• 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. and Fishpool, L.D.C. 2014. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Volume 1: Non-passerines. Lynx Edicions BirdLife International, Barcelona, Spain and Cambridge, UK.
SACC. 2005 and updates. A classification of the bird species of South America. Available at: https://www.museum.lsu.edu/~Remsen/SACCBaseline.htm.

Red List criteria met

Critically Endangered	Endangered	Vulnerable
-	-	-

Red List history

Year	Category	Criteria
2024	Near Threatened	C2a(i)
2016	Near Threatened	C2a(i)
2012	Near Threatened	C2a(i)
2008	Near Threatened	C2a(i)
2006	Near Threatened
2004	Near Threatened
2000	Lower Risk/Near Threatened
1994	Lower Risk/Near Threatened
1988	Near Threatened

Migratory status	altitudinal migrant	Forest dependency	does not normally occur in forest
Land-mass type	continent	Average mass	36 g

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	1,935,800 km2	medium
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	1500-7000 mature individuals	poor	estimated	2023
Population trend	decreasing	poor	suspected	-
Generation length	3.06 years	-	-	-
Number of subpopulations	2-100	-	-	-
Percentage of mature individuals in largest subpopulation	1-89%	-	-	-

Population justification: Despite its large vast range, P. mitchellii is very patchily distributed and is thought to have a small population size. Boyla and Estrada (2005) and Wetlands International (2012) both cite a best-guess estimate of less than 10,000 individuals. More recently, Lesterhuis et al. (in prep.) more precisely estimate 3,300 individuals. To account for considerably uncertainty, the total global population is estimate at 2,500-9,999 individuals, not all of which will be mature. The breeding population is estimated at c.1,500-7,000 mature individuals.

Trend justification: No monitoring data are available from which to robustly estimate trends. Precautionarily, suspected to be (probably slowly) declining, in response to a number of threats to its habitat including conversion of peatlands to agriculture, including the direct extraction of peat (Sayers II 2020). Peatlands in the Andes are also projected to contract in extent in response to climate change (Gibbons 2012) which may negatively impact this species.

Country/Territory	Presence	Origin	Resident	Breeding visitor	Non-breeding visitor	Passage migrant
Argentina	extant	native	yes
Bolivia	extant	native	yes
Chile	extant	native	yes
Peru	extant	native	yes

Country/Territory	IBA Name
Argentina	Parque Nacional Campo de los Alisos
Argentina	Parque Provincial Cumbres Calchaquíes
Argentina	Parque Provincial La Florida
Argentina	Reserva Provincial Laguna Brava
Argentina	Reserva Provincial Olaroz-Cauchari
Argentina	Sierra de Santa Victoria
Bolivia	Lagunas de Agua Dulce del Sureste de Potosí
Bolivia	Parque Nacional Sajama
Bolivia	Southern slopes of Tunari National Park (Vertiente Sur del Parque Nacional Tunari IBA)
Peru	Reserva Nacional Salinas y Aguada Blanca

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Grassland	Subtropical/Tropical High Altitude	major	resident
Wetlands (inland)	Bogs, Marshes, Swamps, Fens, Peatlands	major	resident
Altitude	2850 - 5000 m	Occasional altitudinal limits	(min) 2000 m

Threat (level 1)	Threat (level 2)	Impact and Stresses
Agriculture & aquaculture	Livestock farming & ranching - Small-holder grazing, ranching or farming	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Ecosystem degradation
Climate change & severe weather	Habitat shifting & alteration	Timing		Scope		Severity		Impact
		Ongoing		Whole (>90%)		Unknown		Unknown
		Stresses Ecosystem conversion
Energy production & mining	Mining & quarrying	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Ecosystem degradation
Human intrusions & disturbance	Recreational activities	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Species disturbance
Natural system modifications	Dams & water management/use - Abstraction of surface water (domestic use)	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Ecosystem degradation
Transportation & service corridors	Roads & railroads	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Species disturbance, Ecosystem degradation

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Recommended citation
BirdLife International (2024) Species factsheet: Diademed Plover Phegornis mitchellii. Downloaded from https://datazone.birdlife.org/species/factsheet/diademed-plover-phegornis-mitchellii on 23/11/2024.
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 23/11/2024.