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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
Golden Eagle Aquila chrysaetos	LC	resident	2008	min 22 breeding pairs	B2, C2, C6
Bonelli's Eagle Aquila fasciata	LC	resident	2010	3 breeding pairs	C2, C6
Peregrine Falcon Falco peregrinus	LC	resident	2010	min 18 breeding pairs	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 (2008) is shown below.

State (condition of the trigger species' habitats)
Habitat	Quantity (% remaining)	Quality (% carrying capacity)	Result
Forest	moderate (70-90%)	moderate (70-90%)	unfavourable
Shrubland	good (> 90%)	good (> 90%)	favourable

Pressure (threats to the trigger species and/or their habitats)
Threat	Timing	Scope	Severity	Result
Biological resource use	happening now	whole area/population (>90%)	moderate to rapid deterioration	very high
Transportation and service corridors	likely in long term (beyond 4 years)	some of area/population (10-49%)	moderate to rapid deterioration	medium
Natural system modifications	likely in short term (within 4 years)	some of area/population (10-49%)	moderate to rapid deterioration	medium
Energy production and mining	happening now	small area/few individuals (<10%)	very rapid to severe deterioration	low

Response (conservation actions taken for the trigger species and/or their habitats)
Protected areas	Management plan	Other action	Result
Little/none of site covered (<10%)	No management planning has taken place	Very little or no conservation action taking place	negligible

Year	Protected Area	Designation	% overlap with IBA
1973	Sonsaz	National Game Reserve	37
1974	Hayedo de Montejo de la Sierra	Sitio Natural de Interés Nacional	<1
1974	Hayedo de Montejo de la Sierra	Nature Area of National Interest	<1
1974	Riofrío de Riaza	Nature Area of National Interest	<1
1978	Hayedo de Tejera Negra	Nature Park	1
1997	Sierra de Ayllón	Site of Community Importance (Habitats Directive)	50
1997	Sierra De Ayllón	Site of Community Importance (Habitats Directive)	4
1997	Sierra de Pela	Site of Community Importance (Habitats Directive)	1
1998	ZEPA Sierra de Ayllón	Special Protection Area (Birds Directive)	51
1999	Cuenca del río Lozoya y Sierra Norte	Site of Community Importance (Habitats Directive)	9
2003	Río Pelagallinas	Reserva Fluvial	<1
2005	Sierra del Rincón	UNESCO-MAB Biosphere Reserve	-
2011	Sierra Norte de Guadalajara	Parque Natural	63

Habitat1	Habitat detail	% of IBA
Artificial/Terrestrial	Arable land, Forestry plantations	50
Shrubland	Scrub	15
Forest	Broadleaved deciduous woodland	10
Grassland	Dry siliceous grassland, Humid grasslands	10
Rocky areas (eg. inland cliffs, mountain peaks)	Inland cliffs	10

1. IUCN Habitat classification.

Land use	% of IBA
hunting	100
forestry	60
agriculture	-

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Ayllón mountain range (Spain). Downloaded from https://datazone.birdlife.org/site/factsheet/ayllón-mountain-range-iba-spain on 23/11/2024.