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

Justification of Red List category
This species has been recorded at only a small number of sites; it appears to be rare and likely has a small population. Declines are suspected on the basis of accelerating rates of habitat conversion. The species is therefore assessed as Near Threatened.

Population justification
The global population size has not been quantified. Despite some survey effort in potentially suitable habitat the species is only occasionally recorded, and is assumed to be genuinely rare (Collar and Sharpe 2020, eBird 2022). The population is therefore here tentatively placed in the band 2,500-9,999 mature individuals.
Its inconspicuous and silent habits during the dry season may however lead to it being under-recorded (Collar and Sharpe 2020); an accurate quantification of the population size is urgently required.

Trend justification
There are no data on the population trend, but declines are suspected on the basis of the species' forest dependence and ongoing deforestation in the region.
Over the past three generations (11.3 years), 7% of tree cover has been lost within the range; since 2016 this has been increasing to a rate equivalent to 12% (Global Forest Watch 2022, using Hansen et al. [2013] data and methods disclosed therein). Under the assumption that population declines are roughly equivalent to the rate of tree cover loss, the species is suspected to have declined by 1-9% over the past three generations. With increasing deforestation, population declines are likewise suspected to accelerate, to a rate of 10-19% over three generations into the future.

Turdus haplochrous is known from few localities in Beni and north-west Santa Cruz, north Bolivia.

It occurs in seasonally flooded riverine forest (várzea), gallery forest, semi-open forest and semi-deciduous woodland, often in dense undergrowth (White et al. 1995, Collar and Sharpe 2020). Its ecology is largely unknown.

While until recently the species' habitat was not considered under threat (White et al. 1995), deforestation within the range has been increasing tremendously since around 2016 (Global Forest Watch 2022). The main driver for the conversion of lowland forests in Beni and Santa Cruz is agro-industry farming, e.g. for the production of soy beans, followed by smallholder farming and cattle ranching (Müller et al. 2012, WWF undated).

Conservation Actions Underway
The species occurs in Beni Biosphere Reserve.

Conservation Actions Proposed
Conduct further surveys to fully determine the species' distribution and to accurately quantify the population size, particularly during the wet season when the species may be more conspicuous and easier to detect. Research the species' ecology and behaviour. Quantify the impact of threats on the population size. Monitor the population trend. Monitor rates of habitat loss.
Protect areas of suitable habitat within the range. Effectively manage protected areas where it occurs. Raise awareness for the species with the aim of reducing pressures on its habitat.

Text account compilers
Hermes, C.

Contributors
Butchart, S., Gilroy, J., Lane, D., Mahood, S., Sharpe, C.J. & Taylor, J.

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Recommended citation
BirdLife International (2024) Species factsheet: Unicolored Thrush Turdus haplochrous. Downloaded from https://datazone.birdlife.org/species/factsheet/unicolored-thrush-turdus-haplochrous 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.