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Location Spain, Castilla y León
Central coordinates 5o 47.00' West  41o 40.00' North
IBA criteria A1, C1
Area 22,300 ha
Altitude 686 - 750m
Year of IBA assessment 2000


Site description A long, narrow reservoir on the River Esla surrounded by cereal crops.

Key Biodiversity An important site for wintering wildfowl and resident steppic species. It is the only site for wintering Anser fabalis in the Iberian peninsula.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Great Bustard Otis tarda resident  1995  44 breeding pairs  good  A1, C1  Vulnerable 

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
LAGUNAS DE VILLAFÁFILA - ES0000004 Birds Directive 32,549 protected area is adjacent to site 0  
RIBERAS DEL RÍO ESLA Y AFLUENTES - ES4130079 Habitats Directive 1,792 protected area overlaps with site 150  


IUCN habitat Habitat detail Extent (% of site)
Forest Mixed woodland  10%
Shrubland Scrub  10%
Wetlands (inland) Standing freshwater  -
Artificial - terrestrial Arable land  80%

Land use

Land-use Extent (% of site)
agriculture 90%
water management -

Protection status National None International None

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Recommended citation  BirdLife International (2015) Important Bird Areas factsheet: Esla dam. Downloaded from on 06/05/2015

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