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Location Portugal, Norte
Central coordinates 7o 49.00' West  41o 21.00' North
IBA criteria C6
Area 58,788 ha
Altitude 50 - 1,416m
Year of IBA assessment 2002

Sociedade Portuguesa para o Estudo das Aves

Site description Mountains with NE-SW orientation and maximum altitudes of 1330 meters (Alvão) and 1416 m. (Marão). The site is longitudinally bounded by the valleys of the rivers Tâmega (at West) and Corgo (at East). The site reaches its lower altitude at river Corgo's mouth. This site holds a large diversity of geomorphologic situations and natural habitats, namely atlantic humid meridional heaths and mountanious grass-lands. Groves, oak forests of Quercus robur and Q. pyrenaica, water fringe forests of Salix alba and Populus alba and cork oak forests are also found.

Key Biodiversity Alvão and Marão mountains re important due to the presence of an isolated breeding pair of Aquila chrysaetos. The site also holds a resident colony of Pyrrhocorax pyrrhocorax that during winter increases its number with feeding individuals. These mountains have ornithological importance for holding interesting raptors and transaharian migratory passerines. There are 146 bird species refered for this area.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Falco peregrinus resident  2001  4-6 breeding pairs  good  C6  Not Recognised 
Circus cyaneus breeding  1998  rare  C6  Not Recognised 
Montagu's Harrier Circus pygargus breeding  1996  common  C6  Least Concern 
Golden Eagle Aquila chrysaetos resident  2002  1 breeding pairs  good  C6  Least Concern 
Eurasian Eagle-owl Bubo bubo resident  2001  3-6 breeding pairs  good  C6  Least Concern 
Red-billed Chough Pyrrhocorax pyrrhocorax resident  2001  6-15 individuals  good  C6  Least Concern 
Tawny Pipit Anthus campestris breeding  2001  common  C6  Least Concern 

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

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Alvão Nature Park 7,203 protected area contained by site 7,220  


IUCN habitat Habitat detail Extent (% of site)
Forest Broadleaved deciduous woodland; Mixed woodland  -
Shrubland Sclerophyllous scrub, garrigue and maquis  -
Grassland Humid grasslands  -
Wetlands (inland) Rivers and streams; Standing freshwater; Water fringe vegetation  -
Rocky areas Inland cliffs  -
Artificial - terrestrial Arable land; Forestry plantations; Other urban and industrial areas; Perennial crops, orchards and groves  -
Introduced vegetation   -

Land use

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

Protection status National: Nature Park Alvão,7220ha cointaned by IBA.SIC proposal Alvão/Marão, 58788 ha overlaps by IBAInternational: SICs Proposal Alvão/Marão

References Paes de Faria(1988,1995,1998,2001a,2001b)Travassos& Paes de Faria(1995,1999)Àlvares et al.(1998), Travassos(1998),Palma et al.(1999)Travassos et al. (2001)Rosa et al. (2001)

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Recommended citation  BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Serras do Alvão e Marão. Downloaded from on 25/10/2016

To provide new information to update this factsheet or to correct any errors, please email BirdLife