email a friend
printable version
NT
Asian Green Broadbill Calyptomena viridis

Justification
Although this species remains common in many parts of its large range, it is considered Near Threatened as it is highly sensitive to habitat loss and degradation, which are likely to have caused moderately rapid population declines throughout its range.

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
Calyptomena viridis occurs in the Sundaic lowlands, from south Tenasserim, Myanmar, peninsular and west Thailand, Sabah, Sarawak and Peninsular Malaysia, Singapore (formerly), Kalimantan (including the Natuna Islands) and Sumatra (including offshore islands), Indonesia and Brunei (BirdLife International 2001). It is locally common to fairly common in suitable habitat.

Population justification
The population size of this species has not been quantified; it is considered fairly common to locally common.

Trend justification
Data on trends are lacking, but declines have inevitably occurred as this species is very sensitive to logging, and continued habitat loss throughout its range has been rapid and extensive. An on-going and moderately rapid population decline is therefore suspected overall.

Ecology
This species occurs primarily in the understorey of primary evergreen and mixed dipterocarp forest in the lowlands, principally below 800 m, but occasionally to 1,700 m. It is also found in tall secondary forest and other secondary habitats if primary forest is adjacent. These habitats may only be used for foraging. Studies have revealed marked declines in density following logging activities (del Hoyo et al. 2003).

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).

Conservation Actions Underway
No targeted conservation actions are known for this species, although it occurs in a number of protected areas. Conservation Actions Proposed
Conduct repeated surveys across the species's range to determine the magnitude of declines and rates of range contraction. Conduct ecological studies to improve understanding of its precise habitat requirements, tolerance of secondary habitats and response to fragmentation. Campaign for the protection of remaining tracts of lowland forest throughout the species's range.

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. 2003. Handbook of the Birds of the World, vol. 8: Broadbills to Tapaculos. 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).

Explore HBW Alive for further information on this species

Search for photos and videos, and hear sounds of this species from the Internet Bird Collection

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

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

Recommended citation
BirdLife International (2014) Species factsheet: Calyptomena viridis. Downloaded from http://www.birdlife.org on 22/12/2014. Recommended citation for factsheets for more than one species: BirdLife International (2014) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 22/12/2014.

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.

Additional resources for this species

ARKive species - Green broadbill (Calyptomena viridis) 0

Key facts
Current IUCN Red List category Near Threatened
Family Eurylaimidae (Broadbills)
Species name author Raffles, 1822
Population size Unknown mature individuals
Population trend Decreasing
Distribution size (breeding/resident) 2,910,000 km2
Country endemic? No
Links to further information
- Additional Information on this species