Papa Westray (North Hill and Holm)

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 2007 800 breeding pairs C6
Black Guillemot Cepphus grylle LC breeding 2007 294 individuals B1ii, B2, C3

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 unfavourable medium
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%) moderate to rapid deterioration very high

Condition of key/trigger populations (state)
Scientific Common TargetPop ActualPop Units Remaining Result
Sterna paradisaea Arctic Tern 1690 800 breeding pairs 48 unfavourable
Cepphus grylle Black Guillemot 380 294 individuals 78 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90%) covered by appropriate conservation designation A management plan exists but it is out of date or not comprehensive Substantive conservation measures are being implemented but these are not comprehensive and are limited by resources and capacity medium
For more information about IBA monitoring please click here

IBA Protection

Protected Area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)
Papa Westray (North Hill and Holm) Special Protection Area (Birds Directive) 246 is identical to site 245
Papa Westray Nature Conservation Marine Protected Area 3,330 protected area overlaps with site 0
Papa Westray Marine Protected Area (OSPAR) 3,300 protected area overlaps with site 0
North Hill Site of Special Scientific Interest (UK) 201 protected area overlaps with site 206
North Hill RSPB Reserve 201 protected area contained by site 201
North Hill Nature Reserve 201 protected area overlaps with site 0
Holm of Papa Westray Site of Special Scientific Interest (UK) 45 protected area overlaps with site 48


IUCN Habitat Habitat detail Extent (% of site)
Shrubland Heathland -
Grassland -
Wetlands (inland) Standing freshwater -
Coastline Sea cliffs and rocky shores -
Marine Coastal/Supratidal -
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 (2023) Important Bird Areas factsheet: Papa Westray (North Hill and Holm). Downloaded from on 27/03/2023.