VU
Bristle-thighed Curlew Numenius tahitiensis



Taxonomy

Taxonomic source(s)
del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A. and Fishpool, L.D.C. 2014. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Lynx Edicions BirdLife International, Barcelona, Spain and Cambridge, UK.
del Hoyo, J.; Collar, N. J.; Christie, D. A.; Elliott, A.; Fishpool, L. D. C. 2014. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Barcelona, Spain and Cambridge UK: Lynx Edicions and BirdLife International.
Turbott, E. G. 1990. Checklist of the birds of New Zealand. Ornithological Society of New Zealand, Wellington.
Turbott, E.G. 1990. Checklist of the birds of New Zealand. Ornithological Society of New Zealand, Wellington.

IUCN Red list criteria met and history
Red List criteria met
Critically Endangered Endangered Vulnerable
- - C2a(ii)

Red List history
Year Category Criteria
2016 Vulnerable C2a(ii)
2012 Vulnerable C2a(ii)
2008 Vulnerable C2a(ii)
2006 Vulnerable
2004 Vulnerable
2000 Vulnerable
1996 Vulnerable
1994 Vulnerable
1988 Threatened
Species attributes

Migratory status full migrant Forest dependency Does not normally occur in forest
Land mass type Land-mass type - continent
Average mass -
Extent of occurrence (EOO)

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 95,900 medium
Extent of Occurrence non-breeding (km2) 34,500,000 medium
Number of locations -
Fragmentation -
Population and trend
Estimate Data quality Derivation Year of estimate
No. of mature individuals 7000 medium estimated 2001
Population trend Decreasing poor suspected -
Decline (3 years/1 generation past) - - -
Decline (5 years/1 generation past) - - -
Decline (10 years/1 generation past) - - -
Decline (10 years/3 generation future) 10-19 - - -
Decline (10 years/3 generation past and future) - - -
Number of subpopulations 1 - - -
Largest subpopulations 100 - - -
Generation length (yrs) 11.6 - - -

Population justification: Morrison et al. (2001) estimated the population to number 7,000 breeding mature individuals and 3,000 immatures, giving a total of 10,000 individuals.

Trend justification: This species's population is suspected to be decreasing at a moderate rate, owing mainly to the expected impacts of predation and hunting on its wintering grounds.


Country/territory distribution
Country/Territory Occurrence status Presence Resident Breeding Non-breeding Passage
American Samoa N Extant Yes
Chile N Extant Yes
Cook Islands N Extant Yes
Fiji N Extant Yes
French Polynesia N Extant Yes
Guam (to USA) N Extant Yes
Indonesia V Extant Yes
Japan V Extant Yes
Kiribati N Extant Yes
Marshall Islands N Extant Yes
Micronesia, Federated States of N Extant Yes
Nauru N Extant Yes
New Zealand N Extant Yes
Niue (to New Zealand) N Extant Yes
Northern Mariana Islands (to USA) N Extant Yes
Papua New Guinea V Extant
Philippines V Extant Yes
Pitcairn Islands (to UK) N Extant Yes
Samoa N Extant Yes
Solomon Islands N Extant Yes
Tokelau (to New Zealand) N Extant Yes
Tonga N Extant Yes
Tuvalu N Extant Yes
United States Minor Outlying Islands (to USA) N Extant Yes
USA N Extant Yes
Wallis and Futuna Islands (to France) N Extant Yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Cook Islands Atiu
Cook Islands Ma'uke Island
Cook Islands Mangaia
Cook Islands Miti'aro Island
Cook Islands Suwarrow Atoll National Park
Cook Islands Takutea Wildlife Sanctuary
French Polynesia Anuanuraro
French Polynesia Apataki, Arutua et Kaukura (Îles Palliser)
French Polynesia Fangataufa
French Polynesia Fatu Huku
French Polynesia Manuae, Motu One et Maupihaa
French Polynesia Maria
French Polynesia Morane
French Polynesia Motane (Mohotani)
French Polynesia Motu de l'ouest et du sud de Rangiroa
French Polynesia Nord-ouest de Nuku Hiva
French Polynesia Pentes du mont Hiro de Raivavae
French Polynesia Rapa
French Polynesia Reitoru
French Polynesia Tahanea
French Polynesia Tahuata
French Polynesia Tenararo
French Polynesia Tikehau
French Polynesia Vahanga
Kiribati Millenium (Caroline) Island
Pitcairn Islands (to UK) Henderson Island
Pitcairn Islands (to UK) Oeno Island
Tonga Maninita, Taula, Lualoli
United States Minor Outlying Islands (to USA) Howland Island
United States Minor Outlying Islands (to USA) Jarvis Island
United States Minor Outlying Islands (to USA) Palmyra Atoll
USA Andreafsky Wilderness
USA Central Seward Peninsula
USA Central Yukon-Kuskokwim
USA James Campbell National Wildlife Refuge
USA Northwestern Hawaiian Islands

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Grassland Tundra major breeding
Marine Coastal/Supratidal Coastal Brackish/Saline Lagoons/Marine Lakes major non-breeding
Marine Intertidal Mud Flats and Salt Flats suitable non-breeding
Marine Intertidal Sandy Shoreline and/or Beaches, Sand Bars, Spits, Etc suitable non-breeding
Altitude 0 - 350 m Occasional altitudinal limits  

Threats & impact
Threat (level 1) Threat (level 2) Impact and Stresses
Biological resource use Hunting & trapping terrestrial animals Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Species mortality
Climate change & severe weather Habitat shifting & alteration Timing Scope Severity Impact
Future Whole (>90%) Unknown Unknown
Stresses
Indirect ecosystem effects, Ecosystem degradation
Energy production & mining Mining & quarrying Timing Scope Severity Impact
Future Minority (<50%) Slow, Significant Declines Low Impact: 3
Stresses
Ecosystem degradation, Ecosystem conversion
Invasive and other problematic species, genes & diseases Invasive non-native/alien species/diseases Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Declines Medium Impact: 6
Stresses
Species mortality
Invasive and other problematic species, genes & diseases Invasive non-native/alien species/diseases Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Declines Medium Impact: 6
Stresses
Species mortality
Invasive and other problematic species, genes & diseases Invasive non-native/alien species/diseases Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Declines Medium Impact: 6
Stresses
Species mortality
Invasive and other problematic species, genes & diseases Invasive non-native/alien species/diseases Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Declines Medium Impact: 6
Stresses
Species mortality
Pollution Industrial & military effluents Timing Scope Severity Impact
Ongoing Minority (<50%) Unknown Unknown
Stresses
Species mortality

Utilisation
Purpose Primary form used Life stage used Source Scale Level Timing
Food (human) Whole Adults and juveniles Wild Non-trivial Recent
Food - human - - - Non-trivial Recent

Recommended citation
BirdLife International (2017) Species factsheet: Numenius tahitiensis. Downloaded from http://www.birdlife.org on 19/10/2017. Recommended citation for factsheets for more than one species: BirdLife International (2017) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 19/10/2017.