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

Taxonomic note
Premnoplex tatei and P. pariae (del Hoyo and Collar 2016) were previously lumped as P. tatei following SACC (2005 & updates), Sibley and Monroe (1990, 1993) and Stotz et al. (1996).

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.

Red List criteria met

Critically Endangered	Endangered	Vulnerable
-	B1ab(ii,iii)	B1ab(ii,iii)+2ab(ii,iii); D2

Red List history

Year	Category	Criteria
2024	Endangered	B1ab(ii,iii)
2016	Endangered	B1ab(i,ii,iii,v)
2012	Not Recognised
2008	Not Recognised
2004	Not Recognised
2000	Not Recognised
1994	Not Recognised
1988	Not Recognised

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

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	2,040 km2	medium
Area of Occupancy (breeding/resident)	1,852 km2
Number of locations	2-5	-
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	5000-12800 mature individuals	medium	estimated	1994
Population trend	decreasing	poor	suspected	2017-2027
Rate of change over the past 10 years/3 generations (longer of the two periods)	1-9%	-	-	-
Rate of change over the future 10 years/3 generations (longer of the two periods)	10-19%	-	-	-
Rate of change over the past & future 10 years/3 generations (longer of the two periods)	10-19%	-	-	-
Generation length	2.74 years	-	-	-
Number of subpopulations	1	-	-	-
Percentage of mature individuals in largest subpopulation	100%	-	-	-

Population justification: The population size has not been quantified, but the species is described as uncommon or rare, and absent from seemingly suitable habitat (Hilty 2003, Greeney and Remsen Jr. 2020).
The closely related Premnoplex pariae, with which it was formerly considered conspecific, was found at a density of 0.8 individuals/ha (Evans et al. 1994). Assuming that P. tatei occurs at the same density, and further assuming that only around 10-20% of forests within the range are occupied to account for the species's rarity (per Hilty 2003), the population may number 7,520-19,200 individuals, roughly equating to 5,000-12,800 mature individuals. However, given the age of this estimate and the suspected slow decline of the population, an up-to-date estimate is required.

Trend justification: The species is suspected to be declining as a consequence of the loss, fragmentation and degradation of its forested habitat.
Over the past ten years, 4% of  tree cover within the range has been lost; since 2017 this has been accelerating to a rate equivalent to 6% over ten years (Global Forest Watch 2023, using Hansen et al. [2013] data and methods disclosed therein). The species is strongly dependent on humid forests (Sharpe and Lentino 2015, Greeney and Remsen Jr. 2020) and therefore, population declines may exceed the rate of tree cover loss. Tentatively, the rate of population decline is therefore placed in the band 1-9% over the past ten years, accelerating to 10-19% since 2017.

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

Country/Territory	IBA Name
Venezuela	Parque Nacional El Guácharo
Venezuela	Zona Protectora Macizo Montañoso del Turimiquire

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Forest	Subtropical/Tropical Moist Montane	major	resident
Altitude	800 - 2410 m	Occasional altitudinal limits

Threat (level 1)	Threat (level 2)	Impact and Stresses
Agriculture & aquaculture	Annual & perennial non-timber crops - Shifting agriculture	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		Stresses Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture	Annual & perennial non-timber crops - Small-holder farming	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		Stresses Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture	Wood & pulp plantations - Small-holder plantations	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		Stresses Ecosystem degradation, Ecosystem conversion
Natural system modifications	Fire & fire suppression - Increase in fire frequency/intensity	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Ecosystem degradation

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Recommended citation
BirdLife International (2024) Species factsheet: White-throated Barbtail Premnoplex tatei. Downloaded from https://datazone.birdlife.org/species/factsheet/white-throated-barbtail-premnoplex-tatei 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.