Data Zone
Justification of Red List category
This species has a large range, and hence does not approach the thresholds for Vulnerable under the range size criterion (Extent of Occurrence under 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 size has not been quantified, but it is not believed to approach the thresholds for Vulnerable under the population size criterion (under 10,000 mature individuals with a continuing decline estimated to be over 10% in ten years or three generations, or with a specified population structure). 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 (over 30% decline over ten years or three generations). For these reasons the species is evaluated as Least Concern.
Population justification
The global population size has not been quantified, but the species is described as locally common to abundant, although scarce in some parts of its range (del Hoyo et al. 2006). This species is considered to have a high dependency on forest habitat, and tree cover is estimated to have declined by 1.3% within its mapped range over the past 10 years (Global Forest Watch 2022, using Hansen et al. [2013] data and methods disclosed therein). It is therefore tentatively suspected that this rate of cover loss may have led to a decline of between 1-19% in the species' population size over the same time frame, with a best estimate of reduction being less than 5%.
Trend justification
.
This species has a large range extending from north-east Pakistan eastwards along the Himalayan chain to Bhutan and north-east India. It winters in the plains in the Calcutta area, Bihar, east Madhya Pradesh and the north Eastern Ghats.
The species is generally scarce but locally common in conifer, deciduous and warm temperate evergreen forest in lush undergrowth and bamboo, wintering in open forest (Rasmussen and Anderton 2005), breeding from 1,000-3,800 m but wintering as low as 250 m (Grimmett et al. 1998).
Text account compilers
Rutherford, C.A.
Recommended citation
BirdLife International (2024) Species factsheet: Green-crowned Warbler Phylloscopus burkii. Downloaded from
https://datazone.birdlife.org/species/factsheet/green-crowned-warbler-phylloscopus-burkii on 23/11/2024.
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 23/11/2024.