LC
Straw-necked Ibis Threskiornis spinicollis



Taxonomy

Taxonomic source(s)
Christidis, L. and Boles, W.E. 2008. Systematics and taxonomy of Australian birds. CSIRO Publishing, Collingwood, Australia.
Christidis, L.; Boles, W. E. 2008. Systematics and taxonomy of Australian birds. CSIRO Publishing, Collingwood, Australia.
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.

IUCN Red list criteria met and history
Red List criteria met
Critically Endangered Endangered Vulnerable
- - -

Red List history
Year Category Criteria
2016 Least Concern
2012 Least Concern
2009 Least Concern
2008 Least Concern
2004 Least Concern
2000 Lower Risk/Least Concern
1994 Lower Risk/Least Concern
1988 Lower Risk/Least Concern
Species attributes

Migratory status full migrant Forest dependency Low
Land mass type Average mass -
Extent of occurrence (EOO)

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 9,580,000
Extent of Occurrence non-breeding (km2) 11,100,000
Number of locations -
Fragmentation -
Population and trend
Estimate Data quality Derivation Year of estimate
No. of mature individuals poor estimated 2009
Population trend Stable 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) - - -
Decline (10 years/3 generation past and future) - - -
Number of subpopulations - - -
Largest subpopulations - - -
Generation length (yrs) 10.1 - - -

Population justification: The population is estimated to number 1,000,000 individuals.

Trend justification: The overall population trend is fluctuating, although some populations are stable and others have unknown trends (Wetlands International 2006).


Country/territory distribution
Country/Territory Occurrence status Presence Resident Breeding Non-breeding Passage
Australia N Extant Yes
Indonesia N Extant
Norfolk Island (to Australia) V Extant
Papua New Guinea N Extant

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Australia Alligator Rivers Floodplains
Australia Arafura Swamp
Australia Broad Sound
Australia Cooper Floodplain Below Windorah
Australia Diamantina and Astrebla Grasslands
Australia Fortescue Marshes
Australia Gwydir Wetlands
Australia Hunter Estuary
Australia Lake Corangamite Complex
Australia Lake Machattie Area
Australia Lake Sylvester System
Australia Lowbidgee Floodplain
Australia Macquarie Marshes
Australia Mandora Marsh and Anna Plains
Australia Narran Wetlands
Australia North Victorian Wetlands
Australia Swan Bay and Port Phillip Bay Islands
Australia Tarrabool Lake-Eva Downs Swamp System

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Artificial/Aquatic & Marine Artificial/Aquatic - Irrigated Land (includes irrigation channels) suitable non-breeding
Artificial/Aquatic & Marine Artificial/Aquatic - Irrigated Land (includes irrigation channels) suitable breeding
Artificial/Terrestrial Arable Land suitable non-breeding
Artificial/Terrestrial Arable Land suitable breeding
Artificial/Terrestrial Pastureland suitable breeding
Artificial/Terrestrial Pastureland suitable non-breeding
Forest Subtropical/Tropical Dry suitable breeding
Forest Subtropical/Tropical Dry suitable non-breeding
Grassland Temperate suitable breeding
Grassland Temperate suitable non-breeding
Altitude   Occasional altitudinal limits  

Utilisation
Purpose Primary form used Life stage used Source Scale Level Timing
Pets Whole Adults and juveniles Wild International Non-trivial Recent

Recommended citation
BirdLife International (2017) Species factsheet: Threskiornis spinicollis. Downloaded from http://www.birdlife.org on 23/11/2017. Recommended citation for factsheets for more than one species: BirdLife International (2017) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 23/11/2017.