Archived 2018 topic: Helmet Vanga (Euryceros prevostii): uplist from Vulnerable to Endangered?

This discussion was first published as part of the 2016 Red List update. At the time a decision regarding its status was pended, but to enable potential reassessment of the species as part of the 2018 Red List update this post was kept open. A decision has now been made and this topic is now closed.

BirdLife species factsheet for Helmet Vanga: http://www.birdlife.org/datazone/species/factsheet/22708058

This species is known from the lowland rainforest of north-eastern Madagascar, where it is uncommon and patchily distributed. It is currently classed as Vulnerable because of suspected continuing declines in its small range due to the conversion of its forest habitat.

Recent modelling analyses investigating the possible impact of climate change have suggested that this species’s ecological niche could nearly disappear over the 50 year period between 2000 and 2050 (Andriamasimanana and Cameron 2013). Assuming a linear decrease, this would equate to a reduction in its ecological niche of c.63% over the next 3 generations for this species (21 years). Thus it would qualify to be uplisted to Endangered under criterion A3bc.

We welcome any comments on this proposed uplisting.

References

Andriamasimanana, R. H.; Cameron, A. 2013. Predicting the impacts of climate change on the distribution of threatened forest-restricted birds in Madagascar. Ecol. & Evol. 3: 763-769.

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4 Responses to Archived 2018 topic: Helmet Vanga (Euryceros prevostii): uplist from Vulnerable to Endangered?

  1. James Westrip (BirdLife) says:

    Based on available information, our proposal for the 2016 Red List would be to pend the decision on this species and keep this discussion open until 2017, while leaving the current Red List category unchanged in the 2016 update.

    Final 2016 Red List categories will be published on the BirdLife and IUCN websites in early December, following further checking of information relevant to the assessments by both BirdLife and IUCN.

  2. Andy Symes (BirdLife) says:

    Preliminary proposals

    Based on available information, our proposal for the 2017 Red List would be to pend the decision on this species and keep this discussion open until 2018, while leaving the current Red List category unchanged in the 2017 update.

    There is now a period for further comments until the final deadline of 4 August, after which the recommended categorisations will be put forward to IUCN.

    Final 2017 Red List categories will be published on the BirdLife and IUCN websites in early December, following further checking of information relevant to the assessments by both BirdLife and IUCN.

  3. Marc Rabenandrasana says:

    In the field this species is classified as rare in addition of other forest dependent species such Red tailed Newtonia, Bernier’s Vanga and Serpent Eagle. Due to his habitat requirement as undisturbed rainforest. It is practically certain in low density in the known protected areas where they occurs with better protection. Thus assuming a global estimate by similar density in overall geographic distribution inside and outside of protected area will be an enormous error to overestimate their total population size. It is hard to believe that total population exeed 6000 breding individual. For example Helemt vanga record regularly at Marojejy, Anjanaharybe Sud, Masoala, Makira, Sihanaka orest (Zahamena park, and Andasibe area. It is possible to consider only the surface of real protected area where species occurs to predict their population size in the next 50 years, as the rhythm of forest clearance and habitat destruction is increasing rapidly outside of non-protected areas in Madagascar. This is reason why I think the 6000 -15000 an over estimate and advance the one third of the total number by Birdlife is close to the reality (less than 6000)
    And agreed the down list to the Endangered is really the reality to these species. The case of Vandam’s and Serpent Eagle are more crucial at the moment (Critical Endangered near extinction).
    Marc Rabenandrasana

  4. James Westrip (BirdLife) says:

    Preliminary proposals

    Based on available information, our preliminary proposal for the 2018 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.

    Please note that we will then only post final recommended categorisations on forum discussions where these differ from those in the initial proposal.
    The final 2018 Red List categories will be published on the BirdLife and IUCN websites in November, following further checking of information relevant to the assessments by both BirdLife and IUCN.

Comments are closed.