of IBA assessment 2002

Sociedade Portuguesa para o Estudo das Aves

Site description An extensive evergreen woodland of cork oak (Q.suber) that is managed for explotation of cork and shrubland is used for agriculture and shepherding.Also there are some woodland of Q. ilex and some irrigative and dry cultivation.The area contains a plateaus where River Seda forms a valley. This site holds Albufeira (lagoon) of Montargil, Albufeira of Maranhão, little dams and the Rivers Seda, Sor, Almadaf and Raia

Key Biodiversity Specially important for the number of raptors. There are 11 species of raptors that breeding in this site, the global density is about 60-80 pairs/100Km2. It is possible to watch, during all the year, individuals of Hieraaetus fasciatus and Pandion haliaetus(1-2),Circus cyaneus (2-3), Circus aeruginosus (1-2) during the winter; ocasionally Aquila chrysaetos.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Black Stork Ciconia nigra breeding  2001  1-2 breeding pairs  medium  C6  Least Concern 
Ixobrychus minutus breeding  1999  frequent  C6  Not Recognised 
Black-winged Kite Elanus caeruleus resident  2001  6-8 breeding pairs  medium  B2, C6  Least Concern 
Booted Eagle Hieraaetus pennatus breeding  2001  36-40 breeding pairs  good  B1iii, B2, C2, C6  Least Concern 
European Honey-buzzard Pernis apivorus breeding  2001  7-10 breeding pairs  medium  C6  Least Concern 
Short-toed Snake-eagle Circaetus gallicus breeding  2001  8-10 breeding pairs  good  B2, C6  Least Concern 
Milvus migrans breeding  2001  8-10 breeding pairs  medium  C6  Not Recognised 

IBA Monitoring

2005 low not assessed not assessed
Good - based on reliable and complete / representative data

Transportation and service corridors utility & service lines happening now small area/few individuals (<10%) very rapid to severe deterioration low


IUCN habitat Habitat detail Extent (% of site)
Forest Broadleaved evergreen woodland; Treeline ecotone  75%
Artificial - terrestrial Arable land; Forestry plantations; Perennial crops, orchards and groves  25%
Shrubland Sclerophyllous scrub, garrigue and maquis  -
Wetlands (inland) Rivers and streams; Standing freshwater; Water fringe vegetation  -

Land use

Land-use Extent (% of site)
agriculture 20%
forestry 80%
hunting -
nature conservation and research -
tourism/recreation -
urban/industrial/transport -
water management -
fisheries/aquaculture -

Protection status National: SIC proposal Cabeção (48606 ha overlaps with IBA)International: SIC Candidature Cabeçâo

References Onofre & Palma (1986)Onofre (1996)Cruz et al.(1998)Onofre et al.(1999)Palma et al.(1999)

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Recommended citation  BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Cabeção. Downloaded from on 29/10/2016

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