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

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
Red-billed Chough Pyrrhocorax pyrrhocorax	LC	resident	2000-2004	21 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

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%)	slow but significant deterioration	medium
Energy production and mining	renewable energy	likely in short term (within 4 years)	small area/few individuals (<10%)	moderate to rapid deterioration	low
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
Pyrrhocorax pyrrhocorax	Red-billed Chough	9	21	breeding pairs	100	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90%) covered by appropriate conservation designation	A management plan exists but it is out of date or not comprehensive	Some limited conservation initiatives are in place	medium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

Protected Area	Designation	Area (ha)	Relationship with IBA	Overlap with IBA (ha)
Ynys Mon / Anglesey	Area of Outstanding Natural Beauty	22,010	protected area overlaps with site	608
Tre Wilmot	Site of Special Scientific Interest (UK)	63	protected area overlaps with site	63
South Stack Cliffs	RSPB Reserve	340	protected area overlaps with site	298
South Stack Cliffs	Nature Reserve	340	protected area overlaps with site	0
Rhoscolyn Reedbed	Site of Special Scientific Interest (UK)	15	protected area is adjacent to site	0
Porth Dafarch	Nature Reserve	8	protected area overlaps with site	0
North Anglesey Marine / Gogledd Môn Forol	Site of Community Importance (Habitats Directive)	324,949	protected area overlaps with site	0
Holyhead Mountain	Heritage Coast	3	protected area is adjacent to site	102
Glannau Ynys Gybi/ Holy Island Coast	Site of Community Importance (Habitats Directive)	460	protected area contained by site	0
Glannau Ynys Gybi/ Holy Island Coast	Special Protection Area (Birds Directive)	604	is identical to site	608
Glannau Ynys Gybi: Holy Island Coast	Site of Special Scientific Interest (UK)	401	protected area overlaps with site	399
Glannau Rhoscolyn	Site of Special Scientific Interest (UK)	145	protected area overlaps with site	54
Anglesey Terns / Morwenoliaid Ynys Môn	Special Protection Area (Birds Directive)	101,931	protected area is adjacent to site	0

IUCN Habitat	Habitat detail	Extent (% of site)
Shrubland	Heathland	-
Coastline	Sea cliffs and rocky shores, Rock stacks and islets, Scree and boulders	-
Marine Coastal/Supratidal		-

For further information about the habitat classification please click here.

Land-use	Extent (% of site)
nature conservation and research	-
tourism/recreation	-

For further information about the land use classification please click here.

---

Recommended citation
BirdLife International (2023) Important Bird Areas factsheet: Glannau Ynys Gybi/Holy Island Coast. Downloaded from http://www.birdlife.org on 07/02/2023.