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Location United Kingdom, South West
Central coordinates 6o 20.75' West  49o 57.74' North
IBA criteria A4i, B1i, B2, B3, C2, C3, C6
Area 562 ha
Altitude 0 - 47m
Year of IBA assessment 2007

Royal Society for the Protection of Birds



Site description The Isles of Scilly comprise over 200 low-lying granitic islands and rocks, situated 28 miles to the south-west of Land's End. The habitats here are subject to extreme maritime influences. The flora includes a number of Mediterranean and West European species not found elsewhere in Britain. These islands are of prime importance for breeding seabirds and some wintering wader species.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
European Storm-petrel Hydrobates pelagicus breeding  2006  1,398 breeding pairs  good  B2, C2, C6  Least Concern 
European Shag Phalacrocorax aristotelis breeding  2006  1,296 breeding pairs  good  A4i, B1i, B3, C3  Least Concern 
Ruddy Turnstone Arenaria interpres winter  1984-1985  940 individuals  good  A4i, B1i, C3  Least Concern 
Great Black-backed Gull Larus marinus breeding  2006  901 breeding pairs  poor  B3  Least Concern 
Lesser Black-backed Gull Larus fuscus breeding  2006  3,335 breeding pairs  good  A4i, B1i, B3, C3  Least Concern 
Common Tern Sterna hirundo breeding  1999  96 breeding pairs  good  C6  Least Concern 
Common Tern Sterna hirundo breeding  2006  78 breeding pairs  good  C6  Least Concern 

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Castle Down (Tresco) Site of Special Scientific Interest 58 protected area contained by site 58  
Chapel Down (St Martins) Site of Special Scientific Interest (SSSI) 35 protected area contained by site 35  
Eastern Isles Site of Special Scientific Interest 36 protected area contained by site 36  
Gugh Site of Special Scientific Interest 37 protected area contained by site 37  
Isles of Scilly Area of Outstanding Natural Beauty 1,600 protected area contains site 562  
Isles of Scilly Birds Directive 402 protected area contained by site 402  
Isles of Scilly Heritage Coast 2,285 protected area contains site 562  
Isles of Scilly Wetlands of International Importance (Ramsar) 402 protected area contained by site 402  
Pentle Bay, Merrick and Round Islands Site of Special Scientific Interest 43 protected area contained by site 43  
Samson (with Green, White, Puffin & Stony Islands) Site of Special Scientific Interest 39 protected area contained by site 39  
Shipman Head & Shipman Down (bryher) Site of Special Scientific Interest 40 protected area contained by site 40  
St. Martin's Sedimentary Shore Site of Special Scientific Interest 34 protected area contained by site 34  

Habitats

IUCN habitat Habitat detail Extent (% of site)
Shrubland Heathland  -
Grassland Mesophile grasslands  -
Wetlands (inland) Coastal lagoons; Mud flats and sand flats; Sand dunes and beaches; Shingle or stony beaches; Standing freshwater  -
Sea Open Sea  -
Coastline Rock stacks and islets; Sea cliffs and rocky shores  -

Land use

Land-use Extent (% of site)
tourism/recreation -

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Recommended citation  BirdLife International (2014) Important Bird Areas factsheet: Isles of Scilly. Downloaded from http://www.birdlife.org on 23/04/2014

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