Guianan Gnatcatcher (Polioptila guianensis) - BirdLife species factsheet

Guianan Gnatcatcher Polioptila guianensis

Current view: Data table and detailed info

Taxonomy

Taxonomic note

Polioptila guianensis (SACC [2005 & updates]; Sibley & Monroe [1990, 1993]; Stotz et al. [1996]) and P. clementsi (SACC [2005 & updates]) have been lumped together into P. guianensis 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
2018	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	6 g

Range

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	4,650,000 km²	medium
Severely fragmented?	no	-

Population

	Estimate	Data quality	Derivation	Year of estimate
Population size	unknown	-	-	-
Population trend	stable	-	suspected	-
Rate of change over the future 10 years/3 generations (longer of the two periods)	1-25%	-	-	-
Generation length	3.4 years	-	-	-

Population justification: The global population size has not been quantified, but this species is described as 'uncommon' (Stotz et al. 1996).

Trend justification: This species is suspected to lose 9.8-10.7% of suitable habitat within its distribution over three generations (10 years) based on a model of Amazonian deforestation (Soares-Filho et al. 2006, Bird et al. 2011). It is therefore suspected to decline by <25% over three generations.

Country/territory distribution

Country/Territory	Presence	Origin	Resident
Brazil	extant	native	yes
Colombia	extant	native	yes
French Guiana	extant	native	yes
Guyana	extant	native	yes
Suriname	extant	native	yes
Venezuela	extant	native	yes

Important Bird and Biodiversity Areas (IBA)

Country/Territory	IBA Name
Peru	Cuenca Río Nanay

Habitats & altitude

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Forest	Subtropical/Tropical Moist Lowland	major	resident
Altitude		Occasional altitudinal limits

Recommended citation
BirdLife International (2024) Species factsheet: Guianan Gnatcatcher Polioptila guianensis. Downloaded from https://datazone.birdlife.org/species/factsheet/guianan-gnatcatcher-polioptila-guianensis on 24/11/2024.
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 24/11/2024.