Justification of Red List Category
This species has a very large range, and hence does not approach the thresholds for Vulnerable under the range size criterion (Extent of Occurrence <20,000 km2 combined with a declining or fluctuating range size, habitat extent/quality, or population size and a small number of locations or severe fragmentation). Despite the fact that the population trend appears to be decreasing, the decline is not believed to be sufficiently rapid to approach the thresholds for Vulnerable under the population trend criterion (>30% decline over ten years or three generations). The population size has not been quantified, but it is not believed to approach the thresholds for Vulnerable under the population size criterion (<10,000 mature individuals with a continuing decline estimated to be >10% in ten years or three generations, or with a specified population structure). For these reasons the species is evaluated as Least Concern.
The global population size has not been quantified, but this species is described as 'fairly common' (Stotz et al. 1996).
This species is suspected to be declining locally owing to ongoing habitat loss and habitat degradation caused by widespread gold mining in the past (del Hoyo et al. 1999).
This species has a large range in Venezuela, Colombia, Ecuador, Peru and Bolivia.
The species occurs from 900 up to 3000 m in a range of habitats including scrubland, clearings and gardens; it is sometimes found in grasslands and humid forest edge, but rarely in mature forest. Andean populations make seasonal altitudinal migrations (Schuchmann 1999).
Text account compilers
BirdLife International (2023) Species factsheet: Aglaiocercus kingii. Downloaded from http://datazone.birdlife.org/species/factsheet/long-tailed-sylph-aglaiocercus-kingii on 06/06/2023. Recommended citation for factsheets for more than one species: BirdLife International (2023) IUCN Red List for birds. Downloaded from http://datazone.birdlife.org on 06/06/2023.