The species has been found back in Tikehau (2021), but is now restricted to a single, tiny and isolated islet there, the only one not yet colonized by black rat, whereas before it was observed on 2-3 islets within this island . There are only 8 islands in French Polynesia, the visit/census of its more remote populations is spaced in time (2002 for the Ziembicki work). The species has experienced a high range restriction in a relatively recent past (due to black rat) :7-9 islands of the Society Archipelago ; at least 5-7 islands of the Tuamotu Archipelago
Biosecurity is not well established in the Tuamotu Archipelago, as in the Society atoll, none of its present locations are unihabited, copra exploitation is present in most of its islands, so the risk of rat invasion is still high in all the locations. In some location, there is only one motu containing the last population, or the fragmentation of the motu is not preventing the rapid extension of black rat all over the island. Have you pushed your analyse to consider this point ? I believe you are too much optimistic with the number of small motus in each location: they may be still present but unable to reproduce there because of black rat. We are ignoring the situation of the species (ie if it is still present) in several of the remaining island (not visited since a while – nearly 20 years) and all it remaining viable sites in Rangiroa are exploited for coprah, so are suceptible to be rapidly contaminated by black rat already present . We have also fire clearing of breeding site in Rangiroa, even if they are still able to recover in the absence of Black rat. I suggest refine the number of location more precisely than ‘7-80, or 20-30’ before to take the decision to decrease its classification
I fully agree with Caroline Blanvillain’s comment. The Black Rat is still a major threat for this species. Its distribution is more and more fragmented, limited to small rat-free islets. I would not either recommend a category change for this species.
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
Based on available information, our preliminary proposal for the 2021 Red List would be to list Blue Lorikeet as Vulnerable under Criterion B2ab(ii,iii,iv,v) .
Following further consideration of the additional information provided, it is considered likely that it would take only 1-2 introduction events for Black Rats to colonise each island or atoll within the range of the Blue Lorikeet. The Blue Lorikeet is generally absent from islands colonised by the Black Rat, so each island subpopulation is likely to be severely affected by an introduction event. Cyclones may also rapidly affect the entire population of one or more islands or atolls within the species’s range. The number of locations is therefore placed in the band 6-10, and the species thus qualifies as Vulnerable under Criterion B2.
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.
Recommended categorisation to be put forward to IUCN
The final categorisation for this species has not changed. Blue Lorikeet is recommended to be listed as Vulnerable under Criterion B2ab(ii,iii,iv,v).
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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Contact the BirdLife Red List Team under redlistteam [at] birdlife [dot] org.