Copper-throated sunbird

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Copper-throated sunbird
Leptocoma calcostetha 220300516.jpg
male
Leptocoma calcostetha 101693876.jpg
female
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Passeriformes
Family: Nectariniidae
Genus: Leptocoma
Species:
L. calcostetha
Binomial name
Leptocoma calcostetha
(Jardine, 1842)
Synonyms

Nectarinia calcostetha

The copper-throated sunbird (Leptocoma calcostetha) is a small passerine within the Nectariniidae family. They sustain themselves by consuming nectar as well as small invertebrates. As a member of the Nectariniidae family, they possess downward curved beaks and have pectoral tufts of yellow feathers. They are found in south-eastern Asia, predominantly in coastal regions.

Contents

Taxonomy

The copper-throated sunbirds are within the Nectariniidae family, a grouping of sunbirds and spiderhunters. These birds are known for their nectarivorous diets, downward-curved beaks and colorful plumage. The copper-throated sunbird is within the small genus Leptocoma , which contains only 6 extant species. Leptocoma originates from the ancient Greek words leptos which means delicate or refined; and komē which means hair. In addition, the species name calcostetha originates from the words khalkos which means bronze; and stēthos which means breast. [2] Sunbird species can be found in Africa, Asia and Australia. The current consensus is that sunbirds originated and speciated within Asia, and then spread to other continents over time. [3]

Description

Copper-throated sunbirds are small sized birds ranging from 12.2–13 cm. A mature individual's wingspan averages 57.5mm, while their tails average 45.5mm. [4] Adult males are predominantly black birds with contrasting shimmering green on their heads, shoulders, upper back and rump; as well as a copper colored throat with an outer ring of shimmering purplish-blue that extends down to the chest. They possess black legs and black eyes with no eye ring. They boast a down-curved black beak and yellow pectoral tufts which is concealed beneath the wing; both of which are shared traits by many other species in the Nectariniidae family. [5] Additionally, adult females also have black legs and a down-curved black beak, but their eyes possess an incomplete white eye ring. Their undersides are olive-yellow whilst their backsides are grayish-olive. The iconic copper throat is replaced with a grayish-white color which contrasts their gray heads. Juveniles are similar to the females, however,  the grayish-white throats are swapped for a yellow one with occasional dark scaling.

Distribution and habitat

Copper-throated sunbirds’ distribution spans across south eastern Asia. [2] [6] They can be found in Singapore, Vietnam, Malaysia, the Philippines, Myanmar, Cambodia and western Indonesia (i.e. Java Island). They predominantly reside in coastal areas year-round rather than far into the mainland. Copper-throated sunbirds reside in artificial and forest habitat types. More specifically, their artificial habitats consist of plantations, coconut groves and rural gardens. Whereas, forest habitats consist of tropical lowlands, tropical mangroves, heath forests and alluvial forests. They are often found in flowering shrubs or trees, usually keeping themselves in the upper-middle stories of the canopy. [7]

Behavior

Diet

Copper-throated sunbirds are nectivorous and insectivorous species. They are highly active birds that dart from tree to tree looking for small arthropods and nectar. [7] Unlike their convergently evolved counterpart, the hummingbird, sunbirds have the ability to hover imperfectly long enough to consume nectar. However, they cannot do it continuously. [3] The only dietary preference documented for the copper-throated sunbirds is nectar from Bruguiera; a class of plants within the Rhizophoraceae family which can be found in mangroves in Africa, Asia and Australia. [2] As for arthropods, they are collected through means of gleaning through twigs and foliage.

Pollination

As a nectarivore, these birds as well as most sunbirds are important pollinators in their ecosystem. While collecting nectar, parts of their bodies graze the anthers of the flower: the male sexual organs of the flower which releases pollen. By traveling between multiple different flowers, they bring pollen straight to other female sexual organs which causes the plant to become fertilized. In some cases, it has been documented that sunbirds cause reduced reproductive success. It is common for birds to damage the flowers' reproductive organs, ruining their chances to become fertilized. [8]

Reproduction

Egg laying begins as early as January and finishes as late as July. [2] Typical clutch size is 2. The eggs are grayish-brown with dark spots. Nestlings start to appear around the month of July. Nest building is a cooperative effect between the male and the female. The nest is loosely woven into a pear-shaped structure using fine grass, fibers and hairs, rendering it camouflaged with the bark and leaves. It has a solid base and an oval entrance with an overhang. Occasionally, the parents build decoy nests, most likely to confuse predators and brood parasites such as cuckoos. Cuckoo species are brood parasites that often target sunbirds nests in Eastern Asia and Africa. [7]

Vocalization

Their songs are a melodious trill of fluctuating notes, sounding almost squeaky, broken up by brief pauses and a single sharp squeak. Their calls are squee- sound, that subtly decreases in pitch. No documentation could be found on copper-throated sunbirds' utilization of their vocalizations. [2]

Conservation Status

The copper-throated sunbird was classified as a species of least concern by the International Union for Conservation of Nature in October 2016. Although their populations are yet to be quantified, they have been deemed not uncommon. Due to the lack of evidence of declining populations and their large distribution range, it must indicate that their populations are stable. [6]

Related Research Articles

<span class="mw-page-title-main">Sunbird</span> Family of birds

Sunbirds and spiderhunters make up the family Nectariniidae of passerine birds. They are small, slender passerines from the Old World, usually with downward-curved bills. Many are brightly coloured, often with iridescent feathers, particularly in the males. Many species also have especially long tail feathers. Their range extends through most of Africa to the Middle East, South Asia, South-east Asia and southern China, to Indonesia, New Guinea and northern Australia. Species diversity is highest in equatorial regions.

<span class="mw-page-title-main">Garden sunbird</span> Species of bird

The garden sunbird, previously known as the olive-backed sunbird, is a species of passerine bird in the family Nectariniidae that is found in the Philippines except on the Palawan island group. It was formerly considered to be conspecific with seven other species: the ornate sunbird, Palawan sunbird, Sahul sunbird, Tukangbesi sunbird, Flores Sea sunbird, South Moluccan sunbird and the Mamberamo sunbird. It is a small, brightly coloured bird with olive-green plumage on the wings and back with a bright yellow chest. It has a long downward-curved bill it uses for taking nectar and capturing insects. It is primarily nectarivorous, but will take insects and spiders, particularly when feeding chicks.

<span class="mw-page-title-main">Spiderhunter</span> Genus of birds

The spiderhunters are birds of the genus Arachnothera, part of the sunbird family Nectariniidae. The genus contains thirteen species found in the forests of south and southeastern Asia. They are large representatives of the sunbird family, with drab plumage and long strongly curved bills. They feed on both nectar and a range of small arthropods.

<span class="mw-page-title-main">Crimson-backed sunbird</span> Species of bird

The crimson-backed sunbird or small sunbird is a sunbird endemic to the Western Ghats of India. Like other sunbirds, they feed mainly on nectar although they take insects, especially to feed their young. They are tiny birds that are resident and are found in forests but are particularly attracted to gardens at the edge of the forest where people grow suitable flower-bearing plants. They usually perch while taking nectar.

<span class="mw-page-title-main">Seychelles sunbird</span> Species of bird

The Seychelles sunbird is a small passerine from the sunbird family. It is named after the French explorer Jean-Jacques Dussumier. It is native to the Seychelles, where it is known as kolibri in Seychellois Creole. This bird is placed in the genus Cinnyris by some authorities and in Nectarinia by others. Although this bird has a limited range, it is described as common and has a stable population, so the International Union for Conservation of Nature has rated its conservation status as being of "least concern".

<span class="mw-page-title-main">Rwenzori double-collared sunbird</span> Species of bird

The Rwenzori double-collared sunbird, also called Stuhlmann's sunbird or the Rwanda double-collared sunbird, is a species of bird in the family Nectariniidae. It is found in the Ruwenzori range of mountains in south central Africa. Its natural habitat is subtropical or tropical dry forests. It is threatened by habitat loss. It is sometimes considered to be a subspecies of the greater double-collared sunbird. Some authors consider this bird to be part of a species complex with Cinnyris afer, where it joins Ludwig's double-collared sunbird and Prigogine's double-collared sunbird. As with other closely related species, each inhabiting different locations, there are subtle similarities and differences between the local populations, and their taxonomic treatment depends on the views of the taxonomist.

<span class="mw-page-title-main">Anchieta's sunbird</span> Species of bird

Anchieta's sunbird is a species of bird in the family Nectariniidae. It is found in Angola, the DRC, Malawi, Mozambique, Tanzania, and Zambia, and is named after José Alberto de Oliveira Anchieta.

<span class="mw-page-title-main">Brown-throated sunbird</span> Species of bird

The brown-throated sunbird, also known as the plain-throated sunbird, is a species of bird in the family Nectariniidae. It is found in a wide range of semi-open habitats in south-east Asia, ranging from Myanmar to the Lesser Sundas and west Philippines. The grey-throated sunbird found in the remaining part of the Philippines is often considered a subspecies of the brown-throated sunbird, but the two differ consistently in measurements and plumage, and there is no evidence of intergradation between them.

<span class="mw-page-title-main">Whitehead's spiderhunter</span> Species of bird endemic to Borneo

Whitehead's spiderhunter is a species of spiderhunter in the sunbird and spiderhunter family Nectariniidae. It is endemic to Borneo, where it is found in the mountain ranges in the north-central part of the island. It inhabits hill dipterocarp forest, primary and secondary montane forest, and forest edge at elevations of 930–3,000 m (3,050–9,840 ft). A large and distinctive spiderhunter, the species is mostly brown with profuse whitish streaking all over the body and bright yellow vents and uppertail coverts. Both sexes are similar in appearance, but males are larger, with a length of 16.5–18 cm (6.5–7.1 in) compared to a length of 15.5–16.5 cm (6.1–6.5 in) for females. The juvenile plumage is unknown.

<span class="mw-page-title-main">Little spiderhunter</span> Species of bird

The little spiderhunter is a species of long-billed nectar-feeding bird in the family Nectariniidae found in the moist forests of South and Southeast Asia. Unlike typical sunbirds, males and females are very similar in plumage. They are usually seen in ones or twos and frequently make a tzeck call. They are most often found near flowering plants where they obtain nectar.

<span class="mw-page-title-main">Streaked spiderhunter</span> Species of bird

The streaked spiderhunter is a species of bird in the family Nectariniidae.

<span class="mw-page-title-main">Black sunbird</span> Species of bird

The black sunbird is a species of bird in the family Nectariniidae. It is found in eastern Indonesia and New Guinea. Its natural habitats are subtropical or tropical moist lowland forest and subtropical or tropical mangrove forest.

<span class="mw-page-title-main">Olive-bellied sunbird</span> Species of bird

The olive-bellied sunbird is a species of bird in the family Nectariniidae. It is widely spread across the African tropical rainforest.

<span class="mw-page-title-main">Scarlet-tufted sunbird</span> Species of bird

The scarlet-tufted sunbird is a species of bird in the Nectarinia of the family Nectariniidae. It is found in Democratic Republic of the Congo, Kenya, Malawi, Rwanda, Tanzania, Uganda, and Zambia. It is also known as the red-tufted sunbird and the scarlet-tufted malachite sunbird.

<span class="mw-page-title-main">Eastern double-collared sunbird</span> Species of bird

The eastern double-collared sunbird is a species of bird in the family Nectariniidae. It is found in upland areas of Kenya and northern Tanzania.

<span class="mw-page-title-main">Tiny sunbird</span> Species of bird

The tiny sunbird is a species of bird in the family Nectariniidae. It is sparsely distributed across the African tropical rainforest.

Moreau's sunbird is a species of bird in the family Nectariniidae. It is endemic to Kilolo District of Morogoro Region in Tanzania where its natural habitat is subtropical or tropical moist montane forests. It is threatened by habitat loss and the International Union for Conservation of Nature has assessed it as being "near-threatened".

<span class="mw-page-title-main">Black-bellied sunbird</span> Species of bird

The black-bellied sunbird(Cinnyris nectarinioides) is a small sunbird located primarily in Africa. Two subspecies are recognized: the Cinnyris nectarinioides erlangeri, which is smaller and found in Ethiopia, Somalia, and Kenya; and the Cinnyris nectarinioides nectarinioides, which is larger and found in Kenya and Tanzania. This bird inhabits savannah, wetlands, and terrestrial freshwater areas.

<span class="mw-page-title-main">Neergaard's sunbird</span> Species of bird

Neergaard's sunbird is a species of bird in the family Nectariniidae. It is found in Mozambique and South Africa. Its natural habitat is subtropical or tropical dry forest near the coast, where it is threatened by habitat loss. It is named after Paul Neergaard, a Danish recruiting officer for the Wenela agency, who was stationed in southern Mozambique.

<span class="mw-page-title-main">Golden-winged sunbird</span> Species of bird

The golden-winged sunbird is a species of bird in the family Nectariniidae. Three subspecies are recognised. It is native to the Albertine Rift montane forests and East African montane forests.

References

  1. BirdLife International (2016). "Leptocoma calcostetha". IUCN Red List of Threatened Species . 2016: e.T22717794A94552451. doi: 10.2305/IUCN.UK.2016-3.RLTS.T22717794A94552451.en . Retrieved 12 November 2021.
  2. 1 2 3 4 5 Cheke, Robert; Mann, Clive (2020-03-04), Billerman, Shawn M.; Keeney, Brooke K.; Rodewald, Paul G.; Schulenberg, Thomas S. (eds.), "Copper-throated Sunbird (Leptocoma calcostetha)", Birds of the World, Cornell Lab of Ornithology, doi:10.2173/bow.cotsun2.01, S2CID   216206426 , retrieved 2023-10-19
  3. 1 2 Barnes, Keith; Behrens, Ken (2016-12-31). Birds of Kruger National Park. Princeton University Press. doi:10.1515/9781400880683. ISBN   978-1-4008-8068-3. S2CID   184852173.
  4. "Descriptions of new East Indian Nectariniidae". Journal of the Washington Academy of Sciences. 13: 226–232. 1923. doi:10.5962/bhl.part.5296. ISSN   0043-0439.
  5. Yom-Tov, Yoram (September 2002). "Sunbirds: A Guide to the Sunbirds, Flowerpeckers, Spiderhunters, and Sugarbirds of the World. By Robert A Cheke and, Clive F Mann; illustrated by, Richard Allen. New Haven (Connecticut): Yale University Press $50.00. 384 p; ill.; index. ISBN 0-300– 08940–6. 2001". The Quarterly Review of Biology. 77 (3): 340–341. doi:10.1086/345222. ISSN   0033-5770.
  6. 1 2 IUCN (2016-10-01). Leptocoma calcostetha: BirdLife International: The IUCN Red List of Threatened Species 2016: e.T22717794A94552451 (Report). International Union for Conservation of Nature. doi: 10.2305/iucn.uk.2016-3.rlts.t22717794a94552451.en . Retrieved 19 October 2023.
  7. 1 2 3 Morris, Pat (July 2013). "A Field Guide to the Birds of Peninsular Malaysia and Singapore (Second Edition) by Allen Jeyarajasingam & Alan Pearson. Oxford: Oxford University Press, 2012. ISBN 978-0-19-963943-4. Paperback. £34.95". Zoological Journal of the Linnean Society. 168 (3): 669. doi: 10.1111/zoj.12028 . ISSN   0024-4082.
  8. FUJITA, Kaoru (2000). "Nectar Robbing by the Purple-rumped Sunbird Nectarinia zeylonica from Introduced Flowers in Sri Lanka". Japanese Journal of Ornithology. 49 (4): 185–187. doi: 10.3838/jjo.49.185 . ISSN   0913-400X.