• 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.
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
-	-	A2c+3c+4c

Red List history

Year	Category	Criteria
2024	Vulnerable	A2c+3c+4c
2016	Vulnerable	A2c
2012	Vulnerable	A2c
2008	Vulnerable	A2c
2004	Vulnerable
2000	Vulnerable
1996	Endangered
1994	Endangered
1988	Threatened

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)	1,120,000 km2	medium
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	unknown	-	-	-
Population trend	decreasing	poor	inferred	2015-2025
Rate of change over the past 10 years/3 generations (longer of the two periods)	30-49%	-	-	-
Rate of change over the future 10 years/3 generations (longer of the two periods)	30-49%	-	-	-
Rate of change over the past & future 10 years/3 generations (longer of the two periods)	30-49%	-	-	-
Generation length	2.12 years	-	-	-
Number of subpopulations	4-100	-	-	-
Percentage of mature individuals in largest subpopulation	1-89%	-	-	-

Population justification: The population size has not been quantified, but the species is described as scarce and local (Tyler 2020, Silveira et al. 2023, see also eBird 2023).

Trend justification: Despite the lack of quantitative data on trends or recent population estimates, the continuing threats posed to occupied habitats suggest that population declines are likely to be occurring. These have already led to local extinctions in São Paulo state, Brazil (Silveira et al. 2023).
At the national level in Brazil, a rate of population decline was derived from a model of past habitat loss and projected future habitat loss (Silveira et al. 2023 and references therein). The model indicated a loss of 28% of suitable habitat during 2015-2025, assuming an exponential decline. In Argentina, the rate of population decline is placed in the band 50-79% over ten years (MAyDS and AA 2017), and the species is considered threatened in Uruguay (Azpiroz et al. 2018). There is no information from Paraguay, but considering the degree of habitat conversion (using ongoing tree cover loss as a proxy, Global Forest Watch 2023) it is likely that the population is likewise undergoing rapid declines. In the absence of an exact quantification of the populations in each country the overall trend rate cannot be determined, but considering the above information the global population is suspected to decline at a rate of 30-49% over ten years.

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

Country/Territory	IBA Name
Argentina	Concepción-Chavarría
Argentina	Cuenca del río Aguapey
Argentina	Estancia Mora Cué y alrededores
Argentina	Estancia Puerto Valle
Argentina	Estancia San Juan Poriahú
Argentina	Lomada de San Alonso
Argentina	Reserva Natural Rincón de Santa María
Argentina	Rincón del Socorro-Iberá
Brazil	Campos de Cima da Serra
Paraguay	Estancia La Graciela
Paraguay	Estero Ñu Guazú - General Artigas
Paraguay	Estero Ypyta
Paraguay	Isla Yacyretá
Paraguay	Lago Ypoa
Paraguay	Parque Nacional San Rafael
Paraguay	Tapyta
Paraguay	Yabebyry
Uruguay	El Tapado Grasslands
Uruguay	San Antonio

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Artificial/Terrestrial	Plantations	marginal	resident
Grassland	Subtropical/Tropical Dry	major	resident
Altitude	0 - 1450 m	Occasional altitudinal limits

Threat (level 1)	Threat (level 2)	Impact and Stresses
Agriculture & aquaculture	Annual & perennial non-timber crops - Agro-industry farming	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		Stresses Ecosystem conversion
Agriculture & aquaculture	Livestock farming & ranching - Agro-industry grazing, ranching or 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 - Agro-industry plantations	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		Stresses Ecosystem degradation, Ecosystem conversion
Energy production & mining	Mining & quarrying	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Negligible declines		Low Impact: 4
		Stresses Ecosystem degradation, Ecosystem conversion
Invasive and other problematic species, genes & diseases	Invasive non-native/alien species/diseases - Unspecified species	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Ecosystem degradation
Natural system modifications	Fire & fire suppression - Increase in fire frequency/intensity	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		Stresses Ecosystem degradation
Residential & commercial development	Housing & urban areas	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Ecosystem conversion

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Recommended citation
BirdLife International (2024) Species factsheet: Ochre-breasted Pipit Anthus nattereri. Downloaded from https://datazone.birdlife.org/species/factsheet/ochre-breasted-pipit-anthus-nattereri 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.