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Location Portugal, Centro
Central coordinates 7o 15.00' West  39o 43.00' North
IBA criteria A4i, B1i, B2, C6
Area 25,764 ha
Altitude 150 - 319m
Year of IBA assessment 2002

Sociedade Portuguesa para o Estudo das Aves

Site description Steep valleys with cliffs and Mediterranean scrub, located at the eastern border of central Portugal. The riverbed is much wider than it was 25 years ago, due to the construction of a large dam, and now allows the small-boat traffic of professional fishermen and recreational purposes.This site includes a great diversity of habitats that hold a wide mediterranean animal and vegetal diversity.

Key Biodiversity This area has a great value due to its wide diversity of species, withh special importance of cliff-nesting species and some steppic birds in plain areas. This site holds the greates population in Portugal of ciconia nigra and a significative proportion of large raptors. Also it is the only place in Portugal with breeding Aegypius monachus and still it is possible to found a Pterocles alchata.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Black Stork Ciconia nigra breeding  2002  18-19 breeding pairs  good  A4i, B1i, B2, C6  Least Concern 
Egyptian Vulture Neophron percnopterus breeding  2002  20-22 breeding pairs  good  B2, C6  Endangered 
Griffon Vulture Gyps fulvus resident  1999  110-112 breeding pairs  good  B2, C6  Least Concern 
Booted Eagle Hieraaetus pennatus breeding  2001  11-20 breeding pairs  medium  B2, C6  Least Concern 
Bonelli's Eagle Aquila fasciata resident  2002  5-7 breeding pairs  good  B2, C6  Least Concern 
Short-toed Snake-eagle Circaetus gallicus breeding  2001  5-10 breeding pairs  medium  C6  Least Concern 
Cinereous Vulture Aegypius monachus resident  2002  1 breeding pairs  good  C6  Near Threatened 
Red Kite Milvus milvus breeding  2001  1 breeding pairs  good  C6  Near Threatened 
Golden Eagle Aquila chrysaetos resident  2002  6-7 breeding pairs  good  C6  Least Concern 
Black-winged Kite Elanus caeruleus resident  2002  1-5 breeding pairs  poor  C6  Least Concern 
Milvus migrans breeding  2001  6-10 breeding pairs  medium  C6  Not Recognised 
Pin-tailed Sandgrouse Pterocles alchata resident  2002  3-6 breeding pairs  good  C6  Least Concern 
Eurasian Eagle-owl Bubo bubo resident  2001  6-10 breeding pairs  medium  C6  Least Concern 
Red-necked Nightjar Caprimulgus ruficollis breeding  2002  10-100 breeding pairs  medium  C6  Least Concern 
Calandra Lark Melanocorypha calandra resident  2002  common  C6  Least Concern 
Greater Short-toed Lark Calandrella brachydactyla resident  2002  frequent  C6  Least Concern 
Spectacled Warbler Sylvia conspicillata breeding  2002  rare  C6  Least Concern 
Black Wheatear Oenanthe leucura resident  2001  uncommon  B2, C6  Least Concern 
Blue Rock-thrush Monticola solitarius resident  2002  80-200 breeding pairs  medium  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)  
Tejo Internacional Natural Park 23,441 protected area overlaps with site 16,627  


IUCN habitat Habitat detail Extent (% of site)
Forest Broadleaved evergreen woodland  10%
Shrubland Sclerophyllous scrub, garrigue and maquis  55%
Wetlands (inland) Rivers and streams; Water fringe vegetation  15%
Rocky areas Inland cliffs; Scree & boulders  5%
Artificial - terrestrial Arable land; Forestry plantations; Perennial crops, orchards and groves  15%

Land use

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

Protection status National Natural park 23441ha, 16627 ha overlaps with IBA Special Protection Area Tejo Internacional, Erges e Ponsul,25764 ha overlaps with IBAInternational: Special Protection Area Tejo Internacional, Erges e Ponsul

References Pacheco & Monteiro (1999)Pacheco et al. (1999)Rosa et al.(1999)Rosa et al. (2001a,b)

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Recommended citation  BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Upper River Tejo. Downloaded from on 23/10/2016

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