Uracus Marine

IBA Justification

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 at site IBA criteria triggered
Red-tailed Tropicbird Phaethon rubricauda LC breeding 1979-1988 200 breeding pairs A4ii
Brown Noddy Anous stolidus LC breeding 1979-1988 6,000 breeding pairs A4i
Sooty Tern Onychoprion fuscatus LC breeding 1979-1988 95,000 breeding pairs A4i

Note: The current IUCN Red List category may differ from the category that was valid at the time of IBA criteria assessment.

For more information about the IBA criteria, please click here

IBA Conservation

IBA conservation status - summary
Year of assessment (most recent) Threat (pressure) Condition (state) Action (response)
2012 medium favourable low
Was the whole site assessed? yes Condition (state) assessed by habitat
Accuracy of information poor

Threats to the site (pressure)
Threat level 1 Threat level 2 Timing Scope Severity Result
Climate change and severe weather habitat shifting and alteration likely in long term (beyond 4 years) some of area/population (10-49%) no or imperceptible deterioration low
Pollution garbage & solid waste happening now some of area/population (10-49%) slow but significant deterioration medium

Condition of the site (state), by habitat
Habitat Habitat detail Reference area (ha) Actual area (ha) Habitat quantity (% remaining) Habitat quality (carrying capacity) Result
Sea 0 0 good (> 90%) good (> 90%) favourable

Conservation actions taken at the site (response)
Protected-area designation Management planning Other conservation action Result
Whole area of site (>90%) covered by appropriate conservation designation No management planning has taken place Very little or no conservation action taking place low
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)
Uracas Island Preserve 209 protected area overlaps with site 0
Maug Island Preserve 211 protected area overlaps with site 0
Marianas Trench Marine National Monument Marine National Monument 24,660,830 protected area contains site 1,585,558
Marianas Trench Marine National Monument 77,705 protected area overlaps with site 0
Marianas Trench Marine National Monument 24,851,700 protected area contains site 0
Mariana Arc Of Fire National Wildlife Refuge 22,257 protected area overlaps with site 0


IUCN Habitat Habitat detail Extent (% of site)
Marine Neritic -
For further information about the IUCN habitat classification, please click here.

Recommended citation
BirdLife International (2023) Important Bird Area factsheet: Uracus Marine. Downloaded from http://datazone.birdlife.org/site/factsheet/30985 on 06/06/2023.