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Grey-bellied Bulbul Pycnonotus cyaniventris

Justification
Although this species remains widespread and common in many areas, it is suspected to be declining moderately rapidly in line with rates of forest destruction and degradation. It is therefore considered Near Threatened, and should be carefully monitored.

Taxonomic source(s)
Sibley, C. G.; Monroe, B. L. 1990. Distribution and taxonomy of birds of the world. Yale University Press, New Haven, USA.

Distribution and population
Pycnonotus cyaniventris is confined to the Sundaic lowlands, from south Tenasserim, Myanmar, peninsular Thailand, Sabah, Sarawak and Peninsular Malaysia, Kalimantan and Sumatra (including Mentawai Island), Indonesia and Brunei (BirdLife International 2001). It is locally fairly common to common in suitable habitat.

Population justification
The global population size has not been quantified, but the species is described as locally fairly common to common, although rare in southern Myanmar and generally uncommon in Borneo (del Hoyo et al. 2005).

Trend justification
This species is largely dependent on native forests, and is therefore likely to be declining moderately rapidly across much of its range as a result of on-going habitat loss through deforestation.

Ecology
This species occurs in broadleaved evergreen forest in the lowlands, although it may be commoner in hill forest above 400 m, with an upper limit of 1,200 m. It generally avoids plantations or other non-native woodlands, although it does occur in tall secondary forest or logged forest, provided that some high canopy cover remains (del Hoyo et al. 2005).

Threats
Rates of forest loss in the Sundaic lowlands have been extremely rapid, owing partly to the escalation of illegal logging and land conversion, with deliberate targeting of all remaining stands of valuable timber including those inside protected areas. Forest fires have also had a damaging effect (particularly in 1997-1998). The magnitude of these threats may be allayed by this species's tolerance of hill forest, as well as some secondary habitats.

Conservation Actions Underway
No targeted conservation actions are known for this species, although it does occur in a number of protected areas.

Conservation Actions Proposed
Conduct repeated surveys within the species's range to determine its current distribution and abundance, as well as assess population trends and rates of habitat loss. Conduct ecological studies to improve understanding of its precise habitat requirements, tolerance of secondary habitats and response to fragmentation. Effectively protect significant areas of suitable forest at key sites, in both strictly protected areas and community-led multiple use areas.

References
BirdLife International. 2001. Threatened birds of Asia: the BirdLife International Red Data Book. BirdLife International, Cambridge, U.K.

del Hoyo, J.; Elliott, A.; Christie, D. 2005. Handbook of the Birds of the World, vol. 10: Cuckoo-shrikes to Thrushes. Lynx Edicions, Barcelona, Spain.

Further web sources of information
Detailed species accounts from the Threatened birds of Asia: the BirdLife International Red Data Book (BirdLife International 2001).

Text account compilers
Benstead, P., Gilroy, J., Taylor, J.

IUCN Red List evaluators
Butchart, S., Symes, A.

Recommended citation
BirdLife International (2014) Species factsheet: Pycnonotus cyaniventris. Downloaded from http://www.birdlife.org on 12/07/2014. Recommended citation for factsheets for more than one species: BirdLife International (2014) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 12/07/2014.

This information is based upon, and updates, the information published in BirdLife International (2000) Threatened birds of the world. Barcelona and Cambridge, UK: Lynx Edicions and BirdLife International, BirdLife International (2004) Threatened birds of the world 2004 CD-ROM and BirdLife International (2008) Threatened birds of the world 2008 CD-ROM. These sources provide the information for species accounts for the birds on the IUCN Red List.

To provide new information to update this factsheet or to correct any errors, please email BirdLife

To contribute to discussions on the evaluation of the IUCN Red List status of Globally Threatened Birds, please visit BirdLife's Globally Threatened Bird Forums.

Key facts
Current IUCN Red List category Near Threatened
Family Pycnonotidae (Bulbuls)
Species name author Blyth, 1842
Population size Unknown mature individuals
Population trend Decreasing
Distribution size (breeding/resident) 927,000 km2
Country endemic? No
Links to further information
- Additional Information on this species