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

Taxonomic source(s)
del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A. and Fishpool, L.D.C. 2014. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Volume 1: Non-passerines. Lynx Edicions BirdLife International, Barcelona, Spain and Cambridge, UK.

Red List criteria met

Critically Endangered	Endangered	Vulnerable
-	C2a(ii)	B1ab(i,ii,iii,v); C2a(i,ii); D1

Red List history

Year	Category	Criteria
2018	Endangered	C2a(ii)
2016	Endangered	B1ab(i,ii,iii,v)
2012	Endangered	B1ab(i,ii,iii,v)
2008	Endangered	B1a+b(i,ii,iii,v)
2004	Endangered
2000	Endangered
1996	Endangered
1994	Endangered
1988	Threatened

Migratory status	not a migrant	Forest dependency	high
Land mass type	land-mass type - continent	Average mass	5 g

	Estimate	Data quality
Extent of Occurrence breeding/resident (km2)	7,400	medium
Extent of Occurrence breeding/resident (km2)	2,070
Number of locations	2	-
Severely Fragmented		-

	Value	Data quality	Derivation	Year of estimate
No. of mature individuals	600-1700	poor	estimated	2000
Population trend	decreasing	poor	suspected	-
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	1	-	-	-
Percentage in largest subpopulation	100	-	-	-
Generation length (yrs)	4.2	-	-	-

Population justification: The population is estimated to number 1,000-2,499 individuals based on an assessment of known records, descriptions of abundance and range size. This is consistent with recorded population density estimates for congeners or close relatives with a similar body size, and the fact that only a proportion of the estimated Extent of Occurrence is likely to be occupied. This estimate is equivalent to 667-1,666 mature individuals, rounded here to 600-1,700 mature individuals.

Trend justification: The species's population is suspected to be declining in line with the ongoing clearance of montane forest within its range. However, deforestation analysis by Tracewski et al. (2016) showed an annual decline in forest cover within this species’s range to be c.0.1% between 2000 and 2012, which would roughly equate to a decline of 1.1% over three generations (c.12.5 years).

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

Country/Territory	IBA Name
Mexico	Sierra de Miahuatlán

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Forest	Subtropical/Tropical Moist Lowland	suitable	resident
Forest	Subtropical/Tropical Moist Montane	major	resident
Altitude	1300 - 2500 m	Occasional altitudinal limits	(min) 700 m

Threat (level 1)	Threat (level 2)	Impact and Stresses
Agriculture & aquaculture	Annual & perennial non-timber crops - Scale Unknown/Unrecorded	Timing		Scope		Severity		Impact
		Ongoing		Whole (>90%)		Slow, Significant Declines		Medium Impact: 7
		Stresses Ecosystem degradation, Ecosystem conversion
Climate change & severe weather	Storms & flooding	Timing		Scope		Severity		Impact
		Past, Likely to Return		Whole (>90%)		Unknown		Past Impact
		Stresses Ecosystem degradation

Purpose	Primary form used	Life stage used	Source	Scale	Level	Timing
Pets/display animals, horticulture	-	-		international	non-trivial	recent

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Recommended citation
BirdLife International (2023) Species factsheet: Eupherusa cyanophrys. Downloaded from http://datazone.birdlife.org/species/factsheet/oaxaca-hummingbird-eupherusa-cyanophrys on 29/05/2023. Recommended citation for factsheets for more than one species: BirdLife International (2023) IUCN Red List for birds. Downloaded from http://datazone.birdlife.org on 29/05/2023.