Showing posts with label Genus Ocyceros. Show all posts
Showing posts with label Genus Ocyceros. Show all posts

Saturday, July 14, 2012

>Anthracoceros montani (Sulu Hornbill)

Sulu Hornbill

Sulu Hornbill (Anthracoceros montani) 



Sulu Hornbill
Conservation status

Critically Endangered (IUCN 3.1)
Scientific classification
Kingdom:Animalia
Phylum:Chordata
Class:Aves
Order:Coraciiformes
Family:Bucerotidae
Genus:Anthracoceros
Species:A. montani
Binomial name
Anthracoceros montani
(Oustalet, 1880)
The Sulu Hornbill or Montano's Hornbill (Anthracoceros montani) is a species of hornbill in the Bucerotidae family. It is endemic to the Philippines.
Its natural habitat is subtropical or tropical moist montane forests. It is threatened by habitat loss.

>Anthracoceros marchei (Palawan Hornbill)

Palawan Hornbill


Palawan Hornbill
Conservation status

Vulnerable (IUCN 3.1)
Scientific classification
Kingdom:Animalia
Phylum:Chordata
Class:Aves
Order:Coraciiformes
Family:Bucerotidae
Genus:Anthracoceros
Species:A. marchei
Binomial name
Anthracoceros marchei
Oustalet, 1885
Palawan Hornbill range
The Palawan Hornbill (Anthracoceros marchei), known locally as Talusi in Filipino language, is a smallish (approximately 70 centimetres (28 in) long) forest-dwelling bird. Its plumage is predominantly black with a white tail, a dark green gloss on its upper parts and a large creamy-white beak with a casque typical of the hornbill family. The bird emits loud calls which can be transcribed as kaaww and kreik-kreik.
Nine species of hornbill are found in the Philippines and the Palawan Hornbill is endemic to Palawan island, but has also been recorded on nearby islands of Balabac, Busuanga, Calauit, Culion and Coron. Most visiting birdwatchers travel to St Paul's National Park, Palawan to see this bird, but it is now uncommon. It acts as a bio-indicator due to its sensitivity to environmental changes. It is officially classified as "vulnerable" and its numbers have reduced by at least 20% in the last 10 years, due to habitat destruction and hunting for food and the live bird trade.
It is usually seen in pairs or small noisy family parties, and has a communal roosting site. It is most usually observed in fruiting trees at the forest edge, but also feeds on insects and small reptiles.

>Anthracoceros malayanus (Black Hornbill)

Black Hornbill


Black Hornbill
Male at London Zoo, England
Conservation status

Near Threatened (IUCN 3.1)
Scientific classification
Kingdom:Animalia
Phylum:Chordata
Class:Aves
Order:Coraciiformes
Family:Bucerotidae
Genus:Anthracoceros
Species:A. malayanus
Binomial name
Anthracoceros malayanus
(Raffles, 1822)
The Black HornbillAnthracoceros malayanus, is a species of bird of the hornbill family Bucerotidae.
It lives in Asia in Brunei Darussalam, Indonesia, Malaysia, Singapore, Thailand, India.

Female at Kuala Lumpur Bird Park, Singapore

>Anthracoceros albirostris (Oriental Pied Hornbill)

Oriental Pied Hornbill


Oriental Pied Hornbill
Conservation status

Least Concern (IUCN 3.1)
Scientific classification
Kingdom:Animalia
Phylum:Chordata
Class:Aves
Order:Coraciiformes
Family:Bucerotidae
Genus:Anthracoceros
Species:A. albirostris
Binomial name
Anthracoceros albirostris
(Shaw & Nodder, 1807)
The Oriental Pied Hornbill (Anthracoceros albirostris) is a species of hornbill in the Bucerotidae family. It is found in the Indian Subcontinent and Southeast Asia, ranging across Bangladesh,
Bhutan, Brunei, Cambodia, India, Indonesia, Laos, Malaysia,
Myanmar, Nepal,
Singapore, Thailand, Tibet, and Vietnam. Its natural habitat is subtropical or tropical moist lowland forests. The Oriental Pied Hornbill's diet includes wild fruit (esp. figs, genus Ficus) and other fruit such as rambutans, along with small reptiles such as lizards and frogs, and larger insects.

Gallery

>Anthracoceros coronatus (Malabar Pied Hornbill)

Malabar Pied Hornbill


Malabar Pied Hornbill
In Karwar district, Karnataka, India
Conservation status

Near Threatened (IUCN 3.1)
Scientific classification
Kingdom:Animalia
Phylum:Chordata
Class:Aves
Order:Coraciiformes
Family:Bucerotidae
Genus:Anthracoceros
Species:A. coronatus
Binomial name
Anthracoceros coronatus
(Boddaert, 1783)
The Malabar Pied Hornbill (Anthracoceros coronatus) also known as lesser Pied Hornbill, is a hornbill. Hornbills are a family of tropical near-passerine birds found in the Old World.
The Malabar Pied Hornbill is a common resident breeder in tropical southern Asia from India and Sri Lanka east to Borneo. Its habitat is evergreen and moist deciduous forests, often near human settlements.
During incubation, the female lays two or three white eggs in a tree hole, which is blocked off with a cement made of mud, droppings and fruit pulp. There is only one narrow aperture, just big enough for the male to transfer food to the mother and the chicks.
When the chicks have grown too large for the mother to fit in the nest with them, the mother breaks out and rebuilds the wall, after which both parents feed the chicks.
The Malabar Pied Hornbill is a large hornbill, at 65 cm in length. It has mainly black plumage apart from its white belly, throat patch, tail sides and trailing edge to the wings. The bill is yellow with a large, mainly black casque. Females have white orbital skin which is not there in case of Males. Juveniles don't have the casque.
This species is omnivorous, taking fruits, small mammals, birds, small reptiles, insects etc. Prey is killed and swallowed whole. Figs form an important part of their diet and contribute to 60% of their diet from May to February, the non-breeding season and during breeding (March to April) up to 75% of the fruits delivered at the nest were figs. They also feed on other fruits including those of the Strychnos nux-vomica that are known to be toxic to many vertebrates.
A study comparing population over a 23 year period at Dandeli found no significant change.
In central India, tribals believed that hanging a skull of the hornbill (known as dhanchidiya) brought wealth.

>>Genus Anthracoceros

Anthracoceros




Anthracoceros
Oriental Pied Hornbill.
Scientific classification
Kingdom:Animalia
Phylum:Chordata
Class:Aves
Order:Coraciiformes
Family:Bucerotidae
Genus:Anthracoceros
L. Reichenbach, 1849
Species
Anthracoceros coronatus
Anthracoceros albirostris
Anthracoceros malayanus
Anthracoceros marchei
Anthracoceros montani
Anthracoceros is an Asian genus of the Bucerotidae family (hornbills). Species included in the genus are:
  • Malabar Pied Hornbill, Anthracoceros coronatus
  • Oriental Pied Hornbill, Anthracoceros albirostris
  • Black Hornbill, Anthracoceros malayanus
  • Palawan Hornbill, Anthracoceros marchei
  • Sulu Hornbill, Anthracoceros montani

Friday, July 13, 2012

>Ocyceros birostris (Indian Grey Hornbill)

Indian Grey Hornbill


Indian Grey Hornbill
Male feeding a female at nest (Wagah Border, India)
Conservation status

Least Concern (IUCN 3.1)
Scientific classification
Kingdom:Animalia
Phylum:Chordata
Class:Aves
Order:Coraciiformes
Family:Bucerotidae
Genus:Ocyceros
Species:O. birostris
Binomial name
Ocyceros birostris
(Scopoli, 1786)
Synonyms
Lophoceros birostris
Tockus birostris
Ocyceros ginginianus
Meniceros birostris
The Indian Grey Hornbill (Ocyceros birostris) is a common hornbill found on the Indian subcontinent. It is mostly arboreal and is commonly sighted in pairs. They have grey feathers all over the body with a light grey or dull white belly. The horn is black or dark grey with a casque extending up to the point of curvature in the horn. They are one of the few hornbill species found within urban areas in many cities where they are able to make use of large avenue trees.

Description


An individual with a shorter casque, possibly a female
They are about 24 inches long. The upperparts are greyish brown and there is a slight trace of a pale supercilium. The ear coverts are darker. The flight feathers of the wing are dark brown and whitish tipped. The tail has a white tip and a dark subterminal band. They have a red iris and the eyelids have eyelashes. The casque is short and pointed.The male has a larger casque on a dark bill while the culmen and lower mandible are yellowish. The bare skin around the eye is dark in the male while it is sometimes pale reddish in females. The female has a more yellowish bill with black on the basal half and on the casque.

Distribution

The species is found mainly on the plains up to about 2000 feet. It is found from the foothills of the Himalayas southwards bounded on the west by the Indus system and the Gangetic delta on the east. It may make local movements in the drier western region. It is found even within cities that have old avenue trees. It is found mainly on the plains up to about 1400 m and does not overlap much with the Malabar Grey Hornbill of the Western Ghats.

Behaviour and ecology


A male
The call is a squealing call somewhat like that of a Black Kite. The flight is heavy and involves flapping interspersed with glides. They are found in pairs or small groups.
The nesting season is April to June and the clutch varies from one to five very symmetrical white eggs. Indian Grey Hornbills usually nest in tree hollows on tall trees. An existing hollow may be excavated further to suit. The female enters the nest hollow and seals the nest hole and leaves only a small vertical slit that the male uses to feed her. The nest entrance is sealed by the female using its excreta and mud-pellets supplied by the male.  While inside the nest, the female moults her flight feathers and incubates the eggs. The regrowth of the feathers in the female coincides with the maturity of the chicks at which point the nest is broken open.
Greyhornbill.ogg
Calls (recorded at Pune, India)
A study at a nest near Mumbai noted that the key fruiting trees on which they fed were Streblus asperCansjera rheediiCarissa carandasGrewia tiliaefoliaLannea coromandelica,Ficus spp., Sterculia urens and Securinega leucopyrus. They are also known to take molluscs, scorpions, insects, small birds (has been recorded removing and possibly preying on the chicks of Rose-ringed Parakeets) and reptiles in their diet They are known to feed on the fruits of Thevetia peruviana which are known to be toxic to many vertebrates.
They are almost completely arboreal and very rarely descend to the ground where they may pick up fallen fruits or dust bathe. They descend to the ground also to pick up mud pellets for sealing the nest cavity during the nesting period.They indulge in various social activities which include bill-grappling and aerial jousting.

>Ocyceros gingalensis (Sri Lanka Grey Hornbill)

Sri Lanka Grey Hornbill


Sri Lanka Grey Hornbill
Matale , Sri Lanka
Conservation status

Least Concern (IUCN 3.1)
Scientific classification
Kingdom:Animalia
Phylum:Chordata
Class:Aves
Order:Coraciiformes
Family:Bucerotidae
Genus:Ocyceros
Species:O. gingalensis
Binomial name
Ocyceros gingalensis
Shaw, 1811
The Sri Lanka Grey Hornbill (Ocyceros gingalensis) is a hornbill and a widespread and common endemic resident breeder in Sri Lanka. Hornbills are a family of tropical near-passerine birds found in the Old World.
The Sri Lanka Grey Hornbill is a gregarious bird found in forest habitats. It feeds mostly on figs, although occasionally it eats small rodents, reptiles and insects. The female lays up to four white eggs in a tree hole blocked off during incubation with a cement made of mud, droppings and fruit pulp. There is only one narrow aperture, barely wide enough for the male to transfer food to the mother and the chicks.
The Grey Hornbill is a large bird at 45cm in length. It has grey wings with black primary flight feathers, a grey back, and a brown crown. Its long tail is blackish with white sides, and the underparts are white. The long curved bill has no casque. Sexes are similar, although the male has a cream-coloured bill, whereas the female's is black with a cream stripe. Immature birds have dark grey upperparts, a cream bill, and a tail with a white tip. Its flight is slow and powerful.

In culture

In Sri Lanka, this bird is known as Alu Kadatta' in Sinhala Language.

>Ocyceros griseus (Malabar Grey Hornbill)

Malabar Grey Hornbill


Malabar Grey Hornbill
Female with dark base of lower bill (Thattekad, Kerala)
Male in Kerala, India
Conservation status

Least Concern (IUCN 3.1)
Scientific classification
Kingdom:Animalia
Phylum:Chordata
Class:Aves
Order:Coraciiformes
Family:Bucerotidae
Genus:Ocyceros
Species:O. griseus
Binomial name
Ocyceros griseus
(Latham, 1790)
Synonyms
Tockus griseus
Lophoceros griseus
The Malabar Grey Hornbill'Ocyceros griseus, is a hornbill that is endemic to the Western Ghats and associated hills of southern India. They have a large beak but lack the casque that is prominent in other species of hornbills. They are found mainly in dense forest and around rubber, arecanut or coffee plantations.They move around in small groups, feeding on figs and other forest fruits. Their loud cackling and laughing call makes them familiar to people living in the region.

Description


An adult male
The Malabar Grey Hornbill is a large bird, at 45 cm in length with a 23 cm tail and pale or yellowish to orange bill. Males have a reddish bill with a yellow tip while the females have a plain yellow bill with black at the base of the lower mandible and a black stripe along the culmen. They show a broad whitish superciliary band above the eye running down to the neck. They fly with a strong flap and glide flight and hop around heavily on the outer branches of large fruiting trees. They has brown-grey wings, a white carpal patch and black primary flight feathers tipped with white. The Indian Grey Hornbill which is found mainly on the adjoining plains is easily told apart by its prominent casque and in flight by the white trailing edge to the entire wing. The Malabar Grey Hornbill has a grey back, and a cinnamon vent. The long tail is blackish with a white tip, and the underparts are grey with white streaks. The long curved bill has no casque. Immature birds have browner upperparts and a yellow bill.Young birds have a dull white or yellow iris.
Their loud calls are distinctive and include "hysterical cackling", "laughing" and "screeching" calls. (About this sound Cackle calls  About this sound Screeches )

Distribution

The Malabar Grey Hornbill is a common resident breeder in the Western Ghats and associated hills of southern India. They are mainly found in dense forest habitats and the thinner dry forest habitat of the plains is typically occupied by the Indian Grey Hornbill. In the past the Sri Lanka Grey Hornbill was included with this species but is now considered distinct.

Behaviour and ecology

This hornbill is found in small groups mainly in habitats with good tree cover and being large frugivores, they are important as seed dispersal agents for many species of fruit bearing forest trees. They also feed on small vertebrates and in captivity they will readily take meat.

Breeding

Malabar Grey Hornbill.ogg
Molem, Goa, India Nov 1997
The breeding season is January to May. Being secondary cavity nesters (incapable of excavating their own nests), the find trees with large cavities. A study in the Anaimalai Hills showed that the species preferred nest sites that had large trees. The nest holes were usually found in large trees with hollows caused by heart-rot where a branch had broken off. Trees of the species Lagerstroemia microcarpa,Terminalia bellirica and Terminalia crenulata were found to hold nearly 70% of all the nests in the Mudumalai area.The species is monogamous and the same nest sites are used by the pair year after year. The female incarcerates herself within the cavity by sealing its entrance with a cement made from her droppings. The female then lays three or sometimes four white eggs and begins a complete moult of her flight feathers. The entrance to the nest retains a narrow aperture through which the female voids excreta and receives food from the male. The male brings all the food needed for the female and the young. Berries, insects, small rodents and reptiles are included in the diet. Males tap the tree to beckon the female on arriving with food.Berries are regurgitated one at a time and shifted to the tip of the bill before being passed to the female.

>>Genus Ocyceros

Ocyceros


Ocyceros
Head of Indian Grey Hornbill, woodcut from The Fauna of British India, Including Ceylon and Burma
Scientific classification
Kingdom:Animalia
Phylum:Chordata
Class:Aves
Order:Coraciiformes
Family:Bucerotidae
Genus:Ocyceros
Hume, 1873
Species
See text
Ocyceros is an genus of the Bucerotidae family (hornbills) that is limited to the Indian Subcontinent. The three Species included in the genus are:
  • Malabar Grey Hornbill, Ocyceros griseus
  • Sri Lanka Grey Hornbill, Ocyceros gingalensis
  • Indian Grey Hornbill, Ocyceros birostris