• Summary
• Text account
• Data table and detailed info
• Map
• Reference and further resources

The site was identified as important in 2007 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
Manx Shearwater Puffinus puffinus	LC	breeding	2001	16,183 breeding pairs	A4ii, B1ii, B2, C3
Peregrine Falcon Falco peregrinus	LC	resident	1995	12 breeding pairs	C6
Red-billed Chough Pyrrhocorax pyrrhocorax	LC	resident	1999-2004	18 breeding pairs	B2, C6

1. The current IUCN Red List category. The category at the time of the IBA criteria assessment (2007) may differ.

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

State (condition of the trigger species' populations)
Species	Reference	Actual	Units	% remaining	Result
Manx Shearwater Puffinus puffinus	4,300	16,183	breeding pairs	100	favourable
Red-billed Chough Pyrrhocorax pyrrhocorax	19	18	breeding pairs	95	favourable

Pressure (threats to the trigger species and/or their habitats)
Threat	Timing	Scope	Severity	Result
Agricultural expansion and intensification	likely in short term (within 4 years)	some of area/population (10-49%)	moderate to rapid deterioration	medium
Human intrusions and disturbance	likely in short term (within 4 years)	some of area/population (10-49%)	moderate to rapid deterioration	medium
Energy production and mining	likely in long term (beyond 4 years)	some of area/population (10-49%)	moderate to rapid 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90%) covered by appropriate conservation designation	A management plan exists but it is out of date or not comprehensive	Some limited conservation initiatives are in place	medium

Year	Protected Area	Designation	% overlap with IBA
1951	Porthor	Nature Reserve	4
1954	Uwchmynydd	Nature Reserve	27
1957	Llyn	Area of Outstanding Natural Beauty	89
1957	Glannau Aberdaron	Site of Special Scientific Interest (UK)	71
1957	Ynys Enlli: Bardsey Island	Site of Special Scientific Interest (UK)	40
1957	Lleyn (Llyn)	Area of Outstanding Natural Beauty	-
1974	Llyn Coast	Heritage Coast	64
1980	Ynysoedd y Gwylanod: Gwylan Islands	Site of Special Scientific Interest (UK)	<1
1986	Ynys Enlli (bardsey)	National Nature Reserve	35
1990	Cwrt, Henfaes and Porth Simdde	Nature Reserve	<1
1992	Glannau Aberdaron ac Ynys Enlli/ Aberdaron Coast and Bardsey Island	Special Protection Area (Birds Directive)	100
1996	Pen Llŷn a`r Sarnau/ Lleyn Peninsula and the Sarnau	Site of Community Importance (Habitats Directive)	13
2000	Clogwyni Pen Llŷn/ Seacliffs of Lleyn	Site of Community Importance (Habitats Directive)	34
2005	Pen Llyn a`r Sarnau / Lleyn Peninsula and the Sarnau	Marine Protected Area (OSPAR)	13
2015	Glannau Aberdaron and Ynys Enlli / Aberdaron Coast and Bardsey Island	Marine Protected Area (OSPAR)	14
2017	West Wales Marine / Gorllewin Cymru Forol	Site of Community Importance (Habitats Directive)	11

Habitat1	Habitat detail	% of IBA
Grassland		-
Marine Coastal/Supratidal		-
Shrubland	Heathland	-
Wetlands (inland)	Fens, transition mires and springs	-

1. IUCN Habitat classification.

Land use	% of IBA
agriculture	-
nature conservation and research	-
tourism/recreation	-

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Glannau Aberdaron and Ynys Enlli (United Kingdom). Downloaded from https://datazone.birdlife.org/site/factsheet/glannau-aberdaron-and-ynys-enlli-iba-united-kingdom on 22/11/2024.