6 thoughts on “Streak-breasted Bulbul (Hypsipetes siquijorensis)”
The 3 species in this group are allopatric and differ in plumage and especially vocalisations. For the Philippines the taxonomy should follow Mcgregor unless convincing arguments are made for lumping.
(1) It appears to be widespread on Tablas, at least along the central forested spine – see eBird – the map and perhaps the AOO should be updated
(2) On Tablas, I recorded similar densities to Sarenas & Meren (e.g. 42 in 11h / 9 km: https://ebird.org/checklist/S162428130) – I suggest that 500-2500 individuals is probably too low and appropriate only if labelled as ‘precautionary’
Many thanks to everyone who has contributed to this discussion. We greatly appreciate the time and effort invested in commenting. The window for consultation is now closed and we are unable to accept any more comments until 2 February 2026. We will now analyse and interpret the information, and we will post a preliminary decision on this species’ Red List category on this page on 2 February 2026, when discussions will re-open.
As noted in the opening sentence of the rationale, the species must be assessed as the taxonomic concept currently recognised (i.e. with the three subspecies lumped). We encourage people to submit taxonomic proposals to AviList (avilist.org) to recommend taxonomic changes.
We thank G. Dutson for their comment. In response, we will increase the upper bound of the Tablas population, so that we now suspect it to number 500-5,000, pending the availability of better data.
Based on available information, our preliminary proposal for the 2026 Red List would be to adopt the proposed classification outlined in the initial forum discussion.
There is now a period for further comments until the final deadline on 8 February 2026, after which the recommended categorisations will be put forward to IUCN.
The final 2026 Red List categories will be published on the BirdLife and IUCN websites later this year, 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 in commenting. The window for consultation is now closed and we are unable to accept any more comments. We will analyse and interpret the information, and a final decision on this species’ Red List category will be posted on this page on 16 February 2026.
Recommended categorisation to be put forward to IUCN
The final categorisation for this species has not changed. Streak-breasted Bulbul is recommended to be listed as Near Threatened, approaching thresholds under Criterion B2b(iii).
Many thanks to everyone who contributed to the 2026.1 GTB Forum process. The final Red List categories will be published on the BirdLife and IUCN websites later this year, following further checking of information relevant to the assessments by both BirdLife and IUCN.
The 3 species in this group are allopatric and differ in plumage and especially vocalisations. For the Philippines the taxonomy should follow Mcgregor unless convincing arguments are made for lumping.
(1) It appears to be widespread on Tablas, at least along the central forested spine – see eBird – the map and perhaps the AOO should be updated
(2) On Tablas, I recorded similar densities to Sarenas & Meren (e.g. 42 in 11h / 9 km: https://ebird.org/checklist/S162428130) – I suggest that 500-2500 individuals is probably too low and appropriate only if labelled as ‘precautionary’
Many thanks to everyone who has contributed to this discussion. We greatly appreciate the time and effort invested in commenting. The window for consultation is now closed and we are unable to accept any more comments until 2 February 2026. We will now analyse and interpret the information, and we will post a preliminary decision on this species’ Red List category on this page on 2 February 2026, when discussions will re-open.
Preliminary proposal
As noted in the opening sentence of the rationale, the species must be assessed as the taxonomic concept currently recognised (i.e. with the three subspecies lumped). We encourage people to submit taxonomic proposals to AviList (avilist.org) to recommend taxonomic changes.
We thank G. Dutson for their comment. In response, we will increase the upper bound of the Tablas population, so that we now suspect it to number 500-5,000, pending the availability of better data.
Based on available information, our preliminary proposal for the 2026 Red List would be to adopt the proposed classification outlined in the initial forum discussion.
There is now a period for further comments until the final deadline on 8 February 2026, after which the recommended categorisations will be put forward to IUCN.
The final 2026 Red List categories will be published on the BirdLife and IUCN websites later this year, 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 in commenting. The window for consultation is now closed and we are unable to accept any more comments. We will analyse and interpret the information, and a final decision on this species’ Red List category will be posted on this page on 16 February 2026.
Recommended categorisation to be put forward to IUCN
The final categorisation for this species has not changed. Streak-breasted Bulbul is recommended to be listed as Near Threatened, approaching thresholds under Criterion B2b(iii).
Many thanks to everyone who contributed to the 2026.1 GTB Forum process. The final Red List categories will be published on the BirdLife and IUCN websites later this year, following further checking of information relevant to the assessments by both BirdLife and IUCN.