Current view: Data table and detailed info
Taxonomic note
Hypsipetes parvirostris and H. moheliensis (del Hoyo and Collar 2016) were previously lumped as H. parvirostris following Dowsett & Forbes-Watson (1993) and Sibley & Monroe (1990, 1993).
Taxonomic source(s)
del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A., Fishpool, L.D.C., Boesman, P. and Kirwan, G.M. 2016. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Volume 2: Passerines. Lynx Edicions and BirdLife International, Barcelona, Spain and Cambridge, UK.
IUCN Red List criteria met and history
Red List criteria met
Red List history
Population justification: This species is reasonably common (with encounter rates of 25 birds/hr [Safford 2013]), although less common above 1,000m (Louette 2004). Based on descriptions of abundance, and assuming only a proportion of its restricted range is inhabited, this species is not thought to number more than 10,000 mature individuals. Therefore, it is tentatively placed in the range of 2,500-9,999 mature individuals.
Trend justification: The population is suspected to be slowly declining owing to on-going habitat loss and degradation. Deforestation rates have been low over the past three generations, amounting to 4% (Global Forest Watch 2021, using Hansen et al. [2013] data and methods disclosed therein). Given that the species can tolerate degraded areas and clearings, any population decline is likely to be slower than this, therefore the decline is not expected to exceed 5% over three generations.
Country/territory distribution
Important Bird and Biodiversity Areas (IBA)
Recommended citation
BirdLife International (2025) Species factsheet: Grande Comore Bulbul Hypsipetes parvirostris. Downloaded from
https://datazone.birdlife.org/species/factsheet/grande-comore-bulbul-hypsipetes-parvirostris on 01/02/2025.
Recommended citation for factsheets for more than one species: BirdLife International (2025) IUCN Red List for birds. Downloaded from
https://datazone.birdlife.org/species/search on 01/02/2025.