UM001
Navassa


IBA Justification

The site was identified as important in 2007 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
White-crowned Pigeon Patagioenas leucocephala NT resident 2006 150-300 individuals A1
Red-footed Booby Sula sula LC resident 2006 5,000-7,000 individuals A4ii

The current IUCN Red List category may differ from that which was valid at the time of IBA criteria assessment (2007).


IBA Conservation

IBA conservation assessment
Year of assessment (most recent) State (condition) Pressure (threat) Response (action)
2008 unfavourable medium low
Was the whole site assessed? State assessed by Accuracy of information
yes habitat good

State (condition of the trigger species' populations)
Scientific name Common name Reference population Actual population Units % of population remaining Result
Fregata magnificens Magnificent Frigatebird 175 175 individuals 100 favourable
Sula sula Red-footed Booby 6000 6000 individuals 100 favourable

State (condition of the trigger species' habitats)
Habitat Habitat detail Reference area (ha) Actual area (ha) Habitat quantity (% remaining) Habitat quality (carrying capacity) Result
Marine Coastal/Supratidal 0 0 moderate (70-90%) moderate (70-90%) unfavourable
Shrubland 0 0 moderate (70-90%) moderate (70-90%) unfavourable

Pressure (threats to the trigger species and/or their habitats)
Threat level 1 Threat level 2 Timing Scope Severity Result
Biological resource use hunting & collecting terrestrial animals - intentional use (species being assessed is the target) 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
Whole area of site (>90%) covered by appropriate conservation designation No management plan exists but the management planning process has begun Some limited conservation initiatives are in 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)
Navassa Island National Wildlife Refuge 147,366 protected area overlaps with site 0
Navassa Island National Wildlife Refuge 147,690 protected area contained by site 147,690

Habitats

Habitat (IUCN level 1) Habitat detail Extent (% of site)
Forest Lowland evergreen rain forest (tropical) -
Shrubland -
Marine Neritic -
Marine Coastal/Supratidal -
For more information about the IUCN Habitat classification, please click here.

Land use

Land-use Extent (% of site)
nature conservation and research -
hunting -


Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Navassa. Downloaded from https://datazone.birdlife.org/site/factsheet/navassa-iba-united-states-minor-outlying-islands-(to-usa) on 28/02/2024.