5 thoughts on “Annobon White-eye (Zosterops griseovirescens): Revise global status?”
There is no basis for the population estimate provided in the current assessment.
Furthermore, the species has an AOO & EOO of 32 sqkm, when it occurs on an island that is only 17 sqkm. This requires careful consideration, namely since it is unlikely that species occurs across the whole island in very high densities. A minimum of 4700 individuals would imply a density of 3 individuals/ha across the whole island, including non-forested areas.
As a precautionary measure, I suggest the species is kept as VU, under criteria D2 – The island is less than 20 sqkm, thus I don’t see why the AOO should be larger than that, and the species is probably best assumed to occur in a single location.
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 and we are unable to accept any more comments until 21 February 2022. We will now analyse and interpret the new information, and we will post a preliminary decision on this species’s Red List status on this page on 21 February 2022, when discussions will re-open.
Based on available information, our preliminary proposal for the 2022.1 Red List would be to adopt the proposed classifications outlined in the initial forum discussion. Following the comment(s) above, the population size has been revised to ‘Unknown’ to reflect the uncertainty.
The EOO and AOO as indicated in the original forum topic is correct. Following IUCN Guidelines, EOO values are calculated drawing a minimum convex polygon around the species’s range, while AOO values are calculated from a 2 x 2 km grid over the mapped range. In many instances, especially islands with complex shapes, the values generated can therefore be larger (occasionally much) than the total area of the island itself.
The assessment of Annobon White-eye remains unaffected by these edits on the basis that there are no known threats, which prevents the use of locations* or Criterion D2, and the population is suspected to be stable.
There is now a period for further comments until the final deadline on 27 February 2022, after which the recommended categorisations will be put forward to IUCN.
The final 2022.1 Red List categories will be published on the BirdLife and IUCN websites in July 2022, following further checking of information relevant to the assessments by both BirdLife and IUCN.
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 and we are unable to accept any more comments. We will analyse and interpret the new information, and we will post a final decision on this species’ Red List status on this page on 7 March 2022.
Recommended categorisation to be put forward to IUCN
The final categorisation for this species has not changed. Annobon White-eye is recommended to be listed as Least Concern.
Many thanks for everyone who contributed to the 2022.1 GTB Forum process. The final 2022.1 Red List categories will be published on the BirdLife and IUCN websites in July 2022, following further checking of information relevant to the assessments by both BirdLife and IUCN.
There is no basis for the population estimate provided in the current assessment.
Furthermore, the species has an AOO & EOO of 32 sqkm, when it occurs on an island that is only 17 sqkm. This requires careful consideration, namely since it is unlikely that species occurs across the whole island in very high densities. A minimum of 4700 individuals would imply a density of 3 individuals/ha across the whole island, including non-forested areas.
As a precautionary measure, I suggest the species is kept as VU, under criteria D2 – The island is less than 20 sqkm, thus I don’t see why the AOO should be larger than that, and the species is probably best assumed to occur in a single location.
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 and we are unable to accept any more comments until 21 February 2022. We will now analyse and interpret the new information, and we will post a preliminary decision on this species’s Red List status on this page on 21 February 2022, when discussions will re-open.
Preliminary proposal
Based on available information, our preliminary proposal for the 2022.1 Red List would be to adopt the proposed classifications outlined in the initial forum discussion. Following the comment(s) above, the population size has been revised to ‘Unknown’ to reflect the uncertainty.
The EOO and AOO as indicated in the original forum topic is correct. Following IUCN Guidelines, EOO values are calculated drawing a minimum convex polygon around the species’s range, while AOO values are calculated from a 2 x 2 km grid over the mapped range. In many instances, especially islands with complex shapes, the values generated can therefore be larger (occasionally much) than the total area of the island itself.
The assessment of Annobon White-eye remains unaffected by these edits on the basis that there are no known threats, which prevents the use of locations* or Criterion D2, and the population is suspected to be stable.
There is now a period for further comments until the final deadline on 27 February 2022, after which the recommended categorisations will be put forward to IUCN.
The final 2022.1 Red List categories will be published on the BirdLife and IUCN websites in July 2022, following further checking of information relevant to the assessments by both BirdLife and IUCN.
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 and we are unable to accept any more comments. We will analyse and interpret the new information, and we will post a final decision on this species’ Red List status on this page on 7 March 2022.
Recommended categorisation to be put forward to IUCN
The final categorisation for this species has not changed. Annobon White-eye is recommended to be listed as Least Concern.
Many thanks for everyone who contributed to the 2022.1 GTB Forum process. The final 2022.1 Red List categories will be published on the BirdLife and IUCN websites in July 2022, following further checking of information relevant to the assessments by both BirdLife and IUCN.