• Summary
• Text account
• Data table and detailed info
• Distribution map
• Reference and further resources

Taxonomic note

Leiothlypis crissalis (del Hoyo and Collar 2016) was previously placed in the genus Vermivora following AOU (1998 & supplements); Sibley and Monroe (1990, 1993); 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.

Red List criteria met

Critically Endangered	Endangered	Vulnerable
-	-	-

Red List history

Year	Category	Criteria
2020	Least Concern
2019	Least Concern
2016	Least Concern
2012	Least Concern
2008	Near Threatened	A2c,e; A3c,e; A4c,e
2004	Near Threatened
2000	Lower Risk/Near Threatened
1994	Lower Risk/Near Threatened
1988	Near Threatened

Migratory status	full migrant	Forest dependency	high
Land-mass type	continent	Average mass	9 g

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	100,000 km2	medium
Extent of Occurrence (non-breeding)	203,000 km2	medium
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	25000 mature individuals	medium	estimated	2003
Population trend	stable	poor	suspected	1998-2008
Generation length	2.3 years	-	-	-

Population justification: The global population is estimated to number 25,000 mature individuals (Partners in Flight 2019).

Trend justification: A remote sensing study found that habitat loss within the range has been negligible (< 1% over three generations; Tracewski et al. 2016). Therefore, in the absence of evidence for any declines or substantial threats, the species is assessed as being stable.

Country/Territory	Presence	Origin	Resident	Breeding visitor	Non-breeding visitor	Passage migrant
Mexico	extant	native		yes	yes	yes
USA	extant	native		yes		yes

Country/Territory	IBA Name
Mexico	Nevado de Colima
Mexico	San Antonio Peña Nevada
Mexico	Sierra del Burro
Mexico	Sierra Maderas del Carmen
Mexico	Tancítaro

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Forest	Subtropical/Tropical Moist Montane	major	non-breeding
Forest	Subtropical/Tropical Moist Montane	major	breeding
Altitude	1500 - 3000 m	Occasional altitudinal limits

Threat (level 1)	Threat (level 2)	Impact and Stresses
Agriculture & aquaculture	Livestock farming & ranching - Small-holder grazing, ranching or farming	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Ecosystem degradation, Ecosystem conversion
Invasive and other problematic species, genes & diseases	Invasive non-native/alien species/diseases - Canis familiaris	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Species mortality
Invasive and other problematic species, genes & diseases	Invasive non-native/alien species/diseases - Capra hircus	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Ecosystem degradation
Invasive and other problematic species, genes & diseases	Invasive non-native/alien species/diseases - Felis catus	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Species mortality
Invasive and other problematic species, genes & diseases	Invasive non-native/alien species/diseases - Ovis aries	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Ecosystem degradation
Invasive and other problematic species, genes & diseases	Problematic native species/diseases - Molothrus ater	Timing		Scope		Severity		Impact
		Ongoing		Whole (>90%)		Slow, Significant Declines		Medium Impact: 7
		Stresses Reduced reproductive success

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Recommended citation
BirdLife International (2024) Species factsheet: Colima Warbler Leiothlypis crissalis. Downloaded from https://datazone.birdlife.org/species/factsheet/colima-warbler-leiothlypis-crissalis 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.