Guguan Island

IBA Justification

The site was identified as important in 2012 because it was regularly supporting significant populations of the species listed below, meeting ('triggering') IBA criteria.

Populations meeting IBA criteria ('trigger species'):
Species Current IUCN Red List Category Season Year(s) Population estimate at site IBA criteria met
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

The current IUCN Red List category may differ from that which was valid at the time of IBA criteria assessment (2012).

IBA Conservation

IBA conservation assessment
Year of assessment (most recent) State (condition) Pressure (threat) Response (action)
2007 not assessed high not assessed
Was the whole site assessed? State assessed by Accuracy of information
no unset -

Pressure (threats to the trigger species and/or their habitats)
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

Response (conservation actions taken for the trigger species and/or their habitats)
Protected-area designation Management planning Other conservation action Result
Not assessed Not assessed Not assessed not assessed
For more information about IBA conservation status, please click here

IBA Protection

Protected area (PA) PA designation PA area (ha) Relationship of PA with IBA Overlap of PA 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 Area factsheet: Guguan Island. Downloaded from on 28/11/2023.