Gracula religiosa, G. venerata, G. robusta and G. indica (del Hoyo and Collar 2016) were previously lumped as G. religiosa following AOU (1998 and supplements) and Sibley and Monroe (1990, 1993).
del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A., Fishpool, L.D.C., Boesman, P. and Kirwan, G.M. 2016. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Volume 2: Passerines. Lynx Edicions and BirdLife International, Barcelona, Spain and Cambridge, UK.
|A2bd+3d+4bd; C2a(i)||A2bd+3d+4bd; C2a(i); D||A2bd+3d+4bd; C2a(i); D1|
|2016||Critically Endangered||A2bd+3d+4bd; C2a(i)|
|Migratory status||not a migrant||Forest dependency||Medium|
|Land mass type||Average mass||192 g|
|Extent of Occurrence breeding/resident (km2)||12,100||medium|
|Number of locations||11-100||-|
|Estimate||Data quality||Derivation||Year of estimate|
|No. of mature individuals||50-249||medium||estimated||2016|
|Decline (3 years/1 generation past)||-||-||-|
|Decline (5 years/1 generation past)||-||-||-|
|Decline (10 years/1 generation past)||-||-||-|
|Decline (10 years/3 generation future)||80-100||-||-||-|
|Decline (10 years/3 generation past and future)||80-100||-||-||-|
|Number of subpopulations||2-100||-||-||-|
|Generation length (yrs)||4.1||-||-||-|
Population justification: There are potentially two populations, though there are only two recent records of wild individuals on one island and the situation there may be complicated by possible releases that may have taken place. Any wild population on this island numbers fewer than 50 mature individuals. The species has recently been found to still occur at one other island. This population is also clearly small and is here placed in the band 1-49 mature individuals. Concern over poaching from this island is very high. However on another island within the former range the species is apparently now extinct, having disappeared following a period of intense trapping on the island, which principally targeted White-rumped Shama (Eaton et al. 2016).
|Habitat (level 1)||Habitat (level 2)||Importance||Occurrence|
|Forest||Subtropical/Tropical Mangrove Vegetation Above High Tide Level||suitable||resident|
|Forest||Subtropical/Tropical Moist Lowland||major||resident|
|Altitude||Occasional altitudinal limits|
|Threat (level 1)||Threat (level 2)||Impact and Stresses|
|Biological resource use||Hunting & trapping terrestrial animals - Intentional use (species is the target)||Timing||Scope||Severity||Impact|
|Ongoing||Whole (>90%)||Very Rapid Declines||High Impact: 9|
|Invasive and other problematic species, genes & diseases||Timing||Scope||Severity||Impact|
|Future||Whole (>90%)||Very Rapid Declines||Medium Impact: 7|
|Purpose||Primary form used||Life stage used||Source||Scale||Level||Timing|
|Pets/display animals, horticulture||-||-||International||Non-trivial||Recent|
BirdLife International (2017) Species factsheet: Gracula robusta. Downloaded from http://www.birdlife.org on 22/10/2017. Recommended citation for factsheets for more than one species: BirdLife International (2017) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 22/10/2017.