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 |
---|---|---|
- | B1ab(ii,iii,iv,v) | A2c; B1ab(ii,iii,iv,v)+2ab(ii,iii,iv,v); C2a(i); D1 |
Year | Category | Criteria |
---|---|---|
2020 | Endangered | B1ab(ii,iii,iv,v) |
2017 | Near Threatened | B1ab(i,ii,iii,v)+2ab(i,ii,iii,v) |
2016 | Near Threatened | B1ab(i,ii,iii,v) |
2012 | Near Threatened | B1ab(i,ii,iii,v) |
2008 | Near Threatened | B1a+b(i,ii,iii,v) |
2005 | Near Threatened | |
2004 | Vulnerable | |
2000 | Vulnerable | |
1996 | Vulnerable | |
1994 | Vulnerable | |
1988 | Not Recognised |
Migratory status | not a migrant | Forest dependency | medium |
Land-mass type |
continent |
Average mass | - |
Estimate | Data quality | |
---|---|---|
Extent of Occurrence (breeding/resident) | 4,400 km2 | medium |
Area of Occupancy (breeding/resident) | 1,500 km2 | |
Number of locations | 5 | - |
Severely fragmented? | no | - |
Estimate | Data quality | Derivation | Year of estimate | |
---|---|---|---|---|
Population size | 400-1300 mature individuals | medium | estimated | 2020 |
Population trend | decreasing | - | inferred | - |
Rate of change over the past 10 years/3 generations (longer of the two periods) | 38-47% | - | - | - |
Generation length | 2.6 years | - | - | - |
Number of subpopulations | 2 | - | - | - |
Percentage of mature individuals in largest subpopulation | 1-89% | - | - | - |
Population justification: Surveys in 2007-2008 estimated a population size of 600-700 pairs on Namuli, based on density estimates of 5 pairs/10 ha over an area of 1200-1400 ha (Dowsett-Lemaire, 2010). Due to deforestation, the remaining suitable habitat on Namuli is now estimated to be 300-500 ha (Dowsett-Lemaire pers. comm. 2020), which would equate to roughly 150-250 pairs, or 300-500 mature individuals, based on previous population densities. Assuming the population densities are the same in the 800 ha of suitable habitat on Mabu, this would equate to an additional 400 pairs, or 800 mature individuals, and an overall total of 1100-1300 mature individuals. However, the forest on Mabu is believed to be sub-optimal for this species, and Dowsett-Lemaire (2010) found vastly different population densities at the two sites, with only an estimated few dozen pairs over the whole 800 ha at Mabu. If this is closer to the true population density on Mabu, the population size on Mabu may actually be <100 mature individuals. The population estimate is therefore placed at 400-1300 mature individuals, and due to the sub-optimal habitat quality at Mabu, it is likely that the current population is nearer the lower estimate.
Trend justification: The population is inferred to be experiencing high rates of decline due to substantial habitat loss from deforestation for potato cash crop production (Dowsett-Lemaire, 2010; Timberlake, 2017).
Country/Territory | Presence | Origin | Resident | Breeding visitor | Non-breeding visitor | Passage migrant |
---|---|---|---|---|---|---|
Mozambique | extant | native | yes |
Country/Territory | IBA Name |
---|---|
Mozambique | Mount Mabu |
Mozambique | Mount Namuli |
Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
---|---|---|---|
Artificial/Terrestrial | Subtropical/Tropical Heavily Degraded Former Forest | suitable | resident |
Forest | Subtropical/Tropical Moist Montane | major | resident |
Altitude | 1270 - 2000 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%) | Rapid Declines | Medium Impact: 6 | ||||||
|
|||||||||
Biological resource use | Logging & wood harvesting - Unintentional effects: (large scale) [harvest] | Timing | Scope | Severity | Impact | ||||
Future | Minority (<50%) | Rapid Declines | Low Impact: 4 | ||||||
|
|||||||||
Climate change & severe weather | Habitat shifting & alteration | Timing | Scope | Severity | Impact | ||||
Future | Whole (>90%) | Unknown | Unknown | ||||||
|
|||||||||
Transportation & service corridors | Roads & railroads | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | Negligible declines | Low Impact: 4 | ||||||
|
Recommended citation
BirdLife International (2024) Species factsheet: Namuli Apalis Apalis lynesi. Downloaded from
https://datazone.birdlife.org/species/factsheet/namuli-apalis-apalis-lynesi 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.