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

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.
Duckworth, J. W.; Alström, P.; Davidson, P.; Evans, T. D.; Poole, C. M.; Setha, T.; Timmins, R. J. 2001. A new species of wagtail from the lower Mekong basin. Bulletin of the British Ornithologists' Club 121(3): 152-182.

Red List criteria met

Critically Endangered	Endangered	Vulnerable
-	-	-

Red List history

Year	Category	Criteria
2020	Near Threatened	A3bc; C1
2016	Near Threatened	A3bc;C1+2a(ii)
2012	Near Threatened	A3bc;C1+2a(ii)
2008	Near Threatened	A3b,c; C1; C2a(ii)
2004	Near Threatened
2002	Near Threatened
2000	Not Recognised
1994	Not Recognised
1988	Not Recognised

Migratory status	not a migrant	Forest dependency	does not normally occur in forest
Land-mass type	continent	Average mass	-

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	56,100 km2	medium
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	6000-15000 mature individuals	poor	suspected	2008
Population trend	decreasing	poor	suspected	-
Rate of change over the future 10 years/3 generations (longer of the two periods)	20-29%	-	-	-
Generation length	4.7 years	-	-	-

Population justification: A preliminary population estimate of 10,000-19,999 individuals assumes that the species's population is moderately small owing to its highly specialised habitat requirements and restricted distribution. This estimate equates to 6,667-13,333 mature individuals, rounded here to 6,000-15,000 mature individuals.

Trend justification: Moderately rapid declines of 20-29% are suspected to take place in the next three generations (14.1; Bird et al. 2020) owing to the proposed construction of a number of dams (Tyler and de Juana 2020), which will almost certainly impact upon the species's specialised habitat.

Country/Territory	Presence	Origin	Resident	Breeding visitor	Non-breeding visitor	Passage migrant
Cambodia	extant	native		yes
Laos	extant	native		yes
Thailand	extant	native			yes
Vietnam	extant	native		yes

Country/Territory	IBA Name
Cambodia	Lomphat
Cambodia	Mekong River from Kratie to Lao PDR
Cambodia	Sekong River
Cambodia	Sesan River
Laos	Mekong River from Phou Xiang Thong to Siphandon
Laos	Siphandon
Laos	Xe Kong Plains

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Shrubland	Subtropical/Tropical Moist	major	resident
Wetlands (inland)	Permanent Rivers/Streams/Creeks (includes waterfalls)	major	resident
Altitude		Occasional altitudinal limits

Threat (level 1)	Threat (level 2)	Impact and Stresses
Natural system modifications	Dams & water management/use - Dams (size unknown)	Timing		Scope		Severity		Impact
		Future		Majority (50-90%)		Rapid Declines		Medium Impact: 6
		Stresses Ecosystem degradation
Residential & commercial development	Commercial & industrial areas	Timing		Scope		Severity		Impact
		Future		Majority (50-90%)		Rapid Declines		Medium Impact: 6
		Stresses Ecosystem degradation, Ecosystem conversion

Purpose	Scale
Pets/display animals, horticulture	international

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Recommended citation
BirdLife International (2024) Species factsheet: Mekong Wagtail Motacilla samveasnae. Downloaded from https://datazone.birdlife.org/species/factsheet/mekong-wagtail-motacilla-samveasnae on 22/12/2024.
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 22/12/2024.