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

Justification of Red List category

The species 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 suspected 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 is described as generally rather scarce but common on Bougainville and Buka islands (del Hoyo et al. 2005).

Trend justification

The population is suspected to be declining owing to forest loss and degradation. In the three generations (12.3 years; Bird et al. 2020) to 2021, remote sensing data indicate that 5-7% of forest was lost in this species' range (Global Forest Watch 2022, using data from Hansen et al. [2013] and methods disclosed therein) and this may accelerate slightly (to an equivalent rate of 7-9%) in the future based on losses in 2017-2021. Population declines are suspected to be roughly equivalent to the rate of tree cover loss, although the species' tolerance of logged and degraded forest is poorly known. The current rate of population decline is therefore placed in the range 1-9% over three generations.

Edolisoma holopolia is endemic to Buka and Bougainville, Papua New Guinea and Choiseul, Isabel, Guadalcanal and Malaita in the Solomons Islands. It is generally scarce, although most common in the hills. 

It occupies the canopy of hill and lowland forest from sea-level to 950 m. Its tolerance of logged and degraded forest is poorly known (Cain and Galbraith 1956, Schodde 1977, Coates 1990, Webb 1992, Buckingham et al. 1995, P. Schofield in litt. 1995, G. Dutson pers. obs. 1998).

Lowland forest throughout the region is threatened by increasingly widespread logging, but as a large proportion of this species' population appears to inhabit forest unsuitable for logging, it is probably declining only relatively slowly (Taylor et al. 2020). In the three generations (12.3 years; Bird et al. 2020) to 2021, remote sensing data indicate that 5-7% of forest was lost in this species' range (Global Forest Watch 2022, using data from Hansen et al. [2013] and methods disclosed therein) and this may accelerate slightly (to an equivalent rate of 7-9%) in the future based on losses in 2017-2021.

Conservation Actions Underway
None is known.

Conservation Actions Proposed
Monitor populations at known sites. Study its tolerance of degraded forest. Protect primary lowland and hill forest at suitable sites where it is known to occur.

Text account compilers
Vine, J.

Contributors
Dutson, G. & Scofield, P.

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Recommended citation
BirdLife International (2024) Species factsheet: Solomon Cicadabird Edolisoma holopolium. Downloaded from https://datazone.birdlife.org/species/factsheet/solomon-cicadabird-edolisoma-holopolium on 23/12/2024.
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 23/12/2024.