Guguan 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
Micronesian Scrubfowl Megapodius laperouse NT resident - present A1, A2
White-throated Ground-dove Pampusana xanthonura NT resident - present A1, A2
Sooty Tern Onychoprion fuscatus LC non-breeding 1979-1988 37,655 individuals A4i
Grey-backed Tern Onychoprion lunatus LC breeding 1979-1988 1,200 breeding pairs A4i
Micronesian Myzomela Myzomela rubratra LC resident - present A2
Micronesian Starling Aplonis opaca LC resident - present A2
A4iii Species group - waterbirds n/a unknown 1979-1988 40,273 individuals 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 high not assessed not assessed
Was the whole site covered? No State assessed by unset
Accuracy of information -

Threats to the site (pressure)
Threat Level 1 Threat Level 2 Timing Scope Severity Result
Geological events volcanic eruptions likely in long term (beyond 4 years) whole area/population (>90%) very rapid to severe deterioration high
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

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

Protected Area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)
Guguan Island Preserve 424 protected area overlaps with site 0
Guguan Island Preserve 412 is identical to site 412

Recommended citation
BirdLife International (2023) Important Bird Areas factsheet: Guguan Island. Downloaded from on 06/02/2023.