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Location Spain, Aragón,Navarra
Central coordinates 1o 34.00' West  42o 24.00' North
IBA criteria C6
Area 260 ha
Altitude 350 - 370m
Year of IBA assessment 2000


Site description Small endorreic lagoons, now used for irrigation, with water-fringe vegetation.

Key Biodiversity This is an important site for breeding herons and wetland raptors and passage site for Grus grus and wildfowl.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Eurasian Bittern Botaurus stellaris resident  1996  1-2 breeding pairs  good  C6  Least Concern 
Purple Heron Ardea purpurea breeding  1996  18-22 breeding pairs  good  C6  Least Concern 
Western Marsh-harrier Circus aeruginosus resident  1992  35-40 breeding pairs  good  C6  Least Concern 

IBA Monitoring

2008 high favourable low
Medium - based upon reliable but incomplete / partially representative data

Climate change and severe weather drought happening now whole area/population (>90%) no or imperceptible deterioration low
Pollution agricultural & forestry effluents - nutrient loads happening now whole area/population (>90%) slow but significant deterioration high

Wetlands (inland)   0 0 good (> 90%) good (> 90%) favourable

Anser anser Greylag Goose 200 200 breeding pairs 100 not assessed

Whole area of site (>90%) covered by appropriate conservation designation  No management planning has taken place  Substantive conservation measures are being implemented but these are not comprehensive and are limited by resources and capacity  low 

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Laguna de Pitillas Nature Reserve 216 protected area contained by site 216  


IUCN habitat Habitat detail Extent (% of site)
Wetlands (inland) Standing brackish and salt water; Standing freshwater; Water fringe vegetation  100%

Land use

Land-use Extent (% of site)
water management 100%

Protection status National High International High21 ha of IBA covered by Natural Area (Laguna de Dos Reinos, 21 ha). 216 ha of IBA covered by Natural Reserve (Laguna de Pitillas, 216 ha). 21 ha of IBA covered by Special Protection Area (Laguna de Dos Reinos, 21 ha). 216 ha of IBA covered by Special Protection Area (Laguna de Pitillas, 216 ha).

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Recommended citation  BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Pitillas and Dos Reinos lagoons. Downloaded from on 23/10/2016

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