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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
European Shag Gulosus aristotelis	LC	resident	2004	1,024 breeding pairs	A4i, B1i, B3, C3
Common Murre Uria aalge	LC	resident	2009	present	C6
A4iii Species group - waterbirds	n/a	resident	1995	10,000-19,999 breeding pairs	A4iii, C4

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' populations)
Species	Reference	Actual	Units	% remaining	Result
European Shag Gulosus aristotelis	1,500	300	breeding pairs	20	very unfavourable
Larus cachinnans	20,000	20,000	breeding pairs	100	favourable

Pressure (threats to the trigger species and/or their habitats)
Threat	Timing	Scope	Severity	Result
Biological resource use	happening now	majority/most of area/population (50-90%)	very rapid to severe deterioration	very high
Natural system modifications	happening now	majority/most of area/population (50-90%)	very rapid to severe deterioration	very high
Invasive and other problematic species and genes	happening now	majority/most of area/population (50-90%)	very rapid to severe deterioration	very high
Transportation and service corridors	happening now	majority/most of area/population (50-90%)	moderate to rapid deterioration	high
Human intrusions and disturbance	happening now	some of area/population (10-49%)	moderate to rapid deterioration	high
Pollution	happening now	some of area/population (10-49%)	slow but significant deterioration	medium

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	No management plan exists but the management planning process has begun	Very little or no conservation action taking place	low

Year	Protected Area	Designation	% overlap with IBA
-	Islas Atlanticas	Marine Protected Area (OSPAR)	100
1980	Islas Cíes	Nature Park	100
1983	Illas Cíes	Special Protection Area (Birds Directive)	100
1997	Illas Cíes	Site of Community Importance (Habitats Directive)	96
2002	Marítimo-Terrestre de las Islas Atlánticas de Galicia	Parque Nacional	100
2004	Illas Cíes	Zona de Especial Protección de los Valores Naturales	96
2014	Espacio marino de las Rías Baixas de Galicia	Special Protection Area (Birds Directive)	4
2014	Espacio marino de las Rias Baixas de Galicia	Marine Protected Area (OSPAR)	4

Habitat1	Habitat detail	% of IBA
Shrubland	Scrub	40
Artificial/Terrestrial	Forestry plantations	25
Forest	Broadleaved deciduous woodland	10
Marine Coastal/Supratidal		major (>10)
Marine Intertidal		minor (<10)

1. IUCN Habitat classification.

Land use	% of IBA
nature conservation and research	100
fisheries/aquaculture	-
tourism/recreation	-

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