Flannan Isles

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
Leach's Storm-petrel Hydrobates leucorhous VU breeding 2001 1,425 breeding pairs B1ii, B2, C2, C6
Atlantic Puffin Fratercula arctica VU breeding 1998-2001 15,761 breeding pairs B1ii, B2, C3
Razorbill Alca torda LC breeding 1998 1,569 individuals B3
A4iii Species group - seabirds n/a breeding 1998-2001 37,031 breeding pairs A4iii, C4

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 high very unfavourable low
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
Climate change and severe weather habitat shifting and alteration happening now whole area/population (>90%) slow but significant deterioration high

Condition of key/trigger populations (state)
Scientific Common TargetPop ActualPop Units Remaining Result
Hydrobates pelagicus European Storm-petrel 100 7 breeding pairs 8 very unfavourable
Hydrobates leucorhous 100 1425 breeding pairs 100 favourable
Fratercula arctica Atlantic Puffin 6279 15761 breeding pairs 100 favourable
Alca torda Razorbill 3889 1569 individuals 41 unfavourable
Species group - seabirds A4iii 30026 37031 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90%) covered by appropriate conservation designation A management plan exists but it is out of date or not comprehensive Very little or no conservation action taking place low
For more information about IBA monitoring please click here

IBA Protection

Protected Area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)
Flannan Isles Marine Protected Area (OSPAR) 0 protected area overlaps with site 0
Flannan Isles Site of Special Scientific Interest (UK) 58 protected area overlaps with site 59
Flannan Isles Special Protection Area (Birds Directive) 5,833 protected area contains site 59


IUCN Habitat Habitat detail Extent (% of site)
Grassland Humid grasslands -
Coastline Rock stacks and islets -
For further information about the habitat classification please click here.

Land use

Land-use Extent (% of site)
other -
not utilised -
For further information about the land use classification please click here.

Recommended citation
BirdLife International (2022) Important Bird Areas factsheet: Flannan Isles. Downloaded from on 25/09/2022.