LC
Bewick's Wren Thryomanes bewickii



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
2021 Least Concern
2018 Least Concern
2016 Least Concern
2012 Least Concern
2009 Least Concern
2008 Least Concern
2004 Least Concern
2000 Lower Risk/Least Concern
1994 Lower Risk/Least Concern
1988 Lower Risk/Least Concern
Species attributes

Migratory status full migrant Forest dependency Low
Land mass type Average mass 10 g
Distribution

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 8,690,000 medium
Extent of Occurrence non-breeding (km2) 6,480,000 medium
Number of locations -
Severely Fragmented -
Population and trend
Value Data quality Derivation Year of estimate
No. of mature individuals 7900000 poor inferred 2019
Population trend Decreasing inferred -
Decline (3 years/1 generation past) - - -
Decline (5 years/1 generation past) - - -
Decline (10 years/1 generation past) - - -
Decline (10 years/3 generation future) - - -
Decline (10 years/3 generation past and future) - - -
Number of subpopulations - - -
Percentage in largest subpopulation - - -

Population justification: The global population is inferred to number 7.9 million mature individuals (Partners in Flight 2019).

Trend justification: The species has been undergoing a moderate decline at an average rate of 0.8% per year between 1970 and 2017 (Partners in Flight 2019). The population trend however varies locally, with some populations increasing while others are declining (Meehan et al. 2018).




Country/territory distribution
Country/Territory Occurrence status Presence Resident Breeding Non-breeding Passage
Canada N Extant Yes
Mexico N Extant Yes Yes Yes Yes
USA N Extant Yes Yes Yes Yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Artificial/Terrestrial Urban Areas suitable non-breeding
Artificial/Terrestrial Urban Areas suitable breeding
Forest Subtropical/Tropical Moist Lowland suitable non-breeding
Forest Subtropical/Tropical Moist Lowland suitable breeding
Forest Subtropical/Tropical Moist Montane suitable non-breeding
Forest Subtropical/Tropical Moist Montane suitable breeding
Forest Temperate suitable non-breeding
Forest Temperate suitable breeding
Shrubland Subtropical/Tropical Dry major non-breeding
Shrubland Subtropical/Tropical Dry major breeding
Shrubland Subtropical/Tropical High Altitude suitable non-breeding
Shrubland Subtropical/Tropical High Altitude suitable breeding
Shrubland Subtropical/Tropical Moist suitable non-breeding
Shrubland Subtropical/Tropical Moist suitable breeding
Altitude 0 - 2900 m Occasional altitudinal limits  

Recommended citation
BirdLife International (2022) Species factsheet: Thryomanes bewickii. Downloaded from http://www.birdlife.org on 01/12/2022. Recommended citation for factsheets for more than one species: BirdLife International (2022) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 01/12/2022.