Data Zone
Justification of Red List category
This species has an extremely large range, and hence does not approach the thresholds for Vulnerable under the range size criterion (Extent of Occurrence under 20,000 km² combined with a declining or fluctuating range size, habitat extent/quality, or population size and a small number of locations or severe fragmentation). The population size has not been quantified, but it is not believed to approach the thresholds for Vulnerable under the population size criterion (under 10,000 mature individuals with a continuing decline estimated to be over 10% in ten years or three generations, or with a specified population structure). Despite the fact that the population trend appears to be decreasing, the decline is not believed to be sufficiently rapid to approach the thresholds for Vulnerable under the population trend criterion (over 30% decline over ten years or three generations). For these reasons the species is evaluated as Least Concern.
Population justification
The global population size has not been quantified, but the species is described as common to abundant (Feare and Craig 1998). This species is considered to have a medium dependency on forest habitat, and tree cover is estimated to have declined by 14% within its mapped range over the past three generations (Global Forest Watch 2022, using Hansen et al. [2013] data and methods disclosed therein). Therefore, as a precautionary measure, it is tentatively suspected that this loss of cover may have led to a decline of between 1-19% in the species' population size over the same time frame.
Trend justification
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This species occurs from east and north-east India east to southern China, and south through south-east Asia to Palawan (Philippines), Borneo and the Greater Sundas, including Enggano Island (Indonesia). There are also introduced populations in several places, including Puerto Rico (to USA). The introduced population on Christmas Island (to Australia) has died out.
This species occurs in moist or semi-evergreen forest in lowlands, hills and mountains. It is known for its ability to mimic noises including human speech.
This species is tolerant of some degree of habitat degradation. However,it has been heavily traded: from 1994-2003, over 170,000 wild-caught individuals were exported from range states (UNEP-WCMC CITES Trade Database, October 2005.). It is one of the most popular avian pets in Asia, due to its ability to mimic noises and human speech. Trade, acting in conjunction with habitat loss throughout the species' range, appears to have seriously impacted this species, with significant population declines due to trade noted in China, Indonesia, Peninsular Malaysia, Thailand (all major declines), the Philippines, and parts of India and Laos (Pilgrim et al. in prep.). In all of these cases, the major trade demand has been domestic, rather than international. As a result of concerns about international trade, this species was included in CITES Appendix III at the request of Thailand in 1992 and subsequently included in Appendix II in 1997 on the recommendation of the Netherlands and the Philippines.
Text account compilers
Rutherford, C.A.
Recommended citation
BirdLife International (2024) Species factsheet: Common Hill Myna Gracula religiosa. Downloaded from
https://datazone.birdlife.org/species/factsheet/common-hill-myna-gracula-religiosa on 20/12/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from
https://datazone.birdlife.org/species/search on 20/12/2024.