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

Taxonomic note
Apparently closest to S. speluncae (Bornschein et al. 1998) (which see) and S. gonzagai. Monotypic.

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
-	-	B2ab(ii,iii,v)

Red List history

Year	Category	Criteria
2023	Vulnerable	B2ab(ii,iii,v)
2016	Endangered	A3c+4c;B1ab(i,ii,iii,iv,v);C2a(i)
2013	Endangered	A3c+4c;B1ab(i,ii,iii,iv,v);C2a(i)
2012	Endangered	A3c+4c;B1ab(i,ii,iii,iv,v);C2a(i)
2008	Endangered	A3c; A4c; B1a+b(i,ii,iii,iv,v); C2a(i)
2004	Endangered
2000	Endangered
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)	318,500 km2	medium
Area of Occupancy (breeding/resident)	1,956 km2
Severely fragmented?	yes	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	11200 mature individuals	medium	estimated	2020
Population trend	decreasing	poor	inferred	-
Generation length	2.76 years	-	-	-
Number of subpopulations	15-100	-	-	-
Percentage of mature individuals in largest subpopulation	1-89%	-	-	-

Population justification: The species inhabits small patches of habitat, where it is described as rare to uncommon or common (ICMBio 2018, L. Klemann Jr. in litt. 2020). Surveys at Banhado do Maçarico, Rio Grande do Sul, found a density of about 0.5 individuals per hectare, which led to an estimate of 200 breeding pairs at this site (G.N. Mauricio in litt. 2012). In Paraná and Santa Catarina, a density of 3.8 individuals per hectare was recorded (Klemann Jr. and Vieira 2013). Based on these densities, the global population was estimated at 16,800 individuals (L. Klemann Jr. in litt. 2020). This equates to 11,200 mature individuals.

Trend justification: The species is known to have disappeared from degraded and converted areas and to have declined in zones affected by fires (M.R. Bornschein in litt. 2022, G.N. Mauricio in litt. 2022). Pressures on its habitat via land-use change, draining of wetlands and increased frequency of fire continue to negatively affect the population (G.N. Mauricio in litt. 2022).
The construction of a dam in 2001, which flooded parts of the type locality in Iraí, led to drastic population declines; however it has been suggested that the species might be able to recolonise the area (L. Klemann Jr. in litt. 2020). Nevertheless, due to the ongoing threat of habitat degradation and loss, the population is assessed as being in continuing decline.

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

Country/Territory	IBA Name
Brazil	Ouro Preto / Mariana
Brazil	Parque Estadual do Rio Preto
Brazil	Serra do Caraça
Brazil	Serra do Cipó
Brazil	Várzeas da Região Metropolitana de Curitiba

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Grassland	Subtropical/Tropical Seasonally Wet/Flooded	major	resident
Wetlands (inland)	Shrub Dominated Wetlands	major	resident
Altitude	10 - 1850 m	Occasional altitudinal limits

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, Ecosystem conversion
Agriculture & aquaculture	Wood & pulp plantations - Small-holder plantations	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Ecosystem degradation, Ecosystem conversion
Energy production & mining	Mining & quarrying	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Ecosystem degradation, Ecosystem conversion
Invasive and other problematic species, genes & diseases	Invasive non-native/alien species/diseases - Named species	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		Stresses Ecosystem degradation
Natural system modifications	Dams & water management/use - Abstraction of surface water (agricultural use)	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		Stresses Ecosystem degradation, Ecosystem conversion
Natural system modifications	Dams & water management/use - Large dams	Timing		Scope		Severity		Impact
		Future		Majority (50-90%)		Very Rapid 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
Residential & commercial development	Commercial & industrial areas	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Ecosystem degradation, Ecosystem conversion
Residential & commercial development	Housing & urban areas	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Rapid Declines		Medium Impact: 6
		Stresses Ecosystem degradation, Ecosystem conversion
Transportation & service corridors	Roads & railroads	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Ecosystem degradation, Ecosystem conversion

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Recommended citation
BirdLife International (2024) Species factsheet: Marsh Tapaculo Scytalopus iraiensis. Downloaded from https://datazone.birdlife.org/species/factsheet/marsh-tapaculo-scytalopus-iraiensis 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.