Silvery-flanked Antwren (Myrmotherula luctuosa) | Details

Silvery-flanked Antwren Myrmotherula luctuosa

Current view: Data table and detailed info

Taxonomy

Taxonomic note

Myrmotherula axillaris (AOU [1998 and supplements]; SACC [2005 and updates]; Sibley and Monroe [1990, 1993]; Stotz et al. [1996]) and M. fluminensis (SACC [2005 and updates]; Sibley and Monroe [1990, 1993]; Stotz et al. [1996]) have been lumped and subsequently split into M. axillaris and M. luctuosa following del Hoyo and Collar (2016).

Taxonomic source(s)
del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A., Fishpool, L.D.C., Boesman, P. and Kirwan, G.M. 2016. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Volume 2: Passerines. Lynx Edicions and BirdLife International, Barcelona, Spain and Cambridge, UK.

IUCN Red List criteria met and history

Red List criteria met

Critically Endangered	Endangered	Vulnerable
-	-	-

Red List history

Year	Category	Criteria
2024	Least Concern
2016	Least Concern
2012	Not Recognised
2008	Not Recognised
2004	Not Recognised
2000	Not Recognised
1994	Not Recognised
1988	Not Recognised

Species attributes

Migratory status	not a migrant	Forest dependency	high
Land-mass type		Average mass	8 g

Range

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	435,000 km²	medium
Severely fragmented?	no	-

Population

	Estimate	Data quality	Derivation	Year of estimate
Population size	unknown	-	-	-
Population trend	decreasing	-	suspected	-
Rate of change over the future 10 years/3 generations (longer of the two periods)	1-25%	-	-	-
Generation length	3.14 years	-	-	-

Population justification: The global population size has not been quantified, but this species is fairly common in several protected areas (del Hoyo et al. 2003). This species is considered to have a high dependency on forest habitat, and tree cover is estimated to have declined by 9.7% 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 5-9%.

Trend justification: .

Country/territory distribution

Country/Territory	Presence	Origin	Resident	Breeding visitor	Non-breeding visitor	Passage migrant
Brazil	extant	native	yes

Important Bird and Biodiversity Areas (IBA)

Country/Territory	IBA Name

Habitats & altitude

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Artificial/Terrestrial	Subtropical/Tropical Heavily Degraded Former Forest	suitable	resident
Forest	Subtropical/Tropical Moist Lowland	major	resident
Forest	Subtropical/Tropical Swamp	major	resident
Wetlands (inland)	Permanent Rivers/Streams/Creeks (includes waterfalls)	suitable	resident
Altitude	0 - 1200 m	Occasional altitudinal limits

Recommended citation
BirdLife International (2024) Species factsheet: Silvery-flanked Antwren Myrmotherula luctuosa. Downloaded from https://datazone.birdlife.org/species/factsheet/silvery-flanked-antwren-myrmotherula-luctuosa on 26/12/2024.
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 26/12/2024.