Ground hornbill Temporal range: Middle Miocene to present | |
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Head of the male Abyssinian ground hornbill (B. abyssinicus) | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Aves |
Order: | Bucerotiformes |
Family: | Bucorvidae Bonaparte, 1854 |
Genus: | Bucorvus Lesson, 1830 |
Species | |
Bucorvus leadbeateri |
The ground hornbills (Bucorvidae) are a family of the order Bucerotiformes, with a single genus Bucorvus and two extant species. The family is endemic to sub-Saharan Africa: the Abyssinian ground hornbill occurs in a belt from Senegal east to Ethiopia, and the southern ground hornbill occurs in southern and East Africa.
Ground hornbills are large, with adults around a metre tall. Both species are ground-dwelling, unlike other hornbills. Also unlike most other hornbills, they are carnivorous and feed on insects, snakes, other birds, amphibians and even tortoises. [1] They are among the longest-lived of all birds, [2] and the larger southern species is possibly the slowest-breeding (triennially) and longest-lived of all birds. [3]
The genus Bucorvus was introduced, originally as a subgenus, by the French naturalist René Lesson in 1830 with the Abyssinian ground hornbill Bucorvus abyssinicus as the type species. [4] [5] The generic name is derived from the name of the genus Buceros introduced by Carl Linnaeus in 1758 for the Asian hornbills where corvus is the Latin word for a "raven". [6]
A molecular phylogenetic study published in 2013 found that the genus Bucorvus was sister to the rest of the hornbills. [7]
The genus Bucorvus contains two species: [8]
Common name | Scientific name and subspecies | Range | Size and ecology | IUCN status and estimated population |
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Abyssinian ground hornbill, northern ground hornbill | Bucorvus abyssinicus (Boddaert, 1783) | southern Mauritania, Senegal and Guinea east to Eritrea, Ethiopia, north western Somalia, north western Kenya and Uganda | Size: Habitat: Diet: | LC |
Southern ground hornbill | Bucorvus leadbeateri (Vigors, 1825) | northern Namibia and Angola to northern South Africa and southern Zimbabwe to Burundi and Kenya | Size: Habitat: Diet: | VU |
A prehistoric ground hornbill, Bucorvus brailloni , has been described from fossil bones in Morocco, suggesting that prior to Quaternary glaciations the genus was either much more widespread or differently distributed. [9]
It is currently thought that the ground hornbills, along with Tockus and Tropicranus , are almost exclusively carnivorous [1] and lack the gular pouch that allows other, less closely related hornbill genera to store fruit.
Hornbills are birds found in tropical and subtropical Africa, Asia and Melanesia of the family Bucerotidae. They are characterized by a long, down-curved bill which is frequently brightly coloured and sometimes has a horny casque on the upper mandible. Hornbills have a two-lobed kidney. They are the only birds in which the first and second neck vertebrae are fused together; this probably provides a more stable platform for carrying the bill. The family is omnivorous, feeding on fruit and small animals. They are monogamous breeders nesting in natural cavities in trees and sometimes cliffs. A number of mainly insular species of hornbill with small ranges are threatened with extinction, namely in Southeast Asia.
The European roller is the only member of the roller family breeding in Europe. Its range extends into the Middle East, Central Asia and the Maghreb. It winters in southern Africa, primarily in dry wooded savanna and bushy plains. It occurs in a wide variety of habitats, but avoids treeless plains. It usually nests in tree holes.
The typical warblers are small birds belonging to the genus Sylvia in the "Old World warbler" family Sylviidae.
The Eurylaimidae are a family of suboscine passerine birds that occur from the eastern Himalayas to Indonesia and the Philippines. The family previously included the sapayoa from the Neotropics, the asities from Madagascar, and the Calyptomenidae from Africa and Asia, but these are now separated into distinct families.
The Caspian tern is a species of tern, with a subcosmopolitan but scattered distribution. Despite its extensive range, it is monotypic of its genus, and has no accepted subspecies. The genus name is from Ancient Greek hudros, "water", and Latin progne, "swallow". The specific caspia is from Latin and, like the English name, refers to the Caspian Sea.
The southern ground hornbill is one of two species of ground hornbill, both of which are found solely within Africa, and is the largest species in the hornbill order worldwide. It can be found in the southern regions of Africa, ranging from Kenya to South Africa. Within these regions, they inhabit both woodlands and savannas. The other species of the genus Bucorvus is the Abyssinian ground hornbill, B. abyssinicus.
The gull-billed tern, formerly Sterna nilotica, is a tern in the family Laridae. It is widely distributed and breeds in scattered localities in Europe, Asia, northwest Africa, and the Americas. The Australian gull-billed tern was previously considered a subspecies.
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The guira cuckoo is a gregarious bird found widely in open and semi-open habitats of northeastern, eastern and southern Brazil, Uruguay, Paraguay, Bolivia, and northeastern Argentina. It is the only species placed in the genus Guira.
The Abyssinian ground hornbill or northern ground hornbill is an African bird, found north of the equator, and is one of two species of ground hornbill. It is the second largest species of African hornbill, only surpassed by the slightly larger southern ground hornbill.
The great hornbill, also known as the concave-casqued hornbill, great Indian hornbill or great pied hornbill, is one of the larger members of the hornbill family. It occurs in the Indian subcontinent and Southeast Asia. It is predominantly frugivorous, but also preys on small mammals, reptiles and birds. It has been listed as Vulnerable on the IUCN Red List since 2018. It is known to have lived for nearly 50 years in captivity. Due to its large size and colour, and importance in many tribal cultures and rituals, the Government of Kerala declared it as the official Kerala state bird.
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Buteogallus is a genus of birds of prey in the family Accipitridae. All members of this genus are essentially neotropical, but the distribution of a single species extends slightly into the extreme southwestern United States. Many of the species are fond of large crustaceans and even patrol long stretches of shore or riverbank on foot where such prey abounds, but some have a rather different lifestyle. Unlike many other genera of raptor, some members are referred to as "hawks", and others as "eagles".
The scissor-tailed kite, also known as African swallow-tailed kite or fork-tailed kite, is a bird of prey in the family Accipitridae. It is the only species placed in the genus Chelictinia. It is widespread in the northern tropics of Africa.
Ketupa is a genus of owls in the family Strigidae. The genus formerly contained just three species, the fish owls but based on the results from a genetic study published in 2020, the generic boundaries were altered. The genus now contains twelve species, nine of which were formerly placed in the genus Bubo.
The white-breasted robin is a passerine bird in the Australasian robin family Petroicidae and the yellow robin genus Eopsaltria. Occasionally it is placed in the genus Quoyornis Mathews, 1912. It is endemic to southwestern Australia. Unlike many other Australian robins, it lacks bright colours in its plumage, being a predominantly greyish bird with white underparts. Like other closely related Australasian robins, it is a cooperative breeder. It is sedentary, with pairs or small groups maintaining territories.