LC
White-lined Antbird Myrmoborus lophotes



Justification

Justification of Red List Category

This species has a very 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). 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 (>30% decline over ten years or three generations). The population size is very large, 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 species is described as fairly common (Stotz et al. 1996, Zimmer and Isler 2020), but the global population size has not been quantified directly. Based on density estimates of a congener (M. myotherinus: 40 mature individuals/km2 in Peru; Santini et al. 2018) and precautionarily assuming that only around 10% of the range is occupied, the total population may number c. 800,000 mature individuals. To account for uncertainty, the population size is therefore placed in the band 500,000-999,999 mature individuals here.

Trend justification
The population trend has not been assessed directly. Forest loss over the past ten years has been low within the range (2%; Global Forest Watch 2020). The species is strictly forest-dependent and may be susceptible to fragmentation and edge effects (A. Lees in litt. 2011), and thus population declines may be exacerbated by habitat degradation and slightly higher than forest loss. The species is therefore tentatively suspected to undergo a slow decline at up to 10% over ten years.

Distribution and population

Myrmoborus lophotes has a restricted range within western Amazonia. It occurs in western Acre, in extreme south-west Amazonian Brazil, including parts of the Serra do Divisor National Park. In south-east Peru, it is found in east Junín, Cuzco, Madre de Dios and Puno; it is known to be present in Manu National Park and Biosphere Reserve, Los Amigos Conservation Concession and Tambopata-Candamo Reserved Zone. Its range extends to Pando and northern La Paz, in north-west Bolivia, including occurrence in Madidi National Park (del Hoyo et al. 2003).

Ecology

This is an understorey species primarily inhabiting stands of Guadua bamboo in both floodplain and upland 'terra firme' forests (D. Lebbin in litt. 2020). It is also found along river edges in 'várzea' (seasonally flooded forest) and transitional forest, usually characterised by the presence of Cecropia, Ochroma and Erythrina trees. It prefers lowlands below 750 m, with occasional records from up to 1,450 m (del Hoyo et al. 2003, Schulenberg et al. 2007, Lebbin 2013).

Threats

The principal threat to the species is forest loss (Bird et al. 2011); however, large tracts of forests within the range are protected in national parks and reserves (Zimmer and Isler 2020).

Conservation actions

Conservation Actions Underway
The species occurs in several protected areas across its range.

Conservation Actions Proposed

Expand the protected area network to effectively protect IBAs. Effectively resource and manage existing and new protected areas, utilising emerging opportunities to finance protected area management with the joint aims of reducing carbon emissions and maximizing biodiversity conservation. Conservation on private lands, through expanding market pressures for sound land management and preventing forest clearance on lands unsuitable for agriculture, is also essential (Soares-Filho et al. 2006). Campaign against proposed changes to the Brazilian Forest Code that would lead to a decrease in the width of the areas of riverine forest protected as Permanent Preservation Areas (APPs), which function as vital corridors in fragmented landscapes.

Identification

14-15 cm. Medium-sized, sexually dimorphic antbird. Has a prominent crest. Male is blackish grey, darkest on the head and breast. Female is yellow-brown above and white below.

Acknowledgements

Text account compilers
Hermes, C.

Contributors
Butchart, S., Ekstrom, J., Khwaja, N., Lebbin, D., Lees, A. & Symes, A.


Recommended citation
BirdLife International (2022) Species factsheet: Myrmoborus lophotes. Downloaded from http://www.birdlife.org on 29/06/2022. Recommended citation for factsheets for more than one species: BirdLife International (2022) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 29/06/2022.