NT
Comoro Blue-pigeon Alectroenas sganzini



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. Volume 1: Non-passerines. Lynx Edicions BirdLife International, Barcelona, Spain and Cambridge, UK.

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

Red List history
Year Category Criteria
2017 Near Threatened B1ab(v)+2ab(v)
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 not a migrant Forest dependency High
Land mass type Average mass -
Distribution

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 69,600
Extent of Occurrence breeding/resident (km2) 1,100
Number of locations -
Severely Fragmented -
Population and trend
Value Data quality Derivation Year of estimate
No. of mature individuals unknown not applicable not applicable 0
Population trend Decreasing 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 - - -
Percentage in largest subpopulation - - -
Generation length (yrs) 6.6 - - -

Population justification: The global population size has not been quantified, but the species is reported to be extinct in some localities, common in others and extinct on several small islands (del Hoyo et al. 1997). The population on Mayotte has been estimated at 9,800 individuals (Rocamora 2004).

Trend justification: There appears to be no evidence of a decline in the species between 1985 and 1989 on the Comoros (Stevens et al. 1992). However, hunting does continue to be a threat to the species and so the population is tentatively suspected to be in decline owing to unsustainable levels of exploitation.


Country/territory distribution
Country/Territory Occurrence status Presence Resident Breeding Non-breeding Passage
Comoros N Extant Yes
Mayotte (to France) N Extant Yes
Seychelles N Extant Yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Comoros Karthala Mountains
Comoros La Grille Mountains
Comoros Mont Mlédjélé (Mwali highlands)
Comoros Ndzuani highlands
Seychelles Aldabra Special Reserve
Mayotte (to France) Crêtes du Nord Forest Reserve
Mayotte (to France) Mlima Combani and Mlima Mtsapéré
Mayotte (to France) Mount Bénara Forest Reserve
Mayotte (to France) Crêtes du Sud Forest Reserve

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Subtropical/Tropical Mangrove Vegetation Above High Tide Level suitable resident
Forest Subtropical/Tropical Moist Lowland suitable resident
Forest Subtropical/Tropical Moist Montane suitable resident
Altitude 0 - 1800 m Occasional altitudinal limits  

Threats & impact
Threat (level 1) Threat (level 2) Impact and Stresses
Agriculture & aquaculture Annual & perennial non-timber crops - Shifting agriculture Timing Scope Severity Impact
Ongoing Minority (<50%) Negligible declines Low Impact: 4
Stresses
Ecosystem degradation, Ecosystem conversion
Biological resource use Hunting & trapping terrestrial animals - Intentional use (species is the target) Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Declines Medium Impact: 6
Stresses
Species mortality
Biological resource use Logging & wood harvesting - Unintentional effects: (subsistence/small scale) [harvest] Timing Scope Severity Impact
Ongoing Minority (<50%) Negligible declines Low Impact: 4
Stresses
Ecosystem degradation, Ecosystem conversion

Utilisation
Purpose Primary form used Life stage used Source Scale Level Timing
Food - human - - Non-trivial Recent

Recommended citation
BirdLife International (2021) Species factsheet: Alectroenas sganzini. Downloaded from http://www.birdlife.org on 20/10/2021. Recommended citation for factsheets for more than one species: BirdLife International (2021) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 20/10/2021.