• Summary
• Text account
• Data table and detailed info
• Distribution map
• Reference and further resources

Taxonomic note

Dendrocitta bayleii (del Hoyo and Collar 2016) was previously listed as D. bayleyi.

Taxonomic source(s)
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.

Red List criteria met

Critically Endangered	Endangered	Vulnerable
-	-	D1

Red List history

Year	Category	Criteria
2017	Vulnerable	C2a(i); D1
2016	Near Threatened	B1ab(i,ii,iii,iv,v)
2012	Near Threatened	B1ab(i,ii,iii,iv,v)
2008	Near Threatened	B1a+b(i,ii,iii,iv,v)
2004	Near Threatened
2000	Lower Risk/Near Threatened
1994	Lower Risk/Near Threatened
1988	Near Threatened

Migratory status	not a migrant	Forest dependency	high
Land-mass type		Average mass	-

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	20,600 km2	medium
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	250-999 mature individuals	poor	suspected	2017
Population trend	decreasing	poor	suspected	2006-2026
Generation length	6.7 years	-	-	-

Population justification: Surveys in 1992-1994 (Davidar et al. 1996) and 2007 (Pande et al. 2007) only found limited numbers of individuals, and it has been suggested that there could be fewer than 500 mature individuals remaining (P. Davidar in litt. 2016). It is well documented on eBird (eBird 2017), though this could be a result of survey activity in the area rather than being an accurate representation of abundance. As such, it is tentatively suggested that the population size be placed in the range of 250-999 mature individuals.

Trend justification: Data are lacking on population trends, but slow declines are suspected to be occurring, owing to increasing human population pressure within the species's range.

Country/Territory	Presence	Origin	Resident	Breeding visitor	Non-breeding visitor	Passage migrant
India	extant	native		yes

Country/Territory	IBA Name
India	Austin Strait
India	Barangtang - Rafters Creek
India	Chainpur and Hanspuri
India	Interview Island Wildlife Sanctuary
India	Jarawa Reserve (Middle Andaman and South Andaman)
India	Kadakachang (Katakatchang)
India	Little Andaman
India	Mahatma Gandhi Marine National Park (Wandoor National Park)
India	Mount Diavalo and Cuthbert Bay
India	Mount Harriet National Park
India	North and South Sentinel
India	Rani Jhansi Marine National Park
India	Saddle Peak National Park

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Forest	Subtropical/Tropical Moist Lowland	major	resident
Altitude		Occasional altitudinal limits

Threat (level 1)	Threat (level 2)	Impact and Stresses
Agriculture & aquaculture	Annual & perennial non-timber crops - Agro-industry farming	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Ecosystem degradation
Agriculture & aquaculture	Annual & perennial non-timber crops - Small-holder farming	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Ecosystem degradation, Ecosystem conversion
Biological resource use	Logging & wood harvesting - Unintentional effects: (large scale) [harvest]	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Ecosystem degradation
Biological resource use	Logging & wood harvesting - Unintentional effects: (subsistence/small scale) [harvest]	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Ecosystem degradation
Residential & commercial development	Housing & urban areas	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Ecosystem degradation, Ecosystem conversion

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Recommended citation
BirdLife International (2024) Species factsheet: Andaman Treepie Dendrocitta bayleii. Downloaded from https://datazone.birdlife.org/species/factsheet/andaman-treepie-dendrocitta-bayleii on 23/12/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from https://datazone.birdlife.org/species/search on 23/12/2024.