• Summary
• Text account
• Data table and detailed info
• Distribution map
• Reference and further resources

Taxonomic source(s)
del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A. and Fishpool, L.D.C. 2014. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Volume 1: Non-passerines. Lynx Edicions BirdLife International, Barcelona, Spain and Cambridge, UK.

Red List criteria met

Critically Endangered	Endangered	Vulnerable
-	-	-

Red List history

Year	Category	Criteria
2022	Near Threatened	C2a(ii)
2016	Vulnerable	C2a(i)
2012	Vulnerable	C2a(i)
2008	Vulnerable	C2a(i)
2004	Vulnerable
2000	Vulnerable
1996	Vulnerable
1994	Vulnerable
1988	Threatened

Migratory status	not a migrant	Forest dependency	high
Land-mass type	continent	Average mass	-

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	69,700 km2	medium
Number of locations	4	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	2500-9999 mature individuals	poor	suspected	2000
Population trend	decreasing	medium	suspected	2016-2026
Rate of change over the past 10 years/3 generations (longer of the two periods)	10-19%	-	-	-
Rate of change over the future 10 years/3 generations (longer of the two periods)	10-19%	-	-	-
Rate of change over the past & future 10 years/3 generations (longer of the two periods)	10-19%	-	-	-
Generation length	3.05 years	-	-	-
Number of subpopulations	1-4,1	-	-	-
Percentage of mature individuals in largest subpopulation	100%	-	-	-

Population justification: The species is only known from 3-5 specimens and a handful of field records, most from Nyungwe where it is clearly very rare (F. Dowsett-Lemaire in litt. 2016). However, the specimens are from poorly studied sites that retain suitable habitat and are widely separated with large areas of apparently suitable habitat occurring in between. As a nocturnal species it may have been under-recorded by past ornithological surveys, and it may be fairly common in parts of Itombwe (T. Butynski in litt. 1999). Based on known records and the likely extent of suitable habitat within the inferred range, the population is provisionally suspected to number 2,500-9,999 mature individuals, which is consistent with recorded population density estimates for congeners or close relatives with a similar body size. This is equivalent to 3,750-14,999 individuals, rounded here to 3,500-15,000 individuals. The population may however be smaller, given the apparent very low densities in Nyungwe Forest in particular.

Trend justification: The population is suspected to be declining in line with the clearance and degradation of forest within the species's range. Tree cover loss within the range is currently estimated to be 10-16% across ten years (Global Forest Watch 2021, using Hansen et al. [2013] data and methods disclosed therein). This rate is expected to continue in the absence of action to mitigate current drivers of forest loss. This is considered to be a highly forest dependent species and therefore assuming that population declines are roughly equivalent to the rate of forest loss, the species may be declining at a rate of up to 20% over ten years.

Country/Territory	Presence	Origin	Resident	Breeding visitor	Non-breeding visitor	Passage migrant
Congo, The Democratic Republic of the	extant	native	yes
Rwanda	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
Rwanda	Nyungwe National Park

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Forest	Subtropical/Tropical Moist Montane	major	resident
Altitude	1100 - 2500 m	Occasional altitudinal limits

Threat (level 1)	Threat (level 2)	Impact and Stresses
Agriculture & aquaculture	Annual & perennial non-timber crops - Small-holder farming	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture	Livestock farming & ranching - Small-holder grazing, ranching or farming	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Ecosystem degradation, Ecosystem conversion
Biological resource use	Hunting & trapping terrestrial animals - Unintentional effects (species is not the target)	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Indirect ecosystem effects, Ecosystem degradation
Biological resource use	Logging & wood harvesting - Unintentional effects: (subsistence/small scale) [harvest]	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Ecosystem degradation
Energy production & mining	Mining & quarrying	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Ecosystem degradation, Ecosystem conversion
Residential & commercial development	Housing & urban areas	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Ecosystem conversion

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Recommended citation
BirdLife International (2024) Species factsheet: Albertine Owlet Glaucidium albertinum. Downloaded from https://datazone.birdlife.org/species/factsheet/albertine-owlet-glaucidium-albertinum on 23/12/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from https://datazone.birdlife.org/species/search on 23/12/2024.