North Rona and Sula Sgeir

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
European Storm-petrel Hydrobates pelagicus LC breeding 2001 377 breeding pairs B2
Leach's Storm-petrel Hydrobates leucorhous VU breeding 1998 1,137 breeding pairs B1ii, B2, C2, C6
Northern Gannet Morus bassanus LC breeding 1998 10,703 breeding pairs A4ii, B1ii, B2, C3
Great Black-backed Gull Larus marinus LC breeding 1998 983 breeding pairs B3
Razorbill Alca torda LC breeding 1998 1,625 individuals B3
Common Murre Uria aalge LC breeding 1998 31,374 individuals B1ii, C3
A4iii Species group - seabirds n/a breeding 1998-2001 43,314 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 near favourable 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
Morus bassanus Northern Gannet 10400 10703 breeding pairs 100 favourable
Larus marinus Great Black-backed Gull 735 983 breeding pairs 100 favourable
Alca torda Razorbill 1550 1625 individuals 100 favourable
Uria aalge Common Murre 43134 31374 individuals 73 near favourable
Species group - seabirds A4iii 55208 43314 breeding pairs 79 near 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90%) covered by appropriate conservation designation A management plan exists but it is out of date or not comprehensive Very little or no conservation action taking place low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)
Rona and Sula Sgeir National Nature Reserve 139 is identical to site 130
North Rona and Sula Sgeir Special Protection Area (Birds Directive) 6,851 protected area contains site 138
North Rona and Sula Sgeir Marine Protected Area (OSPAR) 0 protected area overlaps with site 0
North Rona and Sula Sgeir Site of Special Scientific Interest (UK) 138 protected area overlaps with site 130
North Rona Site of Community Importance (Habitats Directive) 629 protected area overlaps with site 125
North Rona Marine Protected Area (OSPAR) 0 protected area overlaps with site 0


IUCN Habitat Habitat detail Extent (% of site)
Grassland -
Coastline Sea cliffs and rocky shores, Rock stacks and islets -
For further information about the habitat classification please click here.

Land use

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

Recommended citation
BirdLife International (2022) Important Bird Areas factsheet: North Rona and Sula Sgeir. Downloaded from on 30/09/2022.