Data Zone
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.
| Critically Endangered | Endangered | Vulnerable |
|---|---|---|
| - | - | C2a(i) |
| 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 | ||||||
|
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| 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 | ||||||
|
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| 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 | ||||||
|
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| Climate change & severe weather | Habitat shifting & alteration | Timing | Scope | Severity | Impact | ||||
| Ongoing | Whole (>90%) | Slow, Significant Declines | Medium Impact: 7 | ||||||
|
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| Natural system modifications | Fire & fire suppression - Trend Unknown/Unrecorded | Timing | Scope | Severity | Impact | ||||
| Ongoing | Minority (<50%) | Slow, Significant Declines | Low Impact: 5 | ||||||
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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 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.