LC
Ruby-crowned Kinglet Corthylio calendula



Taxonomy

Taxonomic source(s)
AERC TAC. 2003. AERC TAC Checklist of bird taxa occurring in Western Palearctic region, 15th Draft. Available at: #http://www.aerc.eu/DOCS/Bird_taxa_of _the_WP15.xls#.
Cramp, S. and Simmons, K.E.L. (eds). 1977-1994. Handbook of the birds of Europe, the Middle East and Africa. The birds of the western Palearctic. Oxford University Press, Oxford.
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
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 medium
Land-mass type Average mass -
Range

Estimate Data quality
Extent of Occurrence (breeding/resident) 18,300,000 km2 medium
Extent of Occurrence (non-breeding) 11,600,000 km2 medium
Severely fragmented? no -
Population
Estimate Data quality Derivation Year of estimate
Population size 100000000 mature individuals poor estimated 2019
Population trend increasing - estimated -
Rate of change over the past 10 years/3 generations (longer of the two periods) 23% - - -
Generation length 2 years - - -

Population justification: The global population is estimated to number 100 million mature individuals (Partners in Flight 2019).

Trend justification: The species is increasing (Partners in Flight 2019). Short-term trends suggest that the population increased by 23% over the past ten years (Pardieck et al. 2018).


Country/territory distribution
Country/Territory Presence Origin Resident Breeding visitor Non-breeding visitor Passage migrant
Bahamas extant vagrant yes
Canada extant native yes yes yes
Cayman Islands (to UK) extant vagrant yes
Cuba extant vagrant yes
Dominican Republic extant vagrant yes
Greenland (to Denmark) extant vagrant
Guatemala extant vagrant yes
Iceland extant vagrant
Jamaica extant vagrant yes
Mexico extant native yes
St Pierre and Miquelon (to France) extant native yes
Turks and Caicos Islands (to UK) extant vagrant yes
USA extant native yes yes yes yes

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

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Subtropical/Tropical Moist Montane suitable non-breeding
Forest Subtropical/Tropical Moist Montane suitable breeding
Forest Temperate major breeding
Altitude 0 - 1300 m Occasional altitudinal limits  

Recommended citation
BirdLife International (2024) Species factsheet: Corthylio calendula. Downloaded from https://datazone.birdlife.org/species/factsheet/ruby-crowned-kinglet-corthylio-calendula on 26/02/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from https://datazone.birdlife.org on 26/02/2024.