Blue-bellied roller | |
---|---|
Pair in The Gambia | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Aves |
Order: | Coraciiformes |
Family: | Coraciidae |
Genus: | Coracias |
Species: | C. cyanogaster |
Binomial name | |
Coracias cyanogaster Cuvier, 1816 | |
Geographic distribution shown in green |
The blue-bellied roller (Coracias cyanogaster) 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.
The blue-bellied roller was given the binomial name Coracias cyanogaster in 1816 by the French naturalist Georges Cuvier based on "Le Rollier à ventre bleu" that had been described and illustrated by François Levaillant in 1806. [2] [3] The specific epithet combines the Ancient Greek kuanos meaning "dark-blue" with gastēr meaning "belly". [4] Levaillant mistaken believed that the specimen had been collected on the island of Java. [3] The species is resident in West-Africa and the type location was later designated as Senegal. [5] The species is monotypic: no subspecies are recognised. [6]
The phylogenetic relationships among the Coracias species are shown below, from the the molecular study by Johansson et al. (2018) [7]
Coracias |
| ||||||||||||||||||||||||||||||||||||||||||||||||
The blue-bellied roller is a large bird, nearly the size of a jackdaw at 28–30 cm (11–12 in). It has a very dark brown back, buffy or chalky white head, neck and breast, with the rest of the plumage mainly blue. Adults have 6 cm (2.4 in) tail streamers. Sexes are similar, but the juvenile is a drabber version of the adult. [8]
The blue-bellied roller is striking in its strong direct flight, with the brilliant blues of the wings contrasting with the dark back and cream colored head, and the tail streamers trailing behind. [8]
The call of blue-bellied roller is a harsh clicking ga-ga-ga sound. [8]
This is a common bird of warm open country with some trees. These rollers often perch prominently on trees, posts, or overhead wires, like giant shrikes, whilst watching for the grasshoppers and other large insects on which they feed.
The display of this bird is a lapwing-like display, with the twists and turns that give this species its English name. It nests in a hole in a tree - a tree cavity.
Widespread and common throughout its large range, the blue-bellied roller is evaluated as Least Concern on the IUCN Red List of Threatened Species. [1]
The blue-bellied roller is kept in some zoos, open air aviaries and similar educational facilities. There are instances of the bird escaping captivity and adjusting to the local environment. In Nepalganj area of Joka, Kolkata, two blue-bellied rollers have been spotted since May 2023 that have adapted to the local environment. [9] [10]
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.
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.
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.
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.
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.
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.
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.
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.
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.
The African pygmy kingfisher is a small insectivorous kingfisher found in the Afrotropics, mostly in woodland habitats.
The maroon-bellied parakeet is a small parrot found from southeastern Brazil to north-eastern Argentina, including eastern Paraguay and Uruguay. It is also known as the reddish-bellied parakeet, and in aviculture it is usually referred to as the maroon-bellied conure, reddish-bellied conure or brown-eared conure.
The collared kingfisher is a medium-sized kingfisher belonging to the subfamily Halcyoninae, the tree kingfishers. It is also known as the white-collared kingfisher, black-masked kingfisher or mangrove kingfisher. It has a wide range extending from the Red Sea across southern Asia to Polynesia. A number of subspecies and subspecies groups have been split from this species including the Pacific kingfisher, the islet kingfisher, the Torresian kingfisher, the Mariana kingfisher, and the Melanesian kingfisher.
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.
The violet-backed starling, also known as the plum-coloured starling or amethyst starling, is a relatively small species (17 cm) of starling in the family Sturnidae. It is the only member of the genus Cinnyricinclus. This strongly sexually dimorphic species is found widely in the woodlands and savannah forest edges of mainland sub-Saharan Africa. It is rarely seen on the ground, but instead found in trees and other locations away from the ground.
The racket-tailed roller 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.
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.
The blue-throated roller is a species of roller in the family Coraciidae. It is native to the African tropical rainforest.
The chattering kingfisher is a species of bird in the kingfisher family Alcedinidae. The species is found in the Cook Islands and the Society Islands in French Polynesia.
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.
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.
Media related to Coracias cyanogaster at Wikimedia Commons