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Long-billed Crow Corvus validus

Justification
This species has been uplisted to Near Threatened on the basis that projected rates of forest loss in its range are suspected to be driving a moderately rapid population decline.

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
Corvus validus is found on the islands of Morotai, Halmahera, Kayoa, Kasiruta, Bacan and Obi, Indonesia (del Hoyo et al. 2009).

Population justification
The global population size has not been quantified, but the species is reported to be relatively numerous in forest on Halmahera (Madge and Burn 1993).

Trend justification
A recent study by Vetter (2009) used remote sensing techniques to track the rate and spatial pattern of forest loss in the North Maluku Endemic Bird Area between 1990 and 2003, and project rates of deforestation over the next three generations for restricted range bird species found in this region. This study estimated the rate of forest loss within the geographic and elevation range of this species to be c.20.3% between 1990 and 2003, and projected the loss of c.37% of forest in its range over the next three generations (estimated to be c.22 years) (Vetter 2009). However, the species shows an apparent tolerance of modified habitats, which would be expected to buffer its population against the loss of primary habitat to some extent. Based on this, the species is suspected to be undergoing a decline of 25-29% over three generations, from 2004 until 2026.

Ecology
The species mainly inhabits primary forest and is locally found in secondary and partially logged forest, and is frequently recorded in agricultural areas, including plantations, and grassland with trees (del Hoyo et al. 2009).

Threats
The primary threat to the species is habitat loss through commercial logging for timber, and clearance for shifting agriculture, mining, settlements and plantations of oil palm, coffee, rubber and timber species (Vetter 2009, Burung Indonesia in litt. 2014). Another potential threat is posed by wildfires, which have devastated areas on other Indonesian islands, with the chances of such fires being increased by the conversion of forest to scrub and grassland and the opening up of forests for road construction, as well as selective logging and fragmentation (Vetter 2009).

Conservation Actions Underway
There are no targeted conservation actions known for this species.

Conservation Actions Proposed
Carry out surveys to assess the species's population size. Conduct regular surveys to monitor the population trend. Track rates of habitat loss through regular studies of satellite images. Increase the area of suitable habitat with protected status.

References
del Hoyo, J.; Elliott, A.; Christie, D. 2009. Handbook of the Birds of the World, vol. 14: Bush-shrikes to Old World Sparrows. Lynx Edicions, Barcelona, Spain.

IUCN. 2012. IUCN Red List of Threatened Species (ver. 2012.1). Available at: http://www.iucnredlist.org. (Accessed: 19 June 2012).

Madge, S.; Burn, H. 1993. Crows and jays: a guide to the crows, jays and magpies of the world. Helm Information, Robertsbridge, U.K.

Vetter, J. 2009. Impacts of Deforestation on the Conservation Status of Endemic Birds in the North Maluku Endemic Bird Area from 1990-2003. Nicholas School of the Environment, Duke University.

Further web sources of information
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
Butchart, S., Ekstrom, J., Symes, A. & Taylor, J.

Contributors
Burung Indonesia

Recommended citation
BirdLife International (2014) Species factsheet: Corvus validus. Downloaded from http://www.birdlife.org on 23/08/2014. Recommended citation for factsheets for more than one species: BirdLife International (2014) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 23/08/2014.

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 Corvidae (Crows and jays)
Species name author Bonaparte, 1851
Population size Unknown mature individuals
Population trend Decreasing
Distribution size (breeding/resident) -
Country endemic? Yes
Links to further information
- Additional Information on this species