Worm-eating Warbler (Helmitheros vermivorum)

Worm-eating Warbler Helmitheros vermivorum

Current view: Data table and detailed info

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.
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	-

Range

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	2,520,000 km²	medium
Extent of Occurrence (non-breeding)	4,980,000 km²	medium
Severely fragmented?	no	-

Population

	Estimate	Data quality	Derivation	Year of estimate
Population size	780000 mature individuals	poor	estimated	2019
Population trend	increasing	-	estimated	-
Rate of change over the past 10 years/3 generations (longer of the two periods)	12%	-	-	-
Generation length	2.36 years	-	-	-

Population justification: The global population is estimated to number 780,000 mature individuals (Partners in Flight 2019).

Trend justification: The population has been roughly stable over the past five decades (Partners in Flight 2019). Short-term trends however suggest that the species is now increasing at a rate of 12% over the past ten years, though this value is non-significant (Pardieck et al. 2018).

Country/territory distribution

Country/Territory	Presence	Origin	Breeding visitor	Non-breeding visitor	Passage migrant
Anguilla (to UK)	extant	vagrant		yes
Antigua and Barbuda	extant	vagrant		yes
Bahamas	extant	native		yes
Belize	extant	native		yes
Canada	extant	vagrant	yes
Cayman Islands (to UK)	extant	native		yes
Colombia	extant	vagrant		yes
Costa Rica	extant	native		yes
Cuba	extant	native		yes
Dominican Republic	extant	native		yes
El Salvador	extant	native		yes	yes
Guadeloupe (to France)	extant	vagrant		yes
Guatemala	extant	native		yes	yes
Haiti	extant	native		yes
Honduras	extant	native		yes	yes
Jamaica	extant	native		yes
Martinique (to France)	extant	vagrant		yes
Mexico	extant	native		yes	yes
Nicaragua	extant	native		yes	yes
Panama	extant	native		yes
Puerto Rico (to USA)	extant	native		yes
St Pierre and Miquelon (to France)	extant	vagrant
Turks and Caicos Islands (to UK)	extant	native
USA	extant	native	yes		yes
Venezuela	extant	vagrant		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	Subtropical/Tropical Mangrove Vegetation Above High Tide Level	major	non-breeding
Forest	Temperate	major	breeding
Altitude	0 - 1500 m	Occasional altitudinal limits	(max) 2000 m

Recommended citation
BirdLife International (2024) Species factsheet: Worm-eating Warbler Helmitheros vermivorum. Downloaded from https://datazone.birdlife.org/species/factsheet/worm-eating-warbler-helmitheros-vermivorum on 23/11/2024.
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 23/11/2024.