Data Zone
Justification of Red List category
This species has a fairly 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). In the absence of acting threats, the population trend appears to be stable, thus the species does not approach the thresholds for Vulnerable under the population trend criterion (>30% decline over three generations). The population size is unknown, but is not suspected to be sufficiently small 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 justification
The population size has not been quantified but it is typically described as uncommon (Dickinson et al. 1991, Allen 2020). Compared to other species in its range, D. anthonyi appears to be encountered comparatively rarely (eBird 2022), although it may be commoner at elevations not readily accessible. Poulsen (1995) encountered only one individual of this species, despite extensive fieldwork March–May 1991 and March–May 1992, although most of their study sites were far below the typical elevation of this species and their one encounter (at 1,050 m) was probably at its lowest end. In total, c.5,000 km of forest lies in its range and this is unchanged since 2000 (per Global Forest Watch 2022). Although no density is available for this species (using those of congeners is not considered appropriate given its apparent scarcity), the total number is very unlikely to be smaller than 10,000 mature individuals.
Trend justification
In the absence of acting threats, the population trend is thought to be stable. D. anthonyi inhabits remote mossy forest in Luzon's highlands where forest cover loss has been minimal, equivalent to <1% between 2000 and 2021 (Global Forest Watch 2022, based on data from Hansen et al. [2013] and methods disclosed therein). While these data do not take degradation into account, this species is tolerant of forest edge (Cheke et al. 2020) and, like other Dicaeum, is unlikely to need pristine forest. No other threats are known or expected.
This species is found on the Philippines where it occurs on Luzon at Mt Polis, Mt Puguis, Mt Tabuan and Dipalayag. It is in relatively secure habitat but appears to occur naturally at low densities, and hence is a very uncommon species. For example, recent surveys of apparently suitable habitat in parts of Mt Pulag and Mt Santo Tomas did not detect the species (R. Hutchinson in litt. 2020).
Inhabits montane forest, especially mossy forest, mostly above 1,500 m (to at least 2,000 m) but locally as low as 800-1,000 m (Poulsen 1995, Allen 2020, Cheke et al. 2020).
Remote sensing data indicate that there has been minimal forest loss in the species' range (Global Forest Watch 2022, based on data from Hansen et al. [2013] and methods disclosed therein) and here are no other identified threats. As a montane species, climate change may impact it in the future.
Conservation Actions Underway
None is known, although it occurs in numerous protected areas including Northern Sierra Madre Natural Park and the Peñablanca Protected Landscape.
Text account compilers
Berryman, A.
Contributors
Bird, J., Butchart, S., Hutchinson, R. & Taylor, J.
Recommended citation
BirdLife International (2024) Species factsheet: Yellow-crowned Flowerpecker Dicaeum anthonyi. Downloaded from
https://datazone.birdlife.org/species/factsheet/yellow-crowned-flowerpecker-dicaeum-anthonyi on 22/12/2024.
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 22/12/2024.