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The site was identified as important in 2011 because it was regularly supporting significant populations of the species listed below, meeting ('triggering') IBA criteria.

Populations meeting IBA criteria ('trigger species') at the site:

Species	Red List1	Season	Year(s)	Size	IBA criteria
Egyptian Vulture Neophron percnopterus	EN	breeding	2008	min 12 breeding pairs	A1, B2, C1, C2
Griffon Vulture Gyps fulvus	LC	resident	2008	min 575 breeding pairs	A4ii, B1iii, C2, C6

1. The current IUCN Red List category. The category at the time of the IBA criteria assessment (2011) may differ.

Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2011. The most recent assessment (2007) is shown below.

State (condition of the trigger species' populations)
Species	Reference	Actual	Units	% remaining	Result
Bonelli's Eagle Aquila fasciata	1	0	breeding pairs	0	very unfavourable

Pressure (threats to the trigger species and/or their habitats)
Threat	Timing	Scope	Severity	Result
Transportation and service corridors	happening now	some of area/population (10-49%)	moderate to rapid deterioration	high
Biological resource use	happening now	some of area/population (10-49%)	moderate to rapid deterioration	high
Natural system modifications	happening now	some of area/population (10-49%)	moderate to rapid deterioration	high
Invasive and other problematic species and genes	happening now	some of area/population (10-49%)	moderate to rapid deterioration	high
Pollution	happening now	small area/few individuals (<10%)	moderate to rapid deterioration	low
Agricultural expansion and intensification	happening now	small area/few individuals (<10%)	slow but significant deterioration	low
Residential and commercial development	happening now	majority/most of area/population (50-90%)	no or imperceptible deterioration	low
Human intrusions and disturbance	happening now	majority/most of area/population (50-90%)	no or imperceptible deterioration	low

Response (conservation actions taken for the trigger species and/or their habitats)
Protected areas	Management plan	Other action	Result
Whole area of site (>90%) covered by appropriate conservation designation	Not assessed	Not assessed	low

Year	Protected Area	Designation	% overlap with IBA
1998	Sabinares Del Arlanza	Site of Community Importance (Habitats Directive)	27
2000	Sabinares del Arlanza - ZEPA	Special Protection Area (Birds Directive)	27
2000	Riberas Del Río Arlanza y Afluentes	Site of Community Importance (Habitats Directive)	<1

Habitat1	Habitat detail	% of IBA
Artificial/Terrestrial	Arable land, Forestry plantations, Other urban and industrial areas, Ruderal land	35
Forest	Broadleaved deciduous woodland, Alluvial and very wet forest, Broadleaved evergreen woodland	30
Shrubland	Scrub, Sclerophyllous scrub, garrigue and maquis	20
Caves and Subterranean Habitats (non-aquatic)	Caves	-
Rocky areas (eg. inland cliffs, mountain peaks)	Scree & boulders, Inland cliffs	-

1. IUCN Habitat classification.

Land use	% of IBA
hunting	65
agriculture	35
forestry	25

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Arlanza Valley-Peñas de Cervera (Spain). Downloaded from https://datazone.birdlife.org/site/factsheet/arlanza-valley-peñas-de-cervera-iba-spain on 23/11/2024.