LC
Winter Wren Troglodytes hiemalis



Taxonomy

Taxonomic note

Troglodytes troglodytes, T. pacificus and T. hiemalis (del Hoyo and Collar 2016) were previously lumped as T. troglodytes following AERC TAC (2003), AOU (1998 & supplements), Cramp et al. (1977-1994), Sibley & Monroe (1990, 1993) and Stotz et al. (1996).

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
2016 Least Concern
Species attributes

Migratory status full migrant Forest dependency Medium
Land mass type Average mass 9 g
Distribution

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 7,210,000 medium
Extent of Occurrence non-breeding (km2) 4,360,000 medium
Number of locations -
Severely Fragmented -
Population and trend
Value Data quality Derivation Year of estimate
No. of mature individuals 11000000 poor estimated 2019
Population trend Increasing 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 estimated to number 11 million mature individuals (Partners in Flight 2019).

Trend justification: The species has been undergoing a large, significant increase at an average rate of 1% per year between 1970 and 2017 (Partners in Flight 2019; Rosenberg et al. 2019). Trends however vary locally, with some populations in the northern and eastern part of the range increasing, while populations in the south are declining (Meehan et al. 2018).


Country/territory distribution
Country/Territory Occurrence status Presence Resident Breeding Non-breeding Passage
Canada N Extant Yes Yes Yes
Mexico N Extant Yes
St Pierre and Miquelon (to France) N Extant Yes
USA N Extant Yes Yes Yes Yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Canada Strathcona Provincial Park
Canada Norfolk Forest Complex
Canada Point Abino

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Artificial/Terrestrial Rural Gardens suitable breeding
Artificial/Terrestrial Rural Gardens suitable non-breeding
Artificial/Terrestrial Urban Areas suitable breeding
Artificial/Terrestrial Urban Areas suitable non-breeding
Forest Boreal major breeding
Forest Subtropical/Tropical Moist Lowland suitable breeding
Forest Subtropical/Tropical Moist Lowland suitable non-breeding
Forest Temperate major breeding
Forest Temperate major non-breeding
Shrubland Boreal suitable breeding
Shrubland Boreal suitable non-breeding
Shrubland Temperate suitable breeding
Shrubland Temperate suitable non-breeding
Altitude   Occasional altitudinal limits  

Utilisation
Purpose Primary form used Life stage used Source Scale Level Timing
Food - human - - Non-trivial Recent
Pets/display animals, horticulture - - International Non-trivial Recent

Recommended citation
BirdLife International (2022) Species factsheet: Troglodytes hiemalis. Downloaded from http://www.birdlife.org on 13/08/2022. Recommended citation for factsheets for more than one species: BirdLife International (2022) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 13/08/2022.