• Summary
• Text account
• Data table and detailed info
• Distribution map
• Reference and further resources

Justification of Red List category

This species has a large range and 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). Although the population trend is inferred to be decreasing, it does not 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 and hence does not 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 global population size has not been quantified, but the species has been described as common to uncommon (del Hoyo et al. 2006, Dutson 2011).

Trend justification
Inferred to be declining owing to forest loss and degradation. Remote sensing data (Global Forest Watch 2022, using Hansen et al. [2013] data and methods disclosed therein) indicate that in the ten years to 2020, forest loss in this species' range has been equivalent to c. 6-8%. This may accelerate slightly (to an equivalent rate of 7-9%) in the future based on losses 2015-2020. This species is thought to be rare in heavily degraded forest (Dutson 2011), although much of the population occurs in hilly regions above the altitudes threatened by logging (Clement et al. 2020). The current rate of decline is therefore placed in the range 1-9%.

Symposiachrus barbatus is endemic to Bougainville and Buka in Papua New Guinea and Shortlands, Choiseul, Isabel, Florida and Guadalcanal in the Solomon Islands. While the AOO has not been estimated due to uncertainty over actual occupancy throughout range, it is likely to exceed thresholds for listing as threatened: 18,970 km² of forest cover remains within the range of the species (Global Forest Watch 2022).

It occurs in primary and old-growth closed-canopy secondary forest to at least 1,200 m (Cain and Galbraith 1956, Schodde 1977, Coates 1990, Webb 1992, Buckingham et al. 1995, Dutson 2011). Occurs less frequently in second growth and occasionally near houses and villages; mostly 250–1000 m (Clement et al. 2020). It is rare in flat lowland forest and heavily degraded forest (Dutson 2011).

Large areas of the lowland forest across the region have been logged or are under logging concessions but as much of the population occurs in hilly regions, it is probably only declining at a moderate rate (Clement et al. 2020).

Conservation Actions Underway
None is known.

Conservation Actions Proposed
Conduct research to determine population size. Regularly monitor the population at certain sites. Research its tolerance of degraded forest. Set aside and protect significant areas of remaining primary forest from logging on all islands where it occurs.

Text account compilers
Vine, J.

Contributors
Dutson, G., Wheatley, H., Derhé, M., Mahood, S. & O'Brien, A.

---

Recommended citation
BirdLife International (2024) Species factsheet: Solomons Pied Monarch Symposiachrus barbatus. Downloaded from https://datazone.birdlife.org/species/factsheet/solomons-pied-monarch-symposiachrus-barbatus 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.