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.
SACC. 2005 and updates. A classification of the bird species of South America. Available at: https://www.museum.lsu.edu/~Remsen/SACCBaseline.htm.
Critically Endangered | Endangered | Vulnerable |
---|---|---|
- | - | D1 |
Year | Category | Criteria |
---|---|---|
2024 | Vulnerable | D1 |
2016 | Vulnerable | D1 |
2012 | Vulnerable | D1 |
2008 | Vulnerable | D1 |
2004 | Vulnerable | |
2000 | Vulnerable | |
1994 | Lower Risk/Least Concern | |
1988 | Lower Risk/Least Concern |
Migratory status | not a migrant | Forest dependency | low |
Land-mass type | Average mass | 33 g |
Estimate | Data quality | |
---|---|---|
Extent of Occurrence (breeding/resident) | 44 km2 | medium |
Area of Occupancy (breeding/resident) | 44 km2 | |
Severely fragmented? | no | - |
Estimate | Data quality | Derivation | Year of estimate | |
---|---|---|---|---|
Population size | 700-1000 mature individuals | medium | estimated | 2016 |
Population trend | stable | poor | suspected | - |
Generation length | 3.49 years | - | - | - |
Number of subpopulations | 1 | - | - | - |
Percentage of mature individuals in largest subpopulation | 100% | - | - | - |
Population justification: The species is described as the least common of the three resident landbirds on Fernando de Noronha (Hosner 2020, see also eBird 2023). Point counts along almost the entire trail system in 2009 found 354 individuals (Mestre et al. 2016). Based on these surveys it is assumed that the total population numbers at least 1,000 individuals (Mestre et al. 2016, ICMBio 2018, L. Mestre in litt. 2020). Consequently, a very preliminary estimate is of 700-c.1,000 mature individuals.
Trend justification: It is hypothesised that the species used to be more widespread prior to anthropogenic changes in habitat (Olson 1994, Mestre et al. 2016). However, as all large trees on the island were cut with human colonisation several centuries ago, the species seems to show considerable resilience to habitat conversion (Olson 1994). While there are indications that the population had declined in the past this reduction appears to be historical, and the population may currently well be stable.
Country/Territory | Presence | Origin | Resident | Breeding visitor | Non-breeding visitor | Passage migrant |
---|---|---|---|---|---|---|
Brazil | extant | native | yes |
Country/Territory | IBA Name |
---|---|
Brazil | Arquipélago de Fernando de Noronha |
Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
---|---|---|---|
Artificial/Terrestrial | Rural Gardens | suitable | resident |
Forest | Subtropical/Tropical Dry | major | resident |
Forest | Subtropical/Tropical Moist Lowland | suitable | resident |
Shrubland | Subtropical/Tropical Dry | suitable | resident |
Shrubland | Subtropical/Tropical Moist | suitable | resident |
Altitude | 0 - 110 m | Occasional altitudinal limits |
Threat (level 1) | Threat (level 2) | Impact and Stresses | |||||||
---|---|---|---|---|---|---|---|---|---|
Biological resource use | Logging & wood harvesting - Unintentional effects: (subsistence/small scale) [harvest] | Timing | Scope | Severity | Impact | ||||
Past, Unlikely to Return | Whole (>90%) | Slow, Significant Declines | Past Impact | ||||||
|
|||||||||
Invasive and other problematic species, genes & diseases | Invasive non-native/alien species/diseases - Felis catus | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | Negligible declines | Low Impact: 4 | ||||||
|
|||||||||
Invasive and other problematic species, genes & diseases | Invasive non-native/alien species/diseases - Named species | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | Negligible declines | Low Impact: 4 | ||||||
|
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Residential & commercial development | Tourism & recreation areas | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | Negligible declines | Low Impact: 4 | ||||||
|
Recommended citation
BirdLife International (2024) Species factsheet: Noronha Elaenia Elaenia ridleyana. Downloaded from
https://datazone.birdlife.org/species/factsheet/noronha-elaenia-elaenia-ridleyana 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.