Upper River Tejo

IBA Justification

The site was identified as important in 2002 because it was regularly supporting significant populations of the species listed below, meeting ('triggering') IBA criteria.

Populations meeting IBA criteria ('trigger species'):
Species Current IUCN Red List Category Season Year(s) Population estimate at site IBA criteria met
Pin-tailed Sandgrouse Pterocles alchata LC resident 2002 3-6 breeding pairs C6
Red-necked Nightjar Caprimulgus ruficollis NT breeding 2002 10-100 breeding pairs A3
Black Stork Ciconia nigra LC breeding 2002 18-19 breeding pairs A4i, B1i, B2, C6
Eurasian Eagle-owl Bubo bubo LC resident 2001 6-10 breeding pairs C6
Black-winged Kite Elanus caeruleus LC resident 2002 1-5 breeding pairs C6
Egyptian Vulture Neophron percnopterus EN breeding 2002 20-22 breeding pairs B2, C6
Short-toed Snake-eagle Circaetus gallicus LC breeding 2001 5-10 breeding pairs C6
Griffon Vulture Gyps fulvus LC resident 1999 110-112 breeding pairs B2, C6
Cinereous Vulture Aegypius monachus NT resident 2002 1 breeding pairs C6
Golden Eagle Aquila chrysaetos LC resident 2002 6-7 breeding pairs C6
Bonelli's Eagle Aquila fasciata LC resident 2002 5-7 breeding pairs B2, C6
Booted Eagle Hieraaetus pennatus LC breeding 2001 11-20 breeding pairs B2, C6
Red Kite Milvus milvus LC breeding 2001 1 breeding pairs C6
Black Kite Milvus migrans LC breeding 2001 6-10 breeding pairs C6
Calandra Lark Melanocorypha calandra LC resident 2002 common C6
Greater Short-toed Lark Calandrella brachydactyla LC resident 2002 frequent C6
Spectacled Warbler Curruca conspicillata LC breeding 2002 rare A3
Blue Rock-thrush Monticola solitarius LC resident 2002 80-200 breeding pairs B2
Black Wheatear Oenanthe leucura LC resident 2001 uncommon A3, B2, C6

The current IUCN Red List category may differ from that which was valid at the time of IBA criteria assessment (2002).

IBA Conservation

IBA conservation assessment
Year of assessment (most recent) State (condition) Pressure (threat) Response (action)
2005 not assessed low not assessed
Was the whole site assessed? State assessed by Accuracy of information
no unset good

Pressure (threats to the trigger species and/or their habitats)
Threat level 1 Threat level 2 Timing Scope Severity Result
Transportation and service corridors utility & service lines happening now small area/few individuals (<10%) very rapid to severe deterioration low

Response (conservation actions taken for the trigger species and/or their habitats)
Protected-area designation Management planning Other conservation action Result
Not assessed Not assessed Not assessed not assessed
For more information about IBA conservation status, please click here

IBA Protection

Protected area (PA) PA designation PA area (ha) Relationship of PA with IBA Overlap of PA with IBA (ha)
Tejo Internacional; Erges e Pônsul Special Protection Area (Birds Directive) 25,775 protected area overlaps with site 24,205
Tejo Internacional Natural Park 23,441 protected area overlaps with site 16,627
Tejo Internacional Parque Natural 26,491 protected area overlaps with site 0


Habitat (IUCN level 1) Habitat detail Extent (% of site)
Forest Broadleaved evergreen woodland -
Shrubland Sclerophyllous scrub, garrigue and maquis -
Wetlands (inland) Water fringe vegetation, Rivers and streams -
Rocky areas (eg. inland cliffs, mountain peaks) Scree & boulders, Inland cliffs -
Artificial/Terrestrial Arable land, Perennial crops, orchards and groves, Forestry plantations -
For more information about the IUCN Habitat classification, please click here.

Land use

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

Recommended citation
BirdLife International (2023) Important Bird Area factsheet: Upper River Tejo. Downloaded from on 30/11/2023.