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Location Spain, Extremadura
Central coordinates 6o 35.00' West  40o 10.00' North
IBA criteria A1, A4i, B1i, C1, C2, C3
Area 48,400 ha
Altitude 300 - 510m
Year of IBA assessment 2000


Site description This site comprises a reservoir surrounded by dehesa, non-irrigated arable land and grassland. There is a wooded island in the reservoir. The main human activities are livestock-grazing and hunting.

Key Biodiversity The site is important for post-breeding Ciconia nigra, breeding herons and wintering Grus grus.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Black Stork Ciconia nigra passage  1992  40-50 individuals  medium  B1i, C2  Least Concern 
Cattle Egret Bubulcus ibis breeding  1994  750 breeding pairs  good  A4i, B1i, C3  Least Concern 
Great Bustard Otis tarda winter  1995  40-50 individuals  good  A1, C1  Vulnerable 
Common Crane Grus grus winter  1995  853-1,620 individuals  medium  B1i, C2  Least Concern 

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
ARROYOS PATANA Y REGUEROS - ES4320061 Habitats Directive 951 protected area overlaps with site 692  
EMBALSE DE BORBOLLÓN - ES0000326 Birds Directive 946 protected area contained by site 946  
LAGUNA TEMPORAL DE VALDEHORNOS - ES4320067 Habitats Directive 13 protected area contained by site 13  
MINA DE LA AURORA - ES4320051 Habitats Directive 5 protected area contained by site 5  
MINA DE LA RIVERA DE ACEBO - ES4320052 Habitats Directive 5 protected area contained by site 5  
RIOS ARRAGO Y TRALGAS - ES4320072 Habitats Directive 761 protected area overlaps with site 407  
RIVERAS DE GATA Y ACEBO - ES4320076 Habitats Directive 1,089 protected area overlaps with site 419  
SIERRAS DE RISCO VIEJO - ES4320047 Habitats Directive 13,830 protected area is adjacent to site 0  


IUCN habitat Habitat detail Extent (% of site)
Forest Broadleaved evergreen woodland  26%
Shrubland Scrub  -
Grassland   26%
Wetlands (inland) Standing freshwater  -
Artificial - terrestrial Arable land; Highly improved re-seeded landscapes  -

Land use

Land-use Extent (% of site)
agriculture 26%
hunting 26%

Protection status National None International None

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Recommended citation  BirdLife International (2015) Important Bird Areas factsheet: Borbollón reservoir. Downloaded from on 04/05/2015

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