Archived 2021 topic: Green Imperial-pigeon (Ducula aenea): Revise global status?

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14 Responses to Archived 2021 topic: Green Imperial-pigeon (Ducula aenea): Revise global status?

  1. The Species has been declined drastically due to large-scale habitat degradation and illegal hunting in the countryside adjacent to the reserve forest and protected areas. The tree species they frequently forage and roosts are extensively felled in the reserve forest in recent times as it was seen. Both distribution sites and population size have declined in recent times since the last decade.

  2. Bosco Chan says:

    The species is rarely reported in its China range despite the much improved survey/birdwatching efforts in recent years, even in suitable lowland sites where hornbills manage to survive. So an uplist seems justified.

  3. Paul Thompson says:

    In Bangladesh it is a rare resident restricted to isolated small protected areas in NE and to degraded and declining hill forests in SE. Mapped range is incorrect – not found in Sundarbans or south-central area. No population/survey data to determine a trend, but rarely recorded during forest surveys; probably a small but stable population in NE and declining in line with habitat decline in SE.

  4. Population in Java is clearly declining especially in non-protected habitat. 43 confirmed observation submitted through Burungnesia (2021) from 2016-2021 mainly came from protected areas, especially Baluran National Park (23 observation), Alas Purwo National Park (4 observation), Ujung Kulon NP (3 observation) and Kondang Merak Protected Forest (2 observation). The other 10 observation came from outside of protected areas, with only 1-2 individual for each sightings.

    Moreover during the BigMonth on January 2020, on which hundreds of birdwatcher visited non-protected areas and managed to cover more than 75% of landmass in Java, only 1 observation were reported from Gresik, East Java (22 January 2020) and Bangkalan, Madura (13 January 2020, both reported by Agus Satriyono) (Burungnesia, 2021)

    While no population data exist to estimate the trend, this fact alone should illustrate the decline in this island.

  5. Tshering Tobgay says:

    The species sighting in Bhutan are limited to southern Bhutan and it is not a common species to sight in Bhutan. Most of the species are recorded in Bhutan only during the winter season in Asia.
    It is due to the lack of data from the past, the population trend prediction in Bhutan is difficult.

  6. Ingkayut Sa-ar says:

    The species can still be found on several islands off the west coast of Peninsular Thailand, but it is rarely seen on the mainland. In the last two decades, there have only been two reliable mainland records: Satun in 2015 and Surat Thani province in 2017.

    It’s possible that the species was once also common on the mainland of Peninsular Thailand before the low-lying habitat was extensively destroyed.

  7. Praveen J says:

    In India, there are three populations – (1) the Western Ghats including south Eastern Ghats, (2) the Central/North Eastern ghats + CE India and (3) E India (incl. NE Hill states) – all populations narrowly connected.

    It is interesting the decline of this species is connected to rate of forest decline. In Western Ghats, the species avoids all dense and wet forests. Ducula [badia] cuprea replaces this species in all wet forests and co-occur rarely. Green Imperial Pigeon is found in forest edges, well-wooded villages in the midlands, as well as riparian tracts in dry deciduous forests – in summary, the species is tolerant to moderate levels of disturbances. Kerala Bird Atlas map gives a good idea of how it avoids all wet/dense forests.
    https://drive.google.com/file/d/15CZ1x-cJ2K8mP7wpSt99sjMeJgMzoNnJ/view

    Hunting of all forest species in southern India is several times lesser than other parts like NE Hill states and hence that is not a threat to the south Indian population.

    The state of India’s birds 2020 could not find any trends with confidence
    https://www.stateofindiasbirds.in/species/gripig1/

    Hence, there is no direct or indirect evidence implicating a decline in its population in the Western Ghats and south eastern Ghats

  8. Simon Mahood says:

    Still widespread in Cambodia and fairly common, although given the level of monitoring/observer effort here I don’t think that a NT rate of decline would have been noticed. Trends in other countries are evidently more obvious!

  9. Anwaruddin Choudhury says:

    It is still common in NE India. Hunting is on a slightly reduced scale in NE India but habitat loss has taken its toll. I think it is fine to upgrade.

  10. Abidur Rahman says:

    This species is not uncommon in NE India. Especially in the lowlands of NE India such as Assam, Arunachal, Meghalaya, Mizoram, and Tripura. Moreover, in the frontiers of Indo-Bhutan areas commonly seen species. There’s no drastic decline of this species has been noticed in these areas in the last decade.

  11. No new information on this species have been provided from within the IUCN SSC Pigeon and Dove Specialist Group network and we are therefore supportive towards the proposed reassessment and changes in Red List status.

  12. Red List Team (BirdLife International) says:

    Many thanks to everyone who has contributed to this discussion. We greatly appreciate the time and effort invested by so many people in commenting. The window for consultation is now closed. We will analyse and interpret the new information and post a preliminary decision on this species’s Red List status on this page in early July.

    Thank you once again,
    BirdLife Red List Team

  13. Red List Team (BirdLife International) says:

    Preliminary proposal

    Based on available information, our preliminary proposal for the 2021 Red List would be to adopt the proposed classifications outlined in the initial forum discussion.

    There is now a period for further comments until the final deadline in mid-July, after which the recommended categorisations will be put forward to IUCN.

    The final 2021 Red List categories will be published on the BirdLife and IUCN websites in December 2021, following further checking of information relevant to the assessments by both BirdLife and IUCN.

  14. Red List Team (BirdLife International) says:

    Recommended categorisation to be put forward to IUCN

    The final categorisation for this species has not changed. Green Imperial-pigeon is recommended to be listed as Near Threatened, approaching the threshold for listing as threatened under Criteria A3cd+4cd.

    Many thanks for everyone who contributed to the 2021 GTB Forum process. The final 2021 Red List categories will be published on the BirdLife and IUCN websites in December 2021, following further checking of information relevant to the assessments by both BirdLife and IUCN.

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