NT
Sumichrast's Wren Hylorchilus sumichrasti



Taxonomy

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.

IUCN Red List criteria met and history
Red List criteria met
Critically Endangered Endangered Vulnerable
- - -

Red List history
Year Category Criteria
2020 Near Threatened B1ab(ii,iii,v)
2016 Near Threatened B1b(ii)
2013 Near Threatened B1ab(ii,iii,v);C2a(ii)
2012 Near Threatened B1ab(ii,iii,v);C2a(ii)
2008 Near Threatened B1a+b(iii); C2a(i)
2004 Near Threatened
2000 Lower Risk/Near Threatened
1996 Vulnerable
1994 Vulnerable
1988 Not Recognised
Species attributes

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

Estimate Data quality
Extent of Occurrence (breeding/resident) 8,200 km2 medium
Number of locations 11-100 -
Severely fragmented? no -
Population
Estimate Data quality Derivation Year of estimate
Population size 10000-19999 mature individuals poor estimated 2012
Population trend decreasing - suspected -
Generation length 2.83 years - - -

Population justification: Partners in Flight (2019) estimate the population to number <50,000 individuals; however, this is likely an overestimate as the species occurs at a low density (A. Townsend Peterson in litt. 2016). Thus it is here placed in the band for 10,000-19,999 mature individuals.

Trend justification: The population is suspected to be in decline owing to on-going habitat destruction and degradation (del Hoyo et al. 2005). The State of North America's Birds assesses the population trend as steeply declining (NABCI 2016).


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

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Mexico Cerro de Oro
Mexico Presa Temascal
Mexico Sierra de Zongolica-Tenango

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Artificial/Terrestrial Plantations major resident
Forest Subtropical/Tropical Moist Lowland major resident
Altitude 75 - 1000 m Occasional altitudinal limits  

Threats & impact
Threat (level 1) Threat (level 2) Impact and Stresses
Agriculture & aquaculture Annual & perennial non-timber crops - Agro-industry farming Timing Scope Severity Impact
Ongoing Minority (<50%) Negligible declines Low Impact: 4
Stresses
Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture Livestock farming & ranching - Agro-industry grazing, ranching or farming Timing Scope Severity Impact
Ongoing Majority (50-90%) Negligible declines Low Impact: 5
Stresses
Ecosystem degradation, Ecosystem conversion
Energy production & mining Mining & quarrying 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
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Ecosystem degradation, Ecosystem conversion

Recommended citation
BirdLife International (2024) Species factsheet: Sumichrast's Wren Hylorchilus sumichrasti. Downloaded from https://datazone.birdlife.org/species/factsheet/sumichrasts-wren-hylorchilus-sumichrasti on 24/12/2024.
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 24/12/2024.