Current view: Data table and detailed info
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.
IUCN Red List criteria met and history
Red List criteria met
Red List history
| Migratory status |
not a migrant |
Forest dependency |
medium |
| Land-mass type |
|
Average mass |
- |
Population justification: Estimated at 5,000 individuals during the mid-1980s (Brooke 1987), the population appears to have undergone a rapid decline since. While census data suggested a population of 4,200 individuals in 1994, it declined to 2,000 individuals in 2001 and to 1,550 individuals in 2009 (Hahn et al. 2011). Under the assumption that declines are continuing at this rate to the present day, the current population is thought to number 780 individuals, which equates to 520 mature individuals.
The population size is here placed in the band 250-1,550 mature individuals, with a best estimate of 520 mature individuals. This wide band reflects the uncertainty in the current estimate and the absence of recent population and trend data; the minimum population size is set as 250 mature individuals under the assumption that declines may have accelerated, while the maximum is set as 1,550 mature individuals under the assumption that the population has remained stable since 2009.
Trend justification: In the mid-1980s the population was estimated to be stable and secure at 5,000 individuals (Brooke 1987). Since then, the species however appears to have suffered from habitat loss through land-use change and the spread of invasive plants, as well as from predation by birds and introduced mammals (Hahn et al. 2011). While the population numbered around 4,200 individuals in 1994, it dropped to 2,000 individuals in 2001 and further to 1,550 in 2009 following an exponential decline (Hahn et al. 2011).
There is no recent data on the population trend. However, under the assumption that the population continued to decline exponentially to the present day, the rate of decline amounts to 39% over the past ten years.
There are currently considerable efforts being undertaken to restore native vegetation and to eradicate introduced predators (Dittrich 2019); this may prove beneficial to the species and it is therefore likely that the rate of decline will slow down in the near future. Precautionarily, it is however inferred that population declines will go on at a similar rate into the near future, here placed in the band 30-39% over ten years.
Country/territory distribution
Important Bird and Biodiversity Areas (IBA)
Recommended citation
BirdLife International (2024) Species factsheet: Juan Fernandez Tit-tyrant Anairetes fernandezianus. Downloaded from
https://datazone.birdlife.org/species/factsheet/juan-fernandez-tit-tyrant-anairetes-fernandezianus on 24/12/2024.
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 24/12/2024.
