The violet-throated metaltail (''Metallura baroni''), locally called metalura gorjivioleta, is an

Endangered An endangered species is a species that is very likely to become extinct in the near future, either worldwide or in a particular political jurisdiction. Endangered species may be at risk due to factors such as habitat loss, poaching and in ...

species of hummingbird in the "coquettes", tribe

Lesbiini Lesbiini is one of the two tribes that make up the subfamily Lesbiinae in the hummingbird family Trochilidae. The other tribe is Heliantheini (brilliants). The informal name "coquettes" has been proposed for this group as the largest genus, ''L ...

of subfamily

Lesbiinae Lesbiinae is one of the six subfamilies that make up the hummingbird family Trochilidae. The subfamily is divided into two tribes: Heliantheini ("brilliants") containing 14 genera and Lesbiini ("coquettes") containing 18 genera. Phylogeny A mo ...

. It is

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 ...

Ecuador Ecuador ( ; ; Quechua: ''Ikwayur''; Shuar: ''Ecuador'' or ''Ekuatur''), officially the Republic of Ecuador ( es, República del Ecuador, which literally translates as "Republic of the Equator"; Quechua: ''Ikwadur Ripuwlika''; Shuar: ' ...

.HBW and BirdLife International (2020) ''Handbook of the Birds of the World and BirdLife International digital checklist of the birds of the world'' Version 5. Available at: http://datazone.birdlife.org/userfiles/file/Species/Taxonomy/HBW-BirdLife_Checklist_v5_Dec20.zip xls zipped 1 MBretrieved 27 May 2021

Taxonomy and systematics

The violet-throated metaltail is

monotypic In biology, a monotypic taxon is a taxonomic group (taxon) that contains only one immediately subordinate taxon. A monotypic species is one that does not include subspecies or smaller, infraspecific taxa. In the case of genera, the term "unispe ...

. At one time it was treated as a subspecies of what is now the fiery-throated metaltail (''Metallura odomae'').Remsen, J. V., Jr., J. I. Areta, E. Bonaccorso, S. Claramunt, A. Jaramillo, D. F. Lane, J. F. Pacheco, M. B. Robbins, F. G. Stiles, and K. J. Zimmer. Version 31 January 2022. A classification of the bird species of South America. American Ornithological Society. https://www.museum.lsu.edu/~Remsen/SACCBaseline.htm retrieved February 1, 2022

Description

The violet-throated metaltail is long. Males weigh and females . It has a medium length, straight, black bill. The adult male has dark olive green upper- and underparts. Its

gorget A gorget , from the French ' meaning throat, was a band of linen wrapped around a woman's neck and head in the medieval period or the lower part of a simple chaperon hood. The term later described a steel or leather collar to protect the th ...

is purple-violet. Its slightly forked tail is iridescent violaceous sky blue on its upper side and glittering yellow-green on its underside. The adult female's upperparts are also dark olive green. Its throat is a duller version of the male's and its breast, and belly are whitish gray spotted with olive green. Its outer tail feathers have whitish tips on their underside. Juveniles are similar to adult females.Heindl, M., E. de Juana, P. F. D. Boesman, G. M. Kirwan, and C. J. Sharpe (2020). Violet-throated Metaltail (''Metallura baroni''), version 1.0. In Birds of the World (J. del Hoyo, A. Elliott, J. Sargatal, D. A. Christie, and E. de Juana, Editors). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi.org/10.2173/bow.vitmet1.01

Distribution and habitat

The violet-throated metaltail is found only on the Cajas Plateau west of the city of

Cuenca, Ecuador Santa Ana de los Cuatro Ríos de Cuenca, commonly referred to as Cuenca ( Kichwa: ''Tumipampa'') is the capital and largest city of the Azuay Province of Ecuador. Cuenca is located in the highlands of Ecuador at about above sea level, with an ur ...

. The plateau straddles the border of

Azuay Azuay (), Province of Azuay is a province of Ecuador, created on 25 June 1824. It encompasses an area of . Its capital is Cuenca. It is located in the south center of Ecuador in the highlands. Its mountains reach above sea level in the natio ...

and Cañar provinces. It inhabits the edges of

elfin forest Dwarf forest, elfin forest, or pygmy forest is an uncommon ecosystem featuring miniature trees, inhabited by small species of fauna such as rodents and lizards. They are usually located at high elevations, under conditions of sufficient air hu ...

and ''

Polylepis ''Polylepis'' is a genus comprising 28 recognised shrub and tree species, that are endemic to the mid- and high-elevation regions of the tropical Andes. This group is unique in the rose family in that it is predominantly wind-pollinated. They are ...

'' woodlands and adjacent '' páramo'' grasslands. Its favored landscape is characterized by boulders with a cover of bromeliads,

Ericaceae The Ericaceae are a family of flowering plants, commonly known as the heath or heather family, found most commonly in acidic and infertile growing conditions. The family is large, with c.4250 known species spread across 124 genera, making it th ...

, and ferns and mosses. In elevation it normally ranges between but was once reported as low as .

Behavior

Movement

The violet-throated metaltail's movements, if any, have not been documented, but some seasonal elevational movement is thought possible.

Feeding

The violet-throated metaltail forages for nectar by hovering; it feeds on a variety of flowering vegetation at any level of its habitat. Males defend feeding territories.

Breeding

The violet-throated metaltail is thought to nest between November and February. One nest was described as resembling a slipper without a heel; it was made of moss, twigs, and wool. The female incubates the clutch of two white eggs; the incubation and nestling periods are not known.

Vocalization

A violet-throated metaltail vocalization has been described as "a descending series of 3–5 squeaky notes, followed by several jumbled ones, 'trsee-seee-seee-sew..trr-tsee-tse-tsew..trr-tsee-tse-tsew'." It is thought to be either a song or a chasing call.

Status

The IUCN originally assessed the violet-throated metaltail as Threatened. The assessement was changed to Vulnerable in 1994 and to the present Endangered in 2000. Its population is estimated at fewer than 1700 mature individuals and is believed to be decreasing. Its range includes

El Cajas National Park El Cajas National Park or Cajas National Park ( es, Parque Nacional El Cajas) is a national park in the highlands of Ecuador. It is located about 30 km west from Cuenca, the capital of the province of Azuay. The area of 285.44 km2 ...

and the small adjoining Río Mazán reserve. However, outside those areas and even within the national park its habitat is under threat by burning to create pasture.

References

{{Taxonbar, from=Q1269438 violet-throated metaltail Birds of the Ecuadorian Andes Endemic birds of Ecuador violet-throated metaltail violet-throated metaltail Taxonomy articles created by Polbot