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 Rhizothera longirostris

This taxon is Not Recognised as a species by BirdLife International.

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

Taxonomic note
Rhizothera longirostris and R. dulitensis (del Hoyo and Collar 2014) were previously lumped as R. longirostris following Sibley and Monroe (1990, 1993).

Distribution and population
Rhizothera longirostris occurs as two quite distinct races, the nominate inhabits the Sundaic lowlands of south Tenasserim, Myanmar, peninsular Thailand, East (Sabah) and Peninsular Malaysia, Singapore, Brunei, and Kalimantan and Sumatra, Indonesia, where it is generally uncommon, and dulitensis has a very restricted range, being confined to Mt Dulit and Mt Batu Song, Sarawak, Indonesia (BirdLife International 2001). No population estimates are available, but it is thought to be declining rapidly owing to habitat loss and degradation.

It inhabits primary and old secondary lowland and hill forest and bamboo, up to 1,500 m in some regions, although not above 1,000 in others (BirdLife International 2001). The race dulitensis is a highland bird of forest on limestone hills.

Forest destruction in the Sundaic lowlands of Indonesia and Malaysia has been extensive (Kalimantan lost nearly 25% of its evergreen forest during 1985-1997, and Sumatra lost almost 30% of its 1985 cover), because of a variety of factors, including the escalation of logging and land conversion, with deliberate targeting of all remaining stands of valuable timber including those inside protected areas, plus forest fires (particularly in 1997-1998), and declines are compounded by trapping for the cage-bird industry (BirdLife International 2001). However, the species's use of secondary growth and higher elevations implies that it is not immediately threatened.

Conservation Actions Underway
It occurs in a number of protected areas, including Taman Negara National Park and Gunung Leuser National Park. Conservation Actions Proposed
Survey to assess the population size. Protect large areas of primary and old secondary forest within its range. Investigate the taxonomic status of the race dulitensis.

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

del Hoyo, J.; Elliott, A.; Sargatal, J. 1994. Handbook of the Birds of the World, vol. 2: New World Vultures to Guineafowl. 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
Mahood, S., Benstead, P., Taylor, J.

Recommended citation
BirdLife International (2015) Species factsheet: Rhizothera longirostris. Downloaded from on 07/07/2015. Recommended citation for factsheets for more than one species: BirdLife International (2015) IUCN Red List for birds. Downloaded from on 07/07/2015.

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 Not Recognised
Family Phasianidae (Pheasants, Partridges, Turkeys, Grouse)
Species name author Ogilvie-Grant, 1905