Family Hummingbirds (Trochilidae)

Critically Endangered

Guanacaste Hummingbird (Amazilia alfaroana)


French: Ariane d’Alfaro German: Guanacasteamazilie Spanish: Amazilia de Guanacaste

Amazilia alfaroana


, 1896,

Volcán de Miravalles


Previously considered conspecific with A. cyanifrons​. Status has been difficult to resolve, being known from a single specimen; apparently closely related to A. cyanifrons, but has a slightly longer bill, paler and less extensive blue cap, more continuously green chin to belly, richer russet uppertail-coverts, and bluish-black undertail-coverts with narrow whitish edges; a hybrid origin is most unlikely for phenotypical reasons, and species status has been validated by independent commentators#R#R; lack of records since 1895 raises possibility of extinction. Monotypic.


Volcán de Miravalles (NW Costa Rica); possibly extinct.

Descriptive notes

c. 9 cm. Adult male has straight, mid-length, blackish bill, with basal two-thirds of mandible probably fleshy red (described as “pale” in the type description), slightly... read more




Almost nothing known; the unique type was collected probably at a point somewhere between 450 m and... read more

Food and feeding

Nothing known.


No information.


None known.

Status and conservation

CRITICALLY ENDANGERED. Known solely from a single specimen, originally judged to be a female but almost certainly a male, which was collected somewhere on the SW slope of... read more

Recommended citation

Kirwan, G.M. (2019). Guanacaste Hummingbird (Amazilia alfaroana). In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from on 13 December 2019).