LC
Grey Sibia Heterophasia gracilis



Family: Leiotrichidae (Laughingthrushes and allies)

Authority: (McClelland, 1840)

Red List Category

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Justification of Red List category
Although this species may have a restricted range, it is not believed to 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). The population trend is not known, but the population is not believed to be decreasing sufficiently rapidly to approach the thresholds 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.

Population size: unknown

Population trend: unknown

Extent of occurrence (breeding/resident): 484,000 km2

Country endemic: no

Attributes
Realm - Indomalayan
Realm - Palearctic
IUCN System - Terrestrial

Recommended citation
BirdLife International (2024) Species factsheet: Grey Sibia Heterophasia gracilis. Downloaded from https://datazone.birdlife.org/species/factsheet/grey-sibia-heterophasia-gracilis on 21/12/2024.
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 21/12/2024.