The guanacaste hummingbird or Alfero's hummingbird (''Amazilia alfaroana'') is a possibly

extinct Extinction is the termination of a kind of organism or of a group of kinds (taxon), usually a species. The moment of extinction is generally considered to be the death of the last individual of the species, although the capacity to breed and ...

species of hummingbird known only from a holotype collected in 1895 at the Miravalles Volcano in

Costa Rica Costa Rica (, ; ; literally "Rich Coast"), officially the Republic of Costa Rica ( es, República de Costa Rica), is a country in the Central American region of North America, bordered by Nicaragua to the north, the Caribbean Sea to the no ...

Taxonomy

It is usually treated as a subspecies of the Indigo-capped hummingbird or a hybrid between two unknown hummingbird species, but analysis of the holotype suggests it is its own species.

Conservation

It is possibly extinct, but the ecological stability of the area where the specimen was found indicates a possible undiscovered population still existing. The

IUCN The International Union for Conservation of Nature (IUCN; officially International Union for Conservation of Nature and Natural Resources) is an international organization working in the field of nature conservation and sustainable use of natu ...

classifies it as critically endangered.

References

{{Hummingbird-stub Controversial hummingbird taxa Amazilia Endemic birds of Costa Rica Birds described in 1896 Species known from a single specimen