Database release:

For Special Protection Areas (SPA),
Proposed Sites for Community Importance (pSCI),
Sites of Community Importance (SCI) and
for Special Areas of Conservation (SAC)



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1.1 Type


1.2 Site code


1.3 Site name

Estuário do Tejo

1.4 First Compilation date


1.5 Update date


1.6 Respondent:

Name/Organisation:Instituto da Conservação da Natureza e das Florestas, I.P.

1.7 Site indication and designation / classification dates

Date site classified as SPA:1988-03
National legal reference of SPA designationDecreto-Lei nº 280/94 de 5 de Novembro alterado pelo Decreto-Lei nº 190/2002 de 5 de Setembro


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2.1 Site-centre location [decimal degrees]:


2.2 Area [ha]


2.3 Marine area [%]


2.4 Sitelength [km]:


2.5 Administrative region code and name

NUTS level 2 code Region Name

2.6 Biogeographical Region(s)

Mediterranean (100.00 %)


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3.1 Habitat types present on the site and assessment for them

Annex I Habitat types Site assessment
Code PF NP Cover [ha] Cave [number] Data quality A|B|C|D A|B|C
      RepresentativityRelative SurfaceConservationGlobal
1110  info      0.00   
1130  info      0.00   
1140  info      0.00   
1210  info      0.00   
1310  info      0.00   
1320  info      0.00   
1410  info      0.00   
1420  info      0.00   
1430  info      0.00   
2130  info      0.00   
2240  info      0.00   
2270  info      0.00   
3120  info      0.00   
3150  info      0.00   
3160  info      0.00   
3170  info      0.00   
3260  info      0.00   
3280  info      0.00   
4030  info      0.00   
6310  info      0.00   
6420  info      0.00   
91B0  info      0.00   
92A0  info      0.00   
9330  info      0.00   
  • PF: for the habitat types that can have a non-priority as well as a priority form (6210, 7130, 9430) enter "X" in the column PF to indicate the priority form.
  • NP: in case that a habitat type no longer exists in the site enter: x (optional)
  • Cover: decimal values can be entered
  • Caves: for habitat types 8310, 8330 (caves) enter the number of caves if estimated surface is not available.
  • Data quality: G = 'Good' (e.g. based on surveys); M = 'Moderate' (e.g. based on partial data with some extrapolation); P = 'Poor' (e.g. rough estimation)

3.2 Species referred to in Article 4 of Directive 2009/147/EC and listed in Annex II of Directive 92/43/EEC and site evaluation for them

Species Population in the site Site assessment
G Code Scientific Name S NP T Size Unit Cat. D.qual. A|B|C|D A|B|C
      MinMax  Pop.Con.Iso.Glo.
BA298Acrocephalus arundinaceus          DD       
BA297Acrocephalus scirpaceus          DD       
BA168Actitis hypoleucos    26  26       
BA247Alauda arvensis          DD       
BA229Alcedo atthis          DD       
F1102Alosa alosa          DD 
F1103Alosa fallax          DD 
BA054Anas acuta    1171  1171   
BA056Anas clypeata    6601  6601   
BA052Anas crecca    10250  10250   
BA050Anas penelope    4880  4880   
BA053Anas platyrhynchos    7648  7648   
BA051Anas strepera    149  149   
BA043Anser anser    2881  2881   
BA255Anthus campestris          DD       
BA257Anthus pratensis          DD       
BA259Anthus spinoletta          DD       
BA029Ardea purpurea    95  110   
BA024Ardeola ralloides         
BA169Arenaria interpres    327  327       
BA222Asio flammeus    14  40   
BA061Aythya fuligula      36       
M1308Barbastella barbastellus          DD         
BA021Botaurus stellaris           
BA133Burhinus oedicnemus    50     
BA243Calandrella brachydactyla          DD       
BA144Calidris alba    99  99       
BA149Calidris alpina    10820  10820   
BA466Calidris alpina schinzii          DD       
BA143Calidris canutus    974  974       
BA147Calidris ferruginea    336  336       
BA145Calidris minuta    72  72   
BA224Caprimulgus europaeus          DD       
BA225Caprimulgus ruficollis          DD       
BA365Carduelis spinus          DD       
BA138Charadrius alexandrinus    150  200   
BA138Charadrius alexandrinus    384  384   
BA137Charadrius hiaticula    536  536       
BA196Chlidonias hybridus          DD       
BA197Chlidonias niger          DD       
BA031Ciconia ciconia    260  290   
BA081Circus aeruginosus    21  21   
BA081Circus aeruginosus    29  32   
BA082Circus cyaneus    10         
BA084Circus pygargus     
BA208Columba palumbus    1000  10000         
BA113Coturnix coturnix          DD       
A1194Discoglossus galganoi          DD       
BA026Egretta garzetta    160  200   
BA026Egretta garzetta    287  287   
BA399Elanus caeruleus    10   
BA098Falco columbarius           
BA322Ficedula hypoleuca          DD       
BA153Gallinago gallinago    62  62       
BA660Gelochelidon nilotica nilotica          DD   
BA135Glareola pratincola    51  250   
BA130Haematopus ostralegus    70  70       
BA092Hieraaetus pennatus    10  30   
BA131Himantopus himantopus    355  355   
BA131Himantopus himantopus    300  350       
BA300Hippolais polyglotta          DD       
BA251Hirundo rustica          DD       
BA022Ixobrychus minutus          DD       
F1099Lampetra fluviatilis          DD 
BA341Lanius senator          DD       
BA183Larus fuscus          DD       
BA157Limosa lapponica    1278  1278   
BA156Limosa limosa    11683  11683   
BA246Lullula arborea          DD       
BA271Luscinia megarhynchos          DD       
BA272Luscinia svecica          DD 
M1355Lutra lutra          DD 
R1221Mauremys leprosa          DD 
BA242Melanocorypha calandra          DD       
BA069Mergus serrator         
M1338Microtus cabrerae          DD 
BA073Milvus migrans    11  50   
BA260Motacilla flava          DD     
BA319Muscicapa striata          DD       
BA058Netta rufina         
BA160Numenius arquata    437  437   
BA158Numenius phaeopus    105  105   
BA023Nycticorax nycticorax         
BA023Nycticorax nycticorax         
BA278Oenanthe hispanica          DD       
BA094Pandion haliaetus     
F1095Petromyzon marinus          DD 
BA017Phalacrocorax carbo    1766  1766   
BA151Philomachus pugnax    37  37       
BA151Philomachus pugnax    251  500   
BA035Phoenicopterus ruber    912  912   
BA315Phylloscopus collybita          DD       
BA316Phylloscopus trochilus          DD       
BA034Platalea leucorodia    80  90       
BA034Platalea leucorodia    663  663   
BA140Pluvialis apricaria    296  296   
BA141Pluvialis squatarola    4135  4135   
BA121Porzana pusilla    500  1000           
BA132Recurvirostra avosetta    6036  6036   
BA249Riparia riparia          DD       
BA195Sterna albifrons    110  130   
BA191Sterna sandvicensis    14  14    DD     
BA210Streptopelia turtur          DD       
BA351Sturnus vulgaris          DD       
BA310Sylvia borin          DD       
BA048Tadorna tadorna    155  155   
BA128Tetrax tetrax    140  150   
BA161Tringa erythropus    75  75       
BA164Tringa nebularia    130  130       
BA165Tringa ochropus         
BA162Tringa totanus    1705  1705   
BA286Turdus iliacus          DD       
BA285Turdus philomelos          DD       
BA232Upupa epops          DD       
BA142Vanellus vanellus    1529  1529   
  • Group: A = Amphibians, B = Birds, F = Fish, I = Invertebrates, M = Mammals, P = Plants, R = Reptiles
  • S: in case that the data on species are sensitive and therefore have to be blocked for any public access enter: yes
  • NP: in case that a species is no longer present in the site enter: x (optional)
  • Type: p = permanent, r = reproducing, c = concentration, w = wintering (for plant and non-migratory species use permanent)
  • Unit: i = individuals, p = pairs or other units according to the Standard list of population units and codes in accordance with Article 12 and 17 reporting (see reference portal)
  • Abundance categories (Cat.): C = common, R = rare, V = very rare, P = present - to fill if data are deficient (DD) or in addition to population size information
  • Data quality: G = 'Good' (e.g. based on surveys); M = 'Moderate' (e.g. based on partial data with some extrapolation); P = 'Poor' (e.g. rough estimation); VP = 'Very poor' (use this category only, if not even a rough estimation of the population size can be made, in this case the fields for population size can remain empty, but the field "Abundance categories" has to be filled in)

3.3 Other important species of flora and fauna (optional)


Population in the site


Group CODE Scientific Name S NP Size Unit Cat. Species Annex Other categories
     MinMax C|R|V|PIVVABCD
1327Eptesicus serotinus                 
1359Herpestes ichneumon               
1314Myotis daubentonii                 
1328Nyctalus lasiopterus               
1331Nyctalus leisleri               
2016Pipistrellus kuhlii                 
1309Pipistrellus pipistrellus                 
5009Pipistrellus pygmaeus                 
1329Plecotus austriacus                 
2428Podarcis hispanica                   
A048Tadorna tadorna               
A213Tyto alba                   
  • Group: A = Amphibians, B = Birds, F = Fish, Fu = Fungi, I = Invertebrates, L = Lichens, M = Mammals, P = Plants, R = Reptiles
  • CODE: for Birds, Annex IV and V species the code as provided in the reference portal should be used in addition to the scientific name
  • S: in case that the data on species are sensitive and therefore have to be blocked for any public access enter: yes
  • NP: in case that a species is no longer present in the site enter: x (optional)
  • Unit: i = individuals, p = pairs or other units according to the standard list of population units and codes in accordance with Article 12 and 17 reporting, (see reference portal)
  • Cat.: Abundance categories: C = common, R = rare, V = very rare, P = present
  • Motivation categories: IV, V: Annex Species (Habitats Directive), A: National Red List data; B: Endemics; C: International Conventions; D: other reasons


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4.1 General site character

Habitat class % Cover

Total Habitat Cover


Other Site Characteristics

Na planície aluvial existem vários tipos de habitats agrícolas de características muito particulares, como pastagens e prados de lezíria, alguns dos quais são periodicamente alagados, formando charcos temporários.

4.2 Quality and importance

Zona húmida de importância internacional para a invernada e passagem de aves dependentes de zonas húmidas.

4.3 Threats, pressures and activities with impacts on the site

The most important impacts and activities with high effect on the site

Negative Impacts
RankThreats and pressures [code]Pollution (optional) [code]inside/outside [i|o|b]
Positive Impacts
RankActivities, management [code]Pollution (optional) [code]inside/outside [i|o|b]

Rank: H = high, M = medium, L = low
Pollution: N = Nitrogen input, P = Phosphor/Phosphate input, A = Acid input/acidification,
T = toxic inorganic chemicals, O = toxic organic chemicals, X = Mixed pollutions
i = inside, o = outside, b = both

4.5 Documentation

Costa, L.T. & R. Rufino. 1994. Contagens de aves aquáticas em Portugal. Airo 5: 8-16. Costa, L.T. & R. Rufino. 1996. Contagens de aves aquáticas em Portugal - Janeiro 95. Airo 7 (1): 36-43. Farinha, J.C. & A. Trindade. 1994. Contribuição para o inventário e caracterização de Zonas Húmidas em Portugal Continental. MedWet/ICN, Lisboa. Rufino, R. & L.T. Costa. 1993. Contagens de aves aquáticas em Portugal. Airo 4: 57-67. Costa, L.T., M. Nunes, P. Geraldes, H. Costa 2003. Zonas Importantes para a Conservação das Aves em Portugal. SPEA. Farinha, J.C., L. Costa, A. Trindade, P.R. Araújo & E.P. Silva 2001. Zonas Húmidas Portuguesas de Importância Internacional. Instituto da Conservação da Natureza, Lisboa. Leitão, D., L.T. Costa 2001. First approach to the study of non-breeding abundance and habitat use by the Little Bustard (Tetrax tetrax) in the lower Tejo grasslands (South Portugal). Airo 11:37-43. Rosa G, D. Leitão, C. Mendes, F. Courinha, H. Costa, C. Pacheco & J. Pereira 2001b. Situação da Águia-sapeira Circus aeroginosus em Portugal: recenseamento da população invernante (1998/99). Airo 11: 23-27.


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5.1 Designation types at national and regional level:

Code Cover [%]

5.2 Relation of the described site with other sites:

Designated at national or regional level:

Type code Site name Type Cover [%]
PT07Reserva Natural do Estuário do Tejo+33.00

Designated at international level:

Type Site name Type Cover [%]
ramsarEstuário do Tejo+33.00


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6.1 Body(ies) responsible for the site management:

Organisation:Instituto da Conservação da Natureza e das Florestas, I.P.

6.2 Management Plan(s):

An actual management plan does exist:

Yes Name: Plano de Gestão da Zona de Protecção Especial do Estuário do Tejo
Link: http://

No, but in preparation

6.3 Conservation measures (optional)

Plano de Gestão aprovado pela Portaria n.º 670-A/99 de 30 de Junho



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