Heliopais personatus


Taxonomy [top]

Kingdom Phylum Class Order Family

Scientific Name: Heliopais personatus
Species Authority: (Gray, 1849)
Common Name(s):
English Masked Finfoot, Asian Finfoot
Heliopais personata Sibley and Monroe (1990, 1993)
Heliopais personata BirdLife International (2004)
Heliopais personata BirdLife International (2000)
Heliopais personata Collar et al. (1994)
Heliopais personata Collar and Andrew (1988)
Taxonomic Notes: Gender agreement of species name follows David and Gosselin (2002b).

Assessment Information [top]

Red List Category & Criteria: Endangered A2cd+3cd+4cd; C2a(i) ver 3.1
Year Published: 2012
Date Assessed: 2012-05-01
Assessor(s): BirdLife International
Reviewer(s): Butchart, S. & Symes, A.
Contributor(s): Duckworth, W., Eames, J.C., Eaton, J., Iqbal, M., Mansur, E., Thompson, P., Tordoff, J. & Mahood, S.
Facilitator/Compiler(s): Benstead, P., Bird, J., Davidson, P., Peet, N., Taylor, J., Tobias, J. & Allinson, T
This elusive species has a very small, and very rapidly declining population as a result of the ongoing loss and degradation of wetlands and especially riverine lowland forest in Asia; it therefore qualifies as Endangered.

Geographic Range [top]

Range Description: Heliopais personatus is patchily distributed from north-east India and Bangladesh, through Myanmar, Thailand, Cambodia, Laos and Vietnam to Peninsular Malaysia, Sumatra and Java (one record), Indonesia (BirdLife International 2001). Populations are apparently in steep decline throughout its range such that its population is now thought to number in the low thousands at most, and possibly fewer than 1,000 mature individuals (J. C. Eames in litt. 2007). The last records from Sumatra date back to 1996. Elsewhere it continues to be recorded from the Sundarbans of Bangladesh (Mansur in litt. 2005) and it was recently recorded in Bharatpur district, India (Verma and Mathur 2006); there are recent records from Cambodia, Thailand and Peninsular Malaysia. Kachin state, Myanmar is the least known part of its range; the area probably supports the largest remaining population and it was recorded as still relatively common during wetland surveys in the early 2000s (J. C. Eames in litt. 2007). Its movements are poorly known; it appears to occur as a migrant in parts of the range, but breeding has been reported recently from Cambodia, Myanmar and Bangladesh (Neumann-Denzau 2008), and birds are recorded in most seasons in the Sundarbans and Myanmar. No empirical estimates exist for the current rate of decline, but as a species reliant on undisturbed wetlands declines are anticipated across its range given the pressure on riverine and mangrove habitats. Threats in Myanmar (now assumed to be the species's stronghold) remain largely unknown, but several major river systems that have until now remained in a largely natural state, are now threatened by dam development and heavy immigration (W. Duckworth in litt. 2008).

Bangladesh; Cambodia; India; Indonesia; Lao People's Democratic Republic; Malaysia; Myanmar; Singapore; Thailand; Viet Nam
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: The species appears to have declined dramatically and is now known from comparatively few sites, occurring at low densities everywhere. The population may now number as low as 1,000 individuals (J. C. Eames in litt. 2007), and so is placed in the band 1,000-2,499 individuals. This equates to 667-1,666 mature individuals, rounded here to 600-1,700 mature individuals.
Population Trend: Decreasing

Habitat and Ecology [top]

Habitat and Ecology: It occurs principally in rivers in lowland riverine forest including mangroves, but has been recorded in coastal and inland wetlands, such as tidal creeks, flooded forest, swamps and lakes (rarely reservoirs or industrial pools on passage). In the Sundarbans of Bangladesh all records originate from the fresh and brackish waters with no records from the saltwater zone (Gani 2005). Most breeding appears to occur inland while most records are from lowlands, although it has occurred up to 1,220 m on migration. There is an emerging pattern of non-breeding season records in peninsular Thailand, Malaysia and Indonesia and breeding season records in continental South-East Asia, with passage migrants observed between these ranges. It has been observed catching freshwater shrimp, large beetles and small fish (Shepherd 2006), but feeds mainly by gleaning insects from overhanging vegetation (J. C. Eames in litt. 2007). The species is generally very shy and retiring but can appear extremely tame and confiding while incubating, rendering it susceptible to human predation (Neumann-Denzau 2008).

Systems: Terrestrial; Freshwater

Threats [top]

Major Threat(s): The main threat is the destruction and increased levels of disturbance to rivers in lowland riverine forest, driven by agricultural clearance and logging operations and increased traffic on waterways. Habitats have been further degraded by the removal of bankside vegetation and changes in hydrology resulting from dam construction, and siltation. Hunting and collection of eggs and chicks have been recorded and although their contribution to population declines is probably minimal this requires clarification (Neumann-Denzau 2008); indeed the species is easily caught at the nest making it prey to opportunistic human hunters.

Conservation Actions [top]

Conservation Actions: Conservation Actions Underway
It has been recorded in protected areas in most range states, potentially the most important being the Sundarbans, Bangladesh, and the Chindwin Basin in northern Myanmar. It is depicted on conservation awareness material in Cambodia and Laos. The proposed Hukaung Tiger Reserve in Myanmar covers an area that is considered to be of high national and global significance for the species (Tordoff et al. in press).

Conservation Actions Proposed
Conduct extensive surveys to clarify its distribution, population status, breeding range and seasonal movements. Investigate its ecological requirements and tolerance of habitat degradation and disturbance. Afford protected-area status to key breeding sites, and strictly minimise habitat loss, hunting and disturbance within them. Campaign for increased protected-area representation for riverine habitats, particularly in Myanmar, Thailand, Malaysia and Indonesia.

Bibliography [top]

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

Gani, M.O. 2005. Distribution of Masked Finfoot Heliopais personata in the Sundarbans Reserved Forest of Bangladesh. Journal of the Bombay Natural History Society 102: 112-114.

IUCN. 2012. IUCN Red List of Threatened Species (ver. 2012.1). Available at: (Accessed: 19 June 2012).

Neumann-Denzau, G.; Mansur, E. F.; Mansur, R. 2008. Nests, eggs, hatchlings and behaviour of the Masked Finfoot Heliopais personatus from the Sundarbans in Bangladesh, with first nesting observations. Forktail: 92-99.

Shepherd, C. R. 2006. Some recent behavioural observations of Masked Finfoot Heliopais personata (Gray 1849) in Selangor Darul Ehsan, Peninsular Malaysia. BirdingASIA: 69-71.

Verma, A.; Mathur, V. B. 2006. First record of Masked Finfoot Heliopais personata from Kama, Bharatpur District, north-west India. BirdingASIA: 72.

Citation: BirdLife International 2012. Heliopais personatus. The IUCN Red List of Threatened Species. Version 2015.2. <>. Downloaded on 04 September 2015.
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