Archived 2021 topic: Rarotonga Fruit-dove (Ptilinopus rarotongensis): Revise global status?

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6 Responses to Archived 2021 topic: Rarotonga Fruit-dove (Ptilinopus rarotongensis): Revise global status?

  1. Mark O'Brien says:

    If the species range map is to be believed, then the species did indeed go extinct on Mauke, while HBW also reported it, historically, from Aitutaki and Mangaia (fossil record). So, the chances of extirpation from an island the size of Atiu is not unrealistic – we don’t know what caused those extirpations. So, I would urge caution on that front – there is evidence that bullets 6 and/or 7 have happened in the past..

  2. Alice Cibois says:

    Two populations have already disappeared in the past, on Mangaia and Mauke (see Thibault, J.-C. and Cibois, A. 2017. Birds of Eastern Polynesia. A biogeographic Atlas., Barcelona, Lynx Edicions). Although the remaining populations seem stable, no evaluation has been made recently. Both Atiu and Rarotonga are relatively small islands, and the trends are unknown regarding the wooded areas where the fruit doves live. So the main risks, like possible habitat loss, introduction of competitors or diseases, have not decreased for this species. Therefore I would not recommend a category change for this species.

  3. The IUCN SSC Pigeon and Dove Specialist Group network have no additional information to offer but acknowledge the concerns expressed by other contributers and urge caution towards the proposed reassessment and changes in Red List status.

  4. 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

  5. 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.

    Although a cyclone may severely affect or even extirpate either of the two island populations, and may rapidly drive the species to Endangered status, we consider it unlikely that it would rapidly drive the species to Critically Endangered status (e.g. by causing a population reduction of >80% within a few years). As a result, the species qualifies as Near Threatened under Criterion D2, but not as Vulnerable. If future surveys indicate that the species’s population size is declining, the species’s Red List Category will be re-evaluated.

    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.

  6. Red List Team (BirdLife International) says:

    Recommended categorisation to be put forward to IUCN

    The final categorisation for this species has not changed. Rarotonga Fruit-dove is recommended to be listed as Near Threatened, approaching the thresholds for listing as threatened under Criteria B1a+2a; D1+2.

    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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