Orona Atoll (Hull Island)

IBA Criteria

Year of most recent IBA criteria assessment: 2012

Populations of IBA trigger species
Species Current IUCN Red List Category Season Year(s) of estimate Population estimate IBA Criteria Triggered
Lesser Frigatebird Fregata ariel LC breeding 2006 600 breeding pairs A4ii
Sooty Tern Onychoprion fuscatus LC breeding 2006 600,000 breeding pairs A4i
A4iii Species group - waterbirds n/a breeding 2006 602,310 breeding pairs A4iii

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 medium unfavourable not assessed
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
Invasive and other problematic species and genes invasive non-native/alien species/diseases - named species happening now some of area/population (10-49%) slow but significant deterioration medium

Condition of key/trigger populations (state)
Scientific Common TargetPop ActualPop Units Remaining Result
Onychoprion fuscatus Sooty Tern 3000000 1500000 individuals 50 unfavourable

Conservation actions taken at site (response)
Conservation Designation Management Planning Conservation Action Result
Not assessed Not assessed Not assessed not assessed
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)
Phoenix Islands Protected Area 41,050,000 protected area contains site 742

Recommended citation
BirdLife International (2019) Important Bird Areas factsheet: Orona Atoll (Hull Island). Downloaded from on 24/05/2019.