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

Taxonomic note

Fraseria lendu (del Hoyo and Collar 2016) was previously listed as Muscicapa lendu.

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.

Red List criteria met

Critically Endangered	Endangered	Vulnerable
-	-	C2a(i)

Red List history

Year	Category	Criteria
2021	Vulnerable	C2a(i)
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)	319,000 km2	medium
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	2100-12700 mature individuals	poor	estimated	2021
Population trend	decreasing	medium	inferred	2018-2028
Rate of change over the past 10 years/3 generations (longer of the two periods)	1-10%	-	-	-
Rate of change over the future 10 years/3 generations (longer of the two periods)	20-29%	-	-	-
Rate of change over the past & future 10 years/3 generations (longer of the two periods)	20-29%	-	-	-
Generation length	3.02 years	-	-	-
Number of subpopulations	2-5	-	-	-
Percentage of mature individuals in largest subpopulation	1-89%	-	-	-

Population justification: Owing to its apparent rarity, taking the lower density quartiles of other flycatcher congeners, including the African Shrike-flycatcher, which also inhabits montane forests, of 1-6 individuals/sqkm (BirdLife Population Density Spreadsheet; Gatter 1997), and assuming that it inhabits 10% of the forest within its range (31,600 sqkm [Global Forest Watch 2021]), the population falls into the band of 2,107-12,640 mature individuals, rounded here to 2,100-12,700 mature individuals.

This species has two subspecies; Fraseria lendu lendu found in northeast DRC, southwest Uganda and west Kenya, and F. lendu itombwensis, found in eastern DRC. This species has not been recorded travelling long distances (Taylor 2020), and therefore, based on the distribution across its range (BirdLife International 2021), it may form up to 5 subpopulations. Therefore the number of subpopulations is estimated to be between 2-5. As such, based on a population size of 2,100-12,700 there may be 420-6,350 mature individuals in the largest subpopulation.

Trend justification: This species's population is inferred to be declining due to ongoing forest loss and degradation (Global Forest Watch 2021). During the years 2001-2019, this species's range lost 8.4% forest cover (Global Forest Watch 2021), equating to a 4.5% loss over 10 years. Assuming that the population declines at a similar rate, the overall rate of past decline is suspected to fall in the band of 1-10% Species distribution modelling by Ayebare et al. (2018) suggested that this species would lose 83% of its range between c.2018-2080 due to climate change. This would equate to a loss of 25% over 10 years. Therefore, the rate of future decline is suspected to fall in the band of 20-29%.

Country/Territory	Presence	Origin	Resident	Breeding visitor	Non-breeding visitor	Passage migrant
Congo, The Democratic Republic of the	extant	native	yes
Kenya	extant	native	yes
Rwanda	presence uncertain	native	yes
Uganda	extant	native	yes

Country/Territory	IBA Name
Congo, The Democratic Republic of the	Itombwe Mountains
Congo, The Democratic Republic of the	Lendu Plateau
Kenya	Kakamega forest
Kenya	North Nandi forest
Rwanda	Nyungwe National Park
Uganda	Bwindi Impenetrable National Park

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Forest	Subtropical/Tropical Moist Montane	major	resident
Altitude	1470 - 2150 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		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		Stresses Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture	Livestock farming & ranching - Small-holder grazing, ranching or farming	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		Stresses Ecosystem degradation, Ecosystem conversion
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
Climate change & severe weather	Habitat shifting & alteration	Timing		Scope		Severity		Impact
		Ongoing		Whole (>90%)		Slow, Significant Declines		Medium Impact: 7
		Stresses Ecosystem degradation, Ecosystem conversion
Natural system modifications	Fire & fire suppression - Trend Unknown/Unrecorded	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Ecosystem degradation, Ecosystem conversion

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Recommended citation
BirdLife International (2024) Species factsheet: Chapin's Flycatcher Fraseria lendu. Downloaded from https://datazone.birdlife.org/species/factsheet/chapins-flycatcher-fraseria-lendu on 22/11/2024.
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 22/11/2024.