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

Justification of Red List category
Although this species may have a restricted range, it is not believed to 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
This is a poorly known species and no population estimates are available. This species is considered to have a high dependency on forest habitat, and tree cover is estimated to have declined by 4.6% 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
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Picumnus fuscus has a moderately small range in várzea forest along the río Guaporé (Iténez) in Beni and Santa Cruz (Noel Kempff Mercado National Park), Bolivia and Rondônia, Brazil (Short 1982, Parker and Rocha 1991, Killeen and Schulenberg 1998). It is poorly known, but observations suggest that it may be relatively common.

It is restricted to várzea forest, where it may favour vine tangles and bamboo (Parker and Rocha 1991).

The río Guaporé is largely uninhabited, and almost continuously forested (Parker and Rocha 1991), but by 1996 there was increasing human colonisation of river banks in the west of the species' range (T. E. H. Stuart in litt. 1998).

Conservation Actions Underway
It occurs in Noel Kempff Mercado National Park, Bolivia.

Conservation Actions Proposed
Effectively protect and manage protected areas where the species occurs. Monitor population at strongholds and search for the species in potentially suitable habitat at new sites. Study its ecology and dependence on várzea forest. Evaluate threats to its habitat.

Text account compilers
Rutherford, C.A.

Contributors
Stuart, T.E.H.

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Recommended citation
BirdLife International (2024) Species factsheet: Rusty-necked Piculet Picumnus fuscus. Downloaded from https://datazone.birdlife.org/species/factsheet/rusty-necked-piculet-picumnus-fuscus 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.