UK088
Glannau Aberdaron and Ynys Enlli


IBA Criteria

Year of most recent IBA criteria assessment: 2007

Populations of IBA trigger species
Species Current IUCN Red List Category Season Year(s) of estimate Population estimate IBA Criteria Triggered
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

Note: This table presents the IBA criteria triggered and the species that triggered then at the time of assessment, the current IUCN Red List category may vary from that which was in place at that time.

For more information about the IBA assessment process and criteria please click here


IBA Monitoring

Most recent IBA monitoring assessment
Year of assessment Threat score (pressure) Condition score (state) Action score (response)
2007 medium favourable medium
Was the whole site covered? Yes State assessed by Population
Accuracy of information good

Threats to the site (pressure)
Threat Level 1 Threat Level 2 Timing Scope Severity Result
Agricultural expansion and intensification livestock farming and ranching (includes forest grazing) - small-holder grazing, ranching or farming likely in short term (within 4 years) some of area/population (10-49%) moderate to rapid deterioration medium
Energy production and mining renewable energy likely in long term (beyond 4 years) some of area/population (10-49%) moderate to rapid deterioration medium
Human intrusions and disturbance recreational activities likely in short term (within 4 years) some of area/population (10-49%) moderate to rapid deterioration medium

Condition of key/trigger populations (state)
Scientific Common TargetPop ActualPop Units Remaining Result
Puffinus puffinus Manx Shearwater 4300 16183 breeding pairs 100 favourable
Pyrrhocorax pyrrhocorax Red-billed Chough 19 18 breeding pairs 95 favourable

Conservation actions taken at site (response)
Conservation Designation Management Planning Conservation 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90%) covered by appropriate conservation designation A management plan exists but it is out of date or not comprehensive Some limited conservation initiatives are in place medium
For more information about IBA monitoring please click here

IBA Protection

Protection status:

Protected Area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)
Ynysoedd y Gwylanod: Gwylan Islands Site of Special Scientific Interest (UK) 5 protected area overlaps with site 0
Ynys Enlli: Bardsey Island Site of Special Scientific Interest (UK) 206 protected area overlaps with site 201
Ynys Enlli (bardsey) National Nature Reserve 179 protected area overlaps with site 179
West Wales Marine / Gorllewin Cymru Forol Site of Community Importance (Habitats Directive) 737,614 protected area overlaps with site 0
Uwchmynydd Nature Reserve 162 protected area overlaps with site 0
Porthor Nature Reserve 30 protected area overlaps with site 0
Pen Llŷn a`r Sarnau/ Lleyn Peninsula and the Sarnau Site of Community Importance (Habitats Directive) 146,011 protected area overlaps with site 66
Pen Llyn a`r Sarnau / Lleyn Peninsula and the Sarnau Marine Protected Area (OSPAR) 144,100 protected area overlaps with site 0
Llyn Coast Heritage Coast 20 protected area overlaps with site 326
Llyn Area of Outstanding Natural Beauty 15,984 protected area overlaps with site 0
Lleyn (Llyn) Area of Outstanding Natural Beauty 0 protected area overlaps with site 488
Glannau Aberdaron and Ynys Enlli / Aberdaron Coast and Bardsey Island Marine Protected Area (OSPAR) 33,500 protected area overlaps with site 0
Glannau Aberdaron ac Ynys Enlli/ Aberdaron Coast and Bardsey Island Special Protection Area (Birds Directive) 33,942 protected area contains site 507
Glannau Aberdaron Site of Special Scientific Interest (UK) 304 protected area overlaps with site 358
Cwrt, Henfaes and Porth Simdde Nature Reserve 12 protected area overlaps with site 0
Clogwyni Pen Llŷn/ Seacliffs of Lleyn Site of Community Importance (Habitats Directive) 1,045 protected area overlaps with site 170

Habitats

IUCN Habitat Habitat detail Extent (% of site)
Shrubland Heathland -
Grassland -
Wetlands (inland) Fens, transition mires and springs -
Coastline Sea cliffs and rocky shores, Rock stacks and islets, Scree and boulders -
For further information about the habitat classification please click here.

Land use

Land-use Extent (% of site)
agriculture -
nature conservation and research -
tourism/recreation -
For further information about the land use classification please click here.


Recommended citation
BirdLife International (2020) Important Bird Areas factsheet: Glannau Aberdaron and Ynys Enlli. Downloaded from http://www.birdlife.org on 03/12/2020.