LC
Black-and-white Warbler Mniotilta varia



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.
SACC. 2005 and updates. A classification of the bird species of South America. Available at: https://www.museum.lsu.edu/~Remsen/SACCBaseline.htm.

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 11 g
Range

Estimate Data quality
Extent of Occurrence (breeding/resident) 11,500,000 km2 medium
Extent of Occurrence (non-breeding) 14,900,000 km2 medium
Severely fragmented? no -
Population
Estimate Data quality Derivation Year of estimate
Population size 18000000 mature individuals poor estimated 2019
Population trend stable - estimated -
Generation length 2.47 years - - -

Population justification: The global population is estimated to number 18 million mature individuals (Partners in Flight 2019).

Trend justification: The species is undergoing a moderate decline (Partners in Flight 2019; Rosenberg et al. 2019). Short-term trends suggest that the species has been declining at a rate of 10% over the past ten years, though this value is non-significant (Pardieck et al. 2018).


Country/territory distribution
Country/Territory Presence Origin Resident Breeding visitor Non-breeding visitor Passage migrant
Anguilla (to UK) extant native yes
Antigua and Barbuda extant native yes
Aruba (to Netherlands) extant native yes
Bahamas extant native yes
Barbados extant native yes
Belize extant native yes
Bonaire, Sint Eustatius and Saba (to Netherlands) extant native yes
Canada extant native yes yes
Cayman Islands (to UK) extant native yes
Colombia extant native yes
Costa Rica extant native yes
Cuba extant native yes
CuraƧao (to Netherlands) extant native yes
Dominica extant native yes
Dominican Republic extant native yes
Ecuador extant native yes
El Salvador extant native yes
Faroe Islands (to Denmark) extant vagrant
Guadeloupe (to France) extant native yes
Guatemala extant native yes
Haiti extant native yes
Honduras extant native yes
Ireland extant vagrant
Jamaica extant native yes
Martinique (to France) extant native yes
Mexico extant native yes yes
Montserrat (to UK) extant native yes
Nicaragua extant native yes
Panama extant native yes
Peru extant native yes
Puerto Rico (to USA) extant native yes
Sint Maarten (to Netherlands) extant native yes
St Barthelemy (to France) extant native yes
St Kitts and Nevis extant native yes
St Lucia extant vagrant yes
St Martin (to France) extant native yes
St Pierre and Miquelon (to France) extant native yes
St Vincent and the Grenadines extant vagrant yes
Trinidad and Tobago extant vagrant yes
Turks and Caicos Islands (to UK) extant native yes
United Kingdom extant vagrant
United States Minor Outlying Islands (to USA) extant native yes
USA extant native yes yes yes
Venezuela extant native yes
Virgin Islands (to UK) extant native yes
Virgin Islands (to USA) extant native yes

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

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Boreal major breeding
Forest Subtropical/Tropical Dry suitable non-breeding
Forest Subtropical/Tropical Moist Lowland suitable non-breeding
Forest Subtropical/Tropical Moist Montane suitable non-breeding
Forest Temperate major breeding
Shrubland Subtropical/Tropical Dry suitable non-breeding
Shrubland Subtropical/Tropical High Altitude suitable non-breeding
Shrubland Subtropical/Tropical Moist suitable non-breeding
Altitude   Occasional altitudinal limits  

Threats & impact
Threat (level 1) Threat (level 2) Impact and Stresses
Climate change & severe weather Other impacts Timing Scope Severity Impact
Ongoing Unknown Unknown Unknown
Stresses
Reduced reproductive success

Recommended citation
BirdLife International (2024) Species factsheet: Black-and-white Warbler Mniotilta varia. Downloaded from https://datazone.birdlife.org/species/factsheet/black-and-white-warbler-mniotilta-varia on 28/12/2024.
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 28/12/2024.