Taxonomic note
Deleornis fraseri and D. axillaris (del Hoyo and Collar 2016) were previously lumped and placed in the genus Anthreptes as A. fraseri following Dowsett & Forbes-Watson (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.
Critically Endangered | Endangered | Vulnerable |
---|---|---|
- | - | - |
Year | Category | Criteria |
---|---|---|
2024 | Least Concern | |
2016 | Least Concern | |
2012 | Not Recognised | |
2008 | Not Recognised | |
2004 | Not Recognised | |
2000 | Not Recognised | |
1994 | Not Recognised | |
1988 | Not Recognised |
Migratory status | not a migrant | Forest dependency | medium |
Land-mass type | Average mass | - |
Estimate | Data quality | |
---|---|---|
Extent of Occurrence (breeding/resident) | 2,060,000 km2 | medium |
Severely fragmented? | no | - |
Estimate | Data quality | Derivation | Year of estimate | |
---|---|---|---|---|
Population size | unknown | - | - | - |
Population trend | decreasing | - | suspected | - |
Generation length | 2.9 years | - | - | - |
Population justification: The global population size has not been quantified. This species is considered to have a medium dependency on forest habitat, and tree cover is estimated to have declined by 8.8% within its mapped range over the past 10 years (Global Forest Watch 2022, using Hansen et al. [2013] data and methods disclosed therein). Therefore, as a precautionary measure, it is tentatively suspected that this loss of cover may have led to a decline of between 1-19% in the species' population size over the same time frame.
Trend justification: .
Country/Territory | Presence | Origin | Resident | Breeding visitor | Non-breeding visitor | Passage migrant |
---|---|---|---|---|---|---|
Burundi | extant | native | yes | |||
Congo | extant | native | yes | |||
Congo, The Democratic Republic of the | extant | native | yes | |||
Rwanda | extant | native | yes | |||
Tanzania | extant | native | yes | |||
Uganda | extant | native | yes |
Country/Territory | IBA Name |
---|---|
Congo, The Democratic Republic of the | Forests west of Lake Edward |
Congo, The Democratic Republic of the | Itombwe Mountains |
Congo, The Democratic Republic of the | Kahuzi-Biega National Park |
Congo, The Democratic Republic of the | Lomako - Yekokora |
Congo, The Democratic Republic of the | Maiko National Park |
Congo, The Democratic Republic of the | Mount Hoyo Reserve |
Congo, The Democratic Republic of the | Okapi Faunal Reserve |
Congo, The Democratic Republic of the | Salonga National Park |
Congo, The Democratic Republic of the | Virunga National Park |
Tanzania | Minziro Forest Reserve |
Uganda | Budongo Forest Reserve |
Uganda | Bwindi Impenetrable National Park |
Uganda | Kibale National Park |
Uganda | Mabira Forest Reserve |
Uganda | Queen Elizabeth National Park and Lake George |
Uganda | Semliki National Park |
Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
---|---|---|---|
Forest | Subtropical/Tropical Moist Lowland | major | resident |
Altitude | 500 - 1750 m | Occasional altitudinal limits |
Recommended citation
BirdLife International (2025) Species factsheet: Grey-headed Sunbird Deleornis axillaris. Downloaded from
https://datazone.birdlife.org/species/factsheet/grey-headed-sunbird-deleornis-axillaris on 10/01/2025.
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 10/01/2025.