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 1996 6,800 breeding pairs A4ii, B1ii, B2, C2, 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

IBA Monitoring

Most recent IBA monitoring assessment
Year of assessment Threat score (pressure) Condition score (state) Action score (response)
2007 very high not assessed low
Was the whole site covered? Yes State assessed by unset
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%) very rapid to severe deterioration very high

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90%) covered by appropriate conservation designation A management plan exists but it is out of date or not comprehensive Unknown low
For more information about IBA monitoring please click here

IBA Protection

Protection status:

Protected Area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)
Mousa to Boddam Marine Protected Area (OSPAR) 1,300 protected area overlaps with site 0
Mousa to Boddam Nature Conservation Marine Protected Area 1,308 protected area overlaps with site 0
Mousa Site of Community Importance (Habitats Directive) 530 protected area overlaps with site 29
Mousa RSPB Reserve 197 is identical to site 197
Mousa Nature Reserve 197 protected area overlaps with site 0
Mousa Special Protection Area (Birds Directive) 197 is identical to site 197
Mousa Site of Special Scientific Interest (UK) 198 protected area overlaps with site 197
Mousa Marine Protected Area (OSPAR) 0 protected area overlaps with site 0


IUCN Habitat Habitat detail Extent (% of site)
Shrubland Heathland -
Grassland -
Wetlands (inland) Tidal rivers and enclosed tidal waters, Standing freshwater -
Coastline Sea cliffs and rocky shores -
For further information about the habitat classification please click here.

Land use

Land-use Extent (% of site)
agriculture -
For further information about the land use classification please click here.

Recommended citation
BirdLife International (2020) Important Bird Areas factsheet: Mousa. Downloaded from on 27/11/2020.