Racket-tailed roller

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Racket-tailed roller
Coracias spatulatusPCCA20071227-8449B.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Coraciiformes
Family: Coraciidae
Genus: Coracias
Species:
C. spatulatus
Binomial name
Coracias spatulatus
Trimen, 1880
Racket-tailed roller distribution map.svg
Geographic distribution shown in green
Synonyms
  • Coracias spatulata

The racket-tailed roller (Coracias spatulatus) is a species of bird in the family Coraciidae. It is found in southern Africa from Angola, south-eastern Democratic Republic of Congo and southern Tanzania to northern Botswana, Zimbabwe, Malawi and Mozambique.

Contents

Taxonomy and systematics

The racket-tailed roller was formally described in 1880 by the naturalist Roland Trimen under its current binomial name Coracias spatulatus from a specimen collected near the Zambezi River in southern Africa. [2] The specific epithet spatulatus is Modern Latin meaning "spatulate" or "spoon-shaped". [3] The species is monotypic: no subspecies are recognised. [4] A molecular phylogenetic study published in 2018 found that the racket-tailed roller was most closely related to the purple roller (Coracias naevius). [5]

The phylogenetic relationships among the Coracias species are shown below, from the the molecular study by Johansson et al. (2018) [5]

Coracias

Blue-bellied rollerC. cyanogaster

Purple rollerC. naevius

Racket-tailed rollerC. spatulatus

Indian rollerC. benghalensis

Indochinese rollerC. affinis

Purple-winged rollerC. temminckii

Lilac-breasted rollerC. caudatus

Abyssinian rollerC. abyssinicus

European rollerC. garrulus

Alternate names for the racket-tailed roller include the Angola racket-tailed roller and Weigall's roller.

Description

The racket-tailed roller is so named for the conspicuous elongated outer feathers on its tail which have long streamers ending in paddle-shaped tips. The bird is 28 to 30 cm (11 to 12 in) long with the streamers extending another 8 cm (3 in). The forehead and superciliary streak are white, the crown dull green, the back rufous and the tail blue. The underparts are pale blue with whitish streaking. In flight, the purple upper wing with its azure-blue stripe can be seen. The under wing is pale blue with a purplish-black trailing edge and tip. The bird somewhat resembles the European roller (Coracias garrulus) and the lilac-breasted roller (Coracias caudatus), but those species lack the distinctive tail streamers. The beak is black, the eye brownish and the legs are dull yellowish. The juvenile is similar to the adult but less vivid, and lacks the attenuated tail feathers. The voice is a harsh guttural shriek, uttered as it swoops down. [6]

Behaviour and ecology

Similar to other members of Coracias , this species hunts for prey from a perch in the mid-storey region of woodland. When it spots something edible on the forest floor it swoops down to grab the prey. The diet consists mainly of grasshoppers, beetles, insect larvae, scorpions and small lizards. This roller is usually a solitary bird or occurs in pairs, but may form small groups of six or seven birds. It is a territorial species, driving away intruders by rocketing from a height with a raucous screech, rolling from side to side as it levels off, before using its momentum to rise to a perch. [6] It nests in a cavity in a tree trunk or branch about 7 m (23 ft) off the ground, often using a disused nest of a woodpecker or barbet. The clutch is laid in the unlined cavity and usually consists of three or four eggs, but little is known of the nesting habits of this species. [6]

Status

The racket-tailed roller is a fairly common species with a very wide range. The population trend is thought to be declining because of loss of the forest habitat, especially miombo and mopane woodland. However, no particular threats have been identified and the International Union for Conservation of Nature has assessed the bird's conservation status as being of "least concern". [1]

Related Research Articles

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

Coraciidae is a family of Old World birds, which are known as rollers because of the aerial acrobatics some of these birds perform during courtship or territorial flights. Rollers resemble crows in size and build, and share the colourful appearance of kingfishers and bee-eaters, blues and pinkish or cinnamon browns predominating. The two inner front toes are connected, but not the outer one.

<span class="mw-page-title-main">European roller</span> Species of bird

The European roller is the only member of the roller family of birds to breed in Europe. Its overall range extends into the Middle East, Central Asia and the Maghreb.

<span class="mw-page-title-main">Indian roller</span> Species of bird

The Indian roller is a bird of the family Coraciidae. It is 30–34 cm (12–13 in) long with a wingspan of 65–74 cm (26–29 in) and weighs 166–176 g (5.9–6.2 oz). The face and throat are pinkish, the head and back are brown, with blue on the rump and contrasting light and dark blue on the wings and tail. The bright blue markings on the wing are prominent in flight. The sexes are similar in appearance. Two subspecies are recognised.

<span class="mw-page-title-main">Abyssinian roller</span> Species of bird

The Abyssinian roller, or Senegal roller, is a member of the roller family of birds which breeds across tropical Africa in a belt south of the Sahara, known as the Sahel. It is resident in the southern part of its range, but northern breeding populations are short-distance migrants, moving further south after the wet season.

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

The blue-bellied roller is a member of the roller family of birds which breeds across Africa in a narrow belt from Senegal to northeast Democratic Republic of the Congo. It is resident, apart from some local seasonal movements, in mature moist savannah dominated by Isoberlinia trees.

<i>Eurystomus</i> Genus of birds

Eurystomus is a genus of roller, one of the two genera in that family of birds. The name means ‘broad mouth’, from the Greek eurus and stoma.

<span class="mw-page-title-main">Malachite kingfisher</span> Species of bird

The malachite kingfisher is a river kingfisher which is widely distributed in Africa south of the Sahara. It is largely resident except for seasonal climate-related movements.

<i>Coracias</i> Genus of birds

Coracias is a genus of the rollers, an Old World family of near passerine birds related to the kingfishers and bee-eaters. They share the colourful appearance of those groups, blues and browns predominating. The two outer front toes are connected, but not the inner one.

<span class="mw-page-title-main">Oriental dollarbird</span> Species of bird

The Oriental dollarbird is a bird of the roller family, so named because of the distinctive pale blue or white, coin-shaped spots on its wings. It can be found from Australia to Korea, Japan and India.

<span class="mw-page-title-main">Lilac-breasted roller</span> Species of bird

The lilac-breasted roller is an African bird of the roller family, Coraciidae. It is widely distributed in Southern and Eastern Africa, and is a vagrant to the southern Arabian Peninsula. It prefers open woodland and savanna, and it is for the most part absent from treeless places. Usually found alone or in pairs, it perches at the tops of trees, poles or other high vantage points from where it can spot insects, amphibians and small birds moving about on the ground. Nesting takes place in a natural hole in a tree where a clutch of 2–4 eggs are laid, and incubated by both parents, who are extremely aggressive in defence of their nest, taking on raptors and other birds. During the breeding season the male will rise to a fair height, descending in swoops and dives, while uttering harsh, discordant cries. The sexes do not differ in coloration, and juveniles lack the long tail streamers of adults. This species is unofficially considered the national bird of Kenya. Alternative names for the lilac-breasted roller include the fork-tailed roller, lilac-throated roller and Mosilikatze's roller.

<span class="mw-page-title-main">Biak paradise kingfisher</span> Species of bird

The Biak paradise kingfisher is a tree kingfisher that is endemic to the Indonesian island of Biak which is one of a small group of islands located in Cenderawasih Bay near the northern coast of Papua. This bird has a turquoise-blue back with a white belly and tail streamers and a reddish beak. Its natural habitat is forests and the IUCN has assessed its conservation status as being "near-threatened".

<span class="mw-page-title-main">Purple roller</span> Species of bird

The purple roller, or rufous-crowned roller, is a medium-sized bird widespread in sub-Saharan Africa. Compared with other rollers its colours are rather dull and its voice harsh and grating.

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

The purple-winged roller is a species of bird in the family Coraciidae. It is endemic to the Sulawesi subregion in Indonesia and can be found on the islands of Sulawesi, Bangka, Lembeh, Manterawu, Muna and Butung.

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

The blue-throated roller is a species of roller in the family Coraciidae. It is native to the African tropical rainforest.

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

The chocolate-backed kingfisher is a species of kingfisher in the subfamily Halcyoninae which occurs in western Sub-Saharan Africa.

<span class="mw-page-title-main">Striped kingfisher</span> Species of bird

The striped kingfisher is a species of bird in the tree kingfisher subfamily. It was first described by Edward, Lord Stanley, in Salt's Voyage to Abyssinia in 1814 as "Chelicut kingfisher" Alaudo Chelicuti.

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

The black-headed bee-eater is a species of bird in the family Meropidae. It is found in forests in tropical Central and West Africa, its range including Angola, Central African Republic, Republic of the Congo, Democratic Republic of the Congo, Ivory Coast, Gabon, Ghana, Nigeria, and South Sudan.

<span class="mw-page-title-main">Rosy bee-eater</span> Species of bird

The rosy bee-eater is a species of bird in the family Meropidae. It is found in Angola, Benin, Burkina Faso, Republic of the Congo, Democratic Republic of the Congo, Ivory Coast, Equatorial Guinea, Gabon, Ghana, Nigeria, and Togo.

<span class="mw-page-title-main">Indochinese roller</span> Species of bird

The Indochinese roller or Burmese roller, is a member of the roller bird family. It occurs widely from Nepal, eastern India to Myanmar and Southeast Asia. It is listed as Least Concern on the IUCN Red List.

<span class="mw-page-title-main">Broad-billed roller</span> Species of bird

The broad-billed roller is a member of the roller family of birds which breeds across tropical Africa and Madagascar in all but the driest regions. It is a wet season breeder, which migrates from the northern and southern areas of its range towards the moister equatorial belt in the dry season.

References

  1. 1 2 BirdLife International (2016). "Coracias spatulatus". IUCN Red List of Threatened Species . 2016: e.T22682883A92966925. doi: 10.2305/IUCN.UK.2016-3.RLTS.T22682883A92966925.en . Retrieved 16 November 2021.
  2. Trimen, Roland (1880). "On a new species of roller (Coracias) from the Zambesi". Proceedings of the Zoological Society of London. Part 1: 31–33.
  3. Jobling, James A. (2010). The Helm Dictionary of Scientific Bird Names. London: Christopher Helm. p. 361. ISBN   978-1-4081-2501-4.
  4. Gill, Frank; Donsker, David; Rasmussen, Pamela, eds. (January 2021). "Rollers, ground rollers, kingfishers". IOC World Bird List Version 11.1. International Ornithologists' Union. Retrieved 22 April 2021.
  5. 1 2 Johansson, U. S.; Irestedt, M.; Qu, Y.; Ericson, P. G. P. (2018). "Phylogenetic relationships of rollers (Coraciidae) based on complete mitochondrial genomes and fifteen nuclear genes". Molecular Phylogenetics and Evolution. 126: 17–22. doi:10.1016/j.ympev.2018.03.030. PMID   29631051. S2CID   5011292.
  6. 1 2 3 Fry, C. Hilary; Fry, Kathie (2010). Kingfishers, Bee-eaters and Rollers. Bloomsbury Publishing. pp. 292–294. ISBN   978-1-4081-3525-9.