The streamertails are

hummingbird Hummingbirds are birds native to the Americas and comprise the biological family Trochilidae. With about 361 species and 113 genera, they occur from Alaska to Tierra del Fuego, but the vast majority of the species are found in the tropics aro ...

s in the

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial nomencla ...

''Trochilus'', that are

endemic Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found else ...

Jamaica Jamaica (; ) is an island country situated in the Caribbean Sea. Spanning in area, it is the third-largest island of the Greater Antilles and the Caribbean (after Cuba and Hispaniola). Jamaica lies about south of Cuba, and west of Hispanio ...

. It is the

type genus In biological taxonomy, the type genus is the genus which defines a biological family and the root of the family name. Zoological nomenclature According to the International Code of Zoological Nomenclature, "The name-bearing type of a nominal ...

of the

family Family (from la, familia) is a group of people related either by consanguinity (by recognized birth) or affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its members and of society. Ideall ...

Trochilidae Hummingbirds are birds native to the Americas and comprise the biological family Trochilidae. With about 361 species and 113 genera, they occur from Alaska to Tierra del Fuego, but the vast majority of the species are found in the tropics arou ...

. Today most authorities consider the two

taxa In biology, a taxon (back-formation from ''taxonomy''; plural taxa) is a group of one or more populations of an organism or organisms seen by taxonomists to form a unit. Although neither is required, a taxon is usually known by a particular nam ...

in this genus as separate species, but some (e.g. AOU) continue to treat them as

conspecific Biological specificity is the tendency of a characteristic such as a behavior or a biochemical variation to occur in a particular species. Biochemist Linus Pauling stated that "Biological specificity is the set of characteristics of living organis ...

, in which case ''scitulus'' is a

subspecies In biological classification, subspecies is a rank below species, used for populations that live in different areas and vary in size, shape, or other physical characteristics (morphology), but that can successfully interbreed. Not all species ...

of ''T. polytmus''. A wide range of

common name In biology, a common name of a taxon or organism (also known as a vernacular name, English name, colloquial name, country name, popular name, or farmer's name) is a name that is based on the normal language of everyday life; and is often contrast ...

s apply to this combined species, including green-and-black streamertail, Jamaican streamertail or simply streamertail. The name ''streamertail'' is a reference to the greatly elongated

rectrices Flight feathers (''Pennae volatus'') are the long, stiff, asymmetrically shaped, but symmetrically paired pennaceous feathers on the wings or tail of a bird; those on the wings are called remiges (), singular remex (), while those on the tai ...

of the males.

Taxonomy and species list

The genus ''Trochilus'' was introduced in 1758 by the Swedish naturalist Carl Linnaeus in the tenth edition of his ''

Systema Naturae ' (originally in Latin written ' with the ligature æ) is one of the major works of the Swedish botanist, zoologist and physician Carl Linnaeus (1707–1778) and introduced the Linnaean taxonomy. Although the system, now known as binomial nom ...

''. The genus name is from the Ancient Greek τροχιλος/''trokhilos'', a small unidentified bird mentioned by Aristotle. Later authors assumed the word referred to a wren. The

type species In zoological nomenclature, a type species (''species typica'') is the species name with which the name of a genus or subgenus is considered to be permanently taxonomically associated, i.e., the species that contains the biological type specimen( ...

was subsequently designated as the red-billed streamertail. In his ''Systema Naturae'' Linnaeus included 18 species of hummingbird all of which he placed in ''Trochilus''. Today, 12 of these species are still recognised, but only the red-billed streamertail is retained in its original genus. Two species are now placed in the genus.

References

* Schuchmann, K. L. (1999). Genus Trochilus. Pp. 572 in: del Hoyo, J., Elliott, A., & Sargatal, K. eds. (1999). ''Handbook of the Birds of the World.''. Vol. 5. Barn-owls to Hummingbirds. Lynx Edicions, Barcelona. Higher-level bird taxa restricted to the West Indies Endemic fauna of Jamaica Taxonomy articles created by Polbot {{hummingbird-stub