West Westray

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
Arctic Tern Sterna paradisaea LC breeding 2000 2,166 breeding pairs C2, C6
Common Murre Uria aalge LC breeding 2007 50,613 individuals B1ii, C3
A4iii Species group - seabirds n/a breeding 1999-2002 43,019 breeding pairs A4iii, C4
A4iii Species group - waterbirds n/a breeding 1999-2002 37,500 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 very 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%) very rapid to severe deterioration very high

Condition of key/trigger populations (state)
Scientific Common TargetPop ActualPop Units Remaining Result
Rissa tridactyla Black-legged Kittiwake 31000 12055 breeding pairs 39 very unfavourable
Sterna paradisaea Arctic Tern 1140 2166 breeding pairs 100 favourable
Alca torda Razorbill 1761 813 individuals 47 unfavourable
Uria aalge Common Murre 60597 50613 individuals 84 near favourable
Species group - seabirds A4iii 44965 43019 breeding pairs 96 favourable
Species group - waterbirds A4iii 32171 37500 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90%) covered by appropriate conservation designation A management plan exists but it is out of date or not comprehensive Not assessed low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)
West Westray Site of Special Scientific Interest (UK) 350 protected area overlaps with site 349
West Westray Special Protection Area (Birds Directive) 3,780 protected area contains site 349
West Westray Marine Protected Area (OSPAR) 0 protected area overlaps with site 0
Noup Cliffs Nature Reserve 21 protected area overlaps with site 0


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

Land use

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

Recommended citation
BirdLife International (2020) Important Bird Areas factsheet: West Westray. Downloaded from on 20/09/2020.