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Location Spain, Castilla y León
Central coordinates 3o 25.00' West  42o 0.00' North
IBA criteria A4ii, B1iii, B2, C2, C6
Area 26,000 ha
Altitude 860 - 1,455m
Year of IBA assessment 2000

SEO/BirdLife



Site description A group of limestone cliffs carved by the Rivers Arlanza and Mataviejas. The slopes and plateaus are covered by Juniperus and Quercus woodland, scrub and arable agriculture in the valleys.

Key Biodiversity This is an important site for cliff-nesting raptors.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Egyptian Vulture Neophron percnopterus breeding  1992  17 breeding pairs  good  B2  Endangered 
Griffon Vulture Gyps fulvus resident  1992  219 breeding pairs  good  A4ii, B1iii, B2, C2, C6  Least Concern 

IBA Monitoring

2007 high not assessed low
unset
Poor - based on little, or potentially unreliable/unrepresentative, data

Agricultural expansion and intensification livestock farming and ranching (includes forest grazing) - agro-industry grazing, ranching or farmin happening now some of area/population (10-49%) slow but significant deterioration medium
Agricultural expansion and intensification wood and pulp plantations (includes afforestation) - small-holder plantations happening now some of area/population (10-49%) slow but significant deterioration medium
Human intrusions and disturbance recreational activities happening now majority/most of area/population (50-90%) no or imperceptible deterioration low
Over-exploitation, persecution and control of species direct mortality of trigger species - hunting and trapping happening now majority/most of area/population (50-90%) slow but significant deterioration high
Pollution agricultural and forestry effluents and practices happening now small area/few individuals (<10%) moderate to rapid deterioration low
Pollution domestic and urban waste water happening now some of area/population (10-49%) slow but significant deterioration medium
Pollution garbage and solid waste happening now small area/few individuals (<10%) slow but significant deterioration low
Residential and commercial development tourism and recreation areas happening now majority/most of area/population (50-90%) no or imperceptible deterioration low
Transportation and service corridors roads and railroads happening now some of area/population (10-49%) slow but significant deterioration medium
Transportation and service corridors utility & service lines happening now some of area/population (10-49%) moderate to rapid deterioration high

Aquila fasciata Bonelli's Eagle 1 0 breeding pairs 0 very unfavourable

Whole area of site (>90%) covered by appropriate conservation designation  Not assessed  Not assessed  low 

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
RIBERAS DEL RÍO ARLANZA Y AFLUENTES - ES4120071 Habitats Directive 998 protected area overlaps with site 68  
SABINARES DEL ARLANZA - ES4120031 Birds Directive 37,404 protected area overlaps with site 15,923  
SABINARES DEL ARLANZA - ES4120091 Habitats Directive 37,639 protected area overlaps with site 15,713  

Habitats

IUCN habitat Habitat detail Extent (% of site)
Forest Alluvial and very wet forest; Broadleaved deciduous woodland; Broadleaved evergreen woodland  30%
Shrubland Sclerophyllous scrub, garrigue and maquis; Scrub  20%
Caves and subterranean habitats (non-aquatic) Caves  -
Artificial - terrestrial Arable land; Forestry plantations; Other urban and industrial areas; Ruderal land  35%
Rocky areas Inland cliffs; Scree & boulders  -

Land use

Land-use Extent (% of site)
agriculture 35%
forestry 25%
hunting 65%

Protection status National None International None

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Recommended citation  BirdLife International (2014) Important Bird Areas factsheet: Arlanza Valley-Peñas de Cervera. Downloaded from http://www.birdlife.org on 27/11/2014

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