The golden-tailed starfrontlet (''Coeligena eos'') is a species of

hummingbird Hummingbirds are birds native to the Americas and comprise the Family (biology), biological family Trochilidae. With approximately 366 species and 113 genus, genera, they occur from Alaska to Tierra del Fuego, but most species are found in Cen ...

in the "brilliants", tribe

Heliantheini Heliantheini is one of the two Tribe (biology), tribes that make up the subfamily Lesbiinae of the hummingbird family (biology), family Trochilidae. The other tribe in the subfamily is Lesbiini. The informal name "brilliants" has been proposed f ...

in 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 mol ...

. It is endemic to

Venezuela Venezuela, officially the Bolivarian Republic of Venezuela, is a country on the northern coast of South America, consisting of a continental landmass and many Federal Dependencies of Venezuela, islands and islets in the Caribbean Sea. It com ...

. It is also called the Merida starfrontlet and golden starfrontlet.HBW and BirdLife International (2022) Handbook of the Birds of the World and BirdLife International digital checklist of the birds of the world. Version 7. Available at: http://datazone.birdlife.org/userfiles/file/Species/Taxonomy/HBW-BirdLife_Checklist_v7_Dec22.zip retrieved December 13, 2022Clements, J. F., T. S. Schulenberg, M. J. Iliff, T. A. Fredericks, J. A. Gerbracht, D. Lepage, S. M. Billerman, B. L. Sullivan, and C. L. Wood. 2022. The eBird/Clements checklist of birds of the world: v2022. Downloaded from https://www.birds.cornell.edu/clementschecklist/download/ retrieved November 10, 2022

Taxonomy and systematics

The golden-bellied starfrontlet and most other members of genus ''Coeligena'' were at one time placed in genus ''Helianthea'' but have been in their current placement since the mid-1900s.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 30 January 2023. A classification of the bird species of South America. American Ornithological Society. https://www.museum.lsu.edu/~Remsen/SACCBaseline.htm retrieved January 30, 2023 The

International Ornithological Committee The International Ornithologists' Union (IOU) is an international organization for the promotion of ornithology. It links basic and applied research and nurtures education and outreach activities. Specifically, the IOU organizes and funds global co ...

(IOC), the

Clements taxonomy ''The Clements Checklist of Birds of the World'' is a book by Jim Clements which presents a list of the bird species of the world. The most recent printed version is the sixth edition (2007), but has been updated yearly, the last version in 202 ...

, and

BirdLife International BirdLife International is a global partnership of non-governmental organizations that strives to conserve birds and their habitats. BirdLife International's priorities include preventing extinction of bird species, identifying and safeguarding i ...

's ''

Handbook of the Birds of the World The ''Handbook of the Birds of the World'' (HBW) is a multi-volume series produced by the Spanish publishing house Lynx Edicions in partnership with BirdLife International. It is the first handbook to cover every known living species of bird. ...

'' recognize the golden-tailed starfrontlet as a

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 "unisp ...

species, though each gives it a different English name. The South American Classification Committee of the

American Ornithological Society The American Ornithological Society (AOS) is an ornithological organization based in the United States. The society was formed in October 2016 by the merger of the American Ornithologists' Union (AOU) and the Cooper Ornithological Society. Its ...

(SACC) considers it to be a subspecies of the golden-bellied starfrontlet (''C. bonapartei'') but is seeking a proposal to elevate it to species status.

Description

The golden-tailed starfrontlet is about long including its bill. Males weigh about of and females . Both sexes have a white spot behind the eye. Adult males have a blackish crown with a glittering green forehead. Their upper back is shining golden green that transitions to the gold to golden orange rump. The throat and breast are glittering green and the throat has a small violet patch. The rest of the underparts are variable, from glittering coppery red to reddish gold. The undertail

coverts A covert feather or tectrix on a bird is one of a set of feathers, called coverts (or ''tectrices''), which cover other feathers. The coverts help to smooth airflow over the wings and tail. Ear coverts The ear coverts are small feathers behind t ...

are light cinnamon. The wings are dark with a rufous patch on the

tertials 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 ...

. The slightly forked tail is rufous or cinnamon tipped with golden bronze. The adult female's forehead is plain green; the rest of the upperparts are colored like the male's but are duller. The throat is plain cinnamon buff and has green spots on its sides. The breast is mottled buff and green. The rest of the underparts are mostly cinnamon with a fiery gold belly and a coppery gold vent area.Palacios, C. (2022). Merida Starfrontlet (''Coeligena eos''), version 1.0. In Birds of the World (N. D. Sly and S. M. Billerman, Editors). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi.org/10.2173/bow.gobsta4.01 retrieved February 1, 2023

Distribution and habitat

The golden-tailed starfrontlet is found in the Andes of western Venezuela between the states of

Lara Lara may refer to: People * Lara (name), can be a given name or a surname in several languages * Lara (mythology), a naiad nymph, daughter of the river Almo in Ovid's ''Fasti'' Places *Lara (state), a state in Venezuela * Electoral district ...

and

Táchira Táchira State (, ) is one of the 23 States of Venezuela, states of Venezuela. The state capital is San Cristóbal, Táchira, San Cristóbal. Táchira State covers a total surface area of and as of the 2011 census, had a population of 1,168,9 ...

. It primarily inhabits the interior and edges of humid

montane forest Montane ecosystems are found on the slopes of mountains. The alpine climate in these regions strongly affects the ecosystem because temperatures lapse rate, fall as elevation increases, causing the ecosystem to stratify. This stratification is ...

. It also occurs in

dwarf forest file:Hamiguitan bonsai tree.JPG, A "natural bonsai" in the Mount Hamiguitan List of national parks of the Philippines, National Park in the Philippines, a UNESCO World Heritage Site file:Mount Kemiri (8187817161).jpg, An elfin forest in Sumatra ...

and more open landscapes with scattered vegetation. In elevation it ranges from .

Behavior

Movement

The golden-tailed starfrontlet apparently moves to higher elevation during the rainy season.

Feeding

The golden-tailed starfrontlet gathers nectar from long tubular flowers, usually of low to medium height. It has been observed feeding at

Ericaceae The Ericaceae () are a Family (biology), 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 about 4,250 known species spread acros ...

and at plants of genera ''

Centropogon ''Centropogon'' is a plant genus in the family (biology), family Campanulaceae. In systems where the Lobeliaceae are recognized as distinct, ''Centropogon'' is placed there. Selected species * ''Centropogon aequatorialis'' * ''Centropogon alb ...

'' and ''

Fuchsia ''Fuchsia'' ( ) is a genus of flowering plants that consists mostly of shrubs or small trees. Almost 110 species of ''Fuchsia'' are recognized; the vast majority are native to South America, but a few occur north through Central America to Mex ...

''. In addition to feeding on nectar it captures small

arthropod Arthropods ( ) are invertebrates in the phylum Arthropoda. They possess an arthropod exoskeleton, exoskeleton with a cuticle made of chitin, often Mineralization (biology), mineralised with calcium carbonate, a body with differentiated (Metam ...

s by gleaning from foliage, hovering, and by hawking.

Breeding

The golden-tailed starfrontlet's breeding season appears to be from January to March. It makes a cup nest of moss, lichens, and rootlets lined with softer plant material, and typically attaches it to a vertical branch within vegetation. Nothing else is known about its breeding biology.

Vocalization

As of early 2023 neither

xeno-canto xeno-canto is a citizen science project and repository in which volunteers record, upload and annotate recordings of bird calls and sounds of orthoptera and bats. Since it began in 2005, it has collected over 575,000 sound recordings from more th ...

nor the

Cornell Lab of Ornithology The Cornell Lab of Ornithology is a member-supported unit of Cornell University in Ithaca, New York, which studies birds and other wildlife. It is housed in the Imogene Powers Johnson Center for Birds and Biodiversity in Sapsucker Woods Sanctuar ...

Macaulay Library The Macaulay Library is the world's largest archive of animal media. It includes more than 71 million photographs, 2.6 million audio recordings, and over three hundred thousand videos covering 96 percent of the world's bird species. There are an ev ...

had any recordings of the golden-tailed starfrontlet's vocalizations.

Status

The

IUCN The International Union for Conservation of Nature (IUCN) is an international organization working in the field of nature conservation and sustainable use of natural resources. Founded in 1948, IUCN has become the global authority on the status ...

has assessed the golden-tailed starfrontlet as being of Least Concern. It has a small range and an unknown population size that is believed to be decreasing. No immediate threats have been identified. Its "distribution coincides with areas of new human settlements and areas of interest for minerals exploitation."

References

{{Taxonbar, from=Q21251099 golden-tailed starfrontlet golden-tailed starfrontlet Birds of the Venezuelan Andes Endemic birds of Venezuela Taxonomy articles created by Polbot