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Location Spain, Castilla-La Mancha
Central coordinates 3o 10.00' West  39o 30.00' North
IBA criteria A1, A4i, B1i, B1iii, B2, C1, C2, C3, C6
Area 58,500 ha
Altitude 700 - 750m
Year of IBA assessment 2000


Site description An area of arable cultivation with several natural and artificial lagoons.

Key Biodiversity The site is important for steppic species and wildfowl. Species of global conservation concern that do not meet IBA criteria: Tetrax tetrax (22 resident pairs) and Otis tarda (14-27 resident pairs).

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Gadwall Mareca strepera breeding  1997  45 breeding pairs  good  B2  Least Concern 
Red-crested Pochard Netta rufina winter  1997  4,638 individuals  good  A4i, B1i, C3  Least Concern 
Red-crested Pochard Netta rufina resident  1996  338 breeding pairs  good  A4i, B1i, B2, C3  Least Concern 
White-headed Duck Oxyura leucocephala resident  1996  20 breeding pairs  good  A1, B1i, B2, C1, C2, C6  Endangered 
Purple Heron Ardea purpurea breeding  1996  20-30 breeding pairs  good  C6  Least Concern 
Lesser Kestrel Falco naumanni breeding  1996  100 breeding pairs  medium  A1, B1iii, B2, C1, C2, C6  Least Concern 
Western Marsh-harrier Circus aeruginosus resident  1996  52 breeding pairs  good  C6  Least Concern 
Himantopus himantopus breeding  1996  201-210 breeding pairs  good  B1i, C2, C6  Not Recognised 
Pied Avocet Recurvirostra avosetta breeding  1996  65 breeding pairs  good  C6  Least Concern 
Collared Pratincole Glareola pratincola breeding  1996  47 breeding pairs  good  B1i, B2, C2, C6  Least Concern 
Sterna nilotica breeding  1996  182 breeding pairs  good  A4i, B1i, B2, C2, C6  Not Recognised 

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Lagunas de Alcázar de San Juan Wetlands of International Importance (Ramsar) 240 protected area contained by site 160  


IUCN habitat Habitat detail Extent (% of site)
Wetlands (inland) Rivers and streams; Standing brackish and salt water; Standing freshwater  26%
Artificial - terrestrial Arable land; Perennial crops, orchards and groves  85%

Land use

Land-use Extent (% of site)
agriculture 85%
hunting -

Protection status National None International Partial250 ha of IBA covered by Ramsar Site (Lagunas de Alcázar de San Juan, 250 ha). 8,800 ha of IBA covered by Special Protection Area (Humedales de la Mancha, 11,520 ha).

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Recommended citation  BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Alcázar de San Juan-Quero endorreic lagoons. Downloaded from on 21/10/2016

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