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Location United Kingdom, Wales
Central coordinates 4o 30.81' West  53o 24.56' North
IBA criteria A4i, B1i, B2, C2, C6
Area 86 ha
Altitude 0 - 15m
Year of IBA assessment 2007

Royal Society for the Protection of Birds



Site description Ynys Feurig is a group of small, low-lying islands situated up to 1 km offshore, whilst the very exposed Skerries lie 3 km out to sea. The vegetation on most of the islands is sparse. At Cemlyn Bay, a shingle storm-beach forms a bar between a tidal lagoon surrounded by saltmarsh and the open shore. The IBA supports large tern colonies.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Sandwich Tern Thalasseus sandvicensis breeding  2000  450 breeding pairs  good  B2, C2, C6  Least Concern 
Sandwich Tern Thalasseus sandvicensis breeding  2006  1,273 breeding pairs  good  A4i, B1i, B2, C2, C6  Least Concern 
Roseate Tern Sterna dougallii breeding  2000  2 breeding pairs  good  C6  Least Concern 
Roseate Tern Sterna dougallii breeding  2006  2 breeding pairs  good  C6  Least Concern 
Common Tern Sterna hirundo breeding  2000  184 breeding pairs  good  C6  Least Concern 
Common Tern Sterna hirundo breeding  2006  429 breeding pairs  good  C6  Least Concern 
Arctic Tern Sterna paradisaea breeding  2000  1,705 breeding pairs  good  C2, C6  Least Concern 
Arctic Tern Sterna paradisaea breeding  2006  2,726 breeding pairs  good  C2, C6  Least Concern 

IBA Monitoring

2007 high favourable medium
Population
Good - based on reliable and complete / representative data

Energy production and mining renewable energy likely in short term (within 4 years) small area/few individuals (<10%) slow but significant deterioration low
Human intrusions and disturbance recreational activities happening now some of area/population (10-49%) moderate to rapid deterioration high
Invasive and other problematic species and genes problematic native species/diseases - unspecified species happening now some of area/population (10-49%) moderate to rapid deterioration high
Natural system modifications other ecosystem modifications happening now some of area/population (10-49%) moderate to rapid deterioration high
Over-exploitation, persecution and control of species fishing & harvesting aquatic resources - unintentional effects: large scale happening now whole area/population (>90%) slow but significant deterioration high

Thalasseus sandvicensis Sandwich Tern 650 1273 breeding pairs 100 favourable
Sterna dougallii Roseate Tern 10 2 breeding pairs 20 not assessed
Sterna hirundo Common Tern 125 429 breeding pairs 100 favourable
Sterna paradisaea Arctic Tern 1280 2726 breeding pairs 100 favourable

Whole area of site (>90%) covered by appropriate conservation designation  A management plan exists but it is out of date or not comprehensive  Substantive conservation measures are being implemented but these are not comprehensive and are limited by resources and capacity  medium 

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Anglesey Area of Outstanding Natural Beauty 21,999 protected area overlaps with site 59  
Bae Cemlyn (Cemlyn Bay) Habitats Directive 43 protected area contained by site 43  
Cemlyn Bay Site of Special Scientific Interest 44 protected area contained by site 44  
North Anglesey Coast Heritage Coast 0 protected area overlaps with site 24  
The Skerries RSPB Reserve 18 protected area contained by site 18  
The Skerries Site of Special Scientific Interest 17 protected area contained by site 17  
Ynys Feurig Site of Special Scientific Interest 25 protected area contained by site 25  
Ynys Feurig, Cemlyn Bay and The Skerries Birds Directive 86 is identical to site 86  

Habitats

IUCN habitat Habitat detail Extent (% of site)
Wetlands (inland) Coastal lagoons; Mud flats and sand flats; Salt marshes; Shingle or stony beaches; Standing brackish and salt water  -
Coastline Rock stacks and islets  -

Land use

Land-use Extent (% of site)
not utilised -

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Recommended citation  BirdLife International (2014) Important Bird Areas factsheet: Ynys Feurig, Cemlyn Bay and the Skerries. Downloaded from http://www.birdlife.org on 27/12/2014

To provide new information to update this factsheet or to correct any errors, please email BirdLife