Rough-legged Tyrannulet Phyllomyias burmeisteri


Justification of Red List category
This species has an extremely 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 has not been quantified, but it is not believed to 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 given recent taxonomic splits. Prior to being split, the species has been described as 'uncommon' (Stotz et al. 1996).

Trend justification

The population trend has not been investigated. Tree cover within the range is lost at a rate of 5% over ten years (Global Forest Watch 2021, using Hansen et al. [2013] data and methods disclosed therein). The species is forest-dependent, but is sometimes found in edge and secondary habitat (Fitzpatrick et al. 2004); therefore, population declines are likely roughly equivalent to the rate of tree cover loss. Tentatively, declines are here placed in the band 1-9% over ten years.

Distribution and population

The species occurs in the eastern Andes of Bolivia to northern Argentina. It is found locally in eastern and southeastern Brazil, southeastern Paraguay and northeastern Argentina.


The species inhabits humid tropical and subtropical evergreen forest, sometimes venturing into forest edge and mature secondary growth. It occurs at altitudes between 475 and 1,850 m. It feeds on arthropods and small berries, typically foraging in the middle and upper strata (Fitzpatrick et al. 2004).


Text account compilers
Hermes, C.

Hardenbol, A. & Temple, H.

Recommended citation
BirdLife International (2024) Species factsheet: Phyllomyias burmeisteri. Downloaded from on 26/02/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from on 26/02/2024.