Malabar grey hornbill

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Malabar grey hornbill
Ocyceros griseus -India-6-4c.jpg
Ocyceros griseus -Kerala, India -male-8a.jpg
A female (top) with dark base to the lower mandible, and a male (below), both in Kerala, India
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Bucerotiformes
Family: Bucerotidae
Genus: Ocyceros
Species:
O. griseus
Binomial name
Ocyceros griseus
(Latham, 1790)
MalabarGreyHornbillMap.png
 recorded locations
Synonyms

Tockus griseus
Lophoceros griseus

The Malabar gray hornbill (Ocyceros griseus) is a hornbill endemic to the Western Ghats and associated hills of southern India. They have a large beak but lack the casque that is prominent in some other hornbill species. They are found mainly in dense forest and around rubber, arecanut or coffee plantations. [2] They move around in pairs or small groups, feeding on figs and other forest fruits. Their loud cackling and laughing call makes them familiar to people living in the region.

Contents

Description

An adult male Malabar grey hornbill.jpg
An adult male

The Malabar grey hornbill is a large bird, but at 45 to 58 cm (18 to 23 in) in length it is still the smallest of the Asian hornbills. It has a 23 cm (9.1 in) tail and pale or yellowish to orange bill. [3] 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 have 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 of 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. [4] Young birds have a dull white or yellow iris. [5] [6]

Their loud calls are distinctive and include "hysterical cackling", "laughing" and "screeching" calls. [7]

Local names

சோலைக்  காகா (solai kaka, Tamil, meaning forest crow); சராட்டான் (sarattaan, Kadar); செரியன் ஓங்கல் (seriyan oongal, Muthuvan, meaning small hornbill); ಕಲ್ದಲ್ ಹಕ್ಕಿ (kaldal hakki, Kannada), കോഴിവേഴാമ്പൽ (kozhi vezhambal, Malayalam), chotta peelu or dhanesh in Marathi, and gobre vaayre in Konkani.

Cackle calls
Screeches

Distribution

The species is endemic to the Western Ghats mountain range of India from about Nashik in the north to the southernmost hills [7] . The species has an elevational distribution range from about 50 m near the coast (e.g., Phansad Wildlife Sanctuary, Maharashtra) to around 1,500 m in the mountains. [8] In the southern Western Ghats, Malabar Grey Hornbills were reported in evergreen forests between 500 m and 900 m (sporadically to 1,100 m) elevation in Kalakad – Mundanthurai Tiger Reserve, but frequently up to 1,200 m in the Anamalai Hills further north. [9] In both these sites, the estimated Malabar Grey Hornbill density decreased with elevation, with the population density in rainforest fragments in the Anamalai Hills being additionally positively related to food tree species richness. The species is found mainly in dense forest habitats; the thinner dry forest habitat of the plains is typically occupied by the Indian grey hornbill. The Sri Lanka grey hornbill was included with this species in the past, but is now considered distinct. [4]

Behaviour and ecology

This hornbill is found in small groups mainly in habitats with good tree cover. Being large frugivores, they are important as seed dispersal agents for many species of fruit bearing forest trees. [10] They also feed on small vertebrates and in captivity they will readily take meat. [11]

Breeding

Molem, Goa, India Nov 1997

The breeding season is January to May. Being secondary cavity nesters (incapable of excavating their own nests), they 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. [12] 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. [13] 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. [14] Berries are regurgitated one at a time and shifted to the tip of the bill before being passed to the female. [7]

Related Research Articles

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

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, mainly in Southeast Asia.

<span class="mw-page-title-main">Malabar trogon</span> Species of bird

The Malabar trogon is a species of bird in the trogon family. It is found in the forests of India and Sri Lanka. In India it is mainly found in the Western Ghats, hill forests of central India and in parts of the Eastern Ghats. They are insectivorous and although not migratory, may move seasonally in response to rain in hill forest regions. Like in other trogons, males and females vary in plumage. The birds utter low guttural calls that can be heard only at close quarters and the birds perch still on a branch under the forest canopy, often facing away from the viewer making them easy to miss despite their colourful plumage.

<span class="mw-page-title-main">Malabar whistling thrush</span> Species of bird

The Malabar whistling thrush is a whistling thrush in the family Muscicapidae. The bird has been called whistling schoolboy for the whistling calls that they make at dawn that have a very human quality. The species is a resident in the Western Ghats and associated hills of peninsular India including central India and parts of the Eastern Ghats.

<span class="mw-page-title-main">Sri Lanka grey hornbill</span> Species of bird

The Sri Lanka grey hornbill is a bird in the hornbill family 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.

<span class="mw-page-title-main">Malabar pied hornbill</span> Species of bird

The Malabar pied hornbill, also known as the lesser pied hornbill, is a bird in the hornbill family, a family of tropical near-passerine birds found in the Old World.

<span class="mw-page-title-main">Karnala Bird Sanctuary</span> Bird sanctuary in India

The Karnala Bird Sanctuary is located in Panvel Taluka of Raigad District, outside Mumbai, India near Matheran and Karjat.It is the first bird sanctuary in Maharashtra. The sanctuary is quite small with an area of 12.11 square kilometres but is, along with the Sanjay Gandhi National Park and Tungareshwar Wildlife Sanctuary, one of the few sanctuaries to be within reach of the city of Mumbai.

<span class="mw-page-title-main">Malabar Coast moist forests</span> Ecoregion in India

The Malabar Coast moist forests are a tropical moist broadleaf forest ecoregion of southwestern India.

<span class="mw-page-title-main">South Western Ghats moist deciduous forests</span> Ecoregion in India

The South Western Ghats moist deciduous forests is an ecoregion in the Western Ghats of southern India with tropical and subtropical moist broadleaf forests. This biome covers the Nilgiri Hills between elevation of 250 and 1,000 m in Kerala, Karnataka and Tamil Nadu states.

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

The Indian gray hornbill is a common hornbill found on the Indian subcontinent. It is mostly arboreal and is commonly sighted in pairs. It has 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 to the point of curvature of the horn. It is one of the few hornbill species found in urban areas in many cities where they are able to make use of large trees in avenues.

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

The blue-winged parakeet, also known as the Malabar parakeet is a species of parakeet endemic to the Western Ghats of southern India. Found in small flocks, they fly rapidly in forest clearings while making screeching calls that differ from those of other parakeet species within their distribution range. Their long blue tails tipped in yellow and the dark wings with blue contrast with the dull grey of their head and body. Adult males and females can be easily told apart from the colour of their beak.

<span class="mw-page-title-main">Great hornbill</span> Bird species

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.

<span class="mw-page-title-main">Mudumalai National Park</span> National park in Tamil Nadu, India

Mudumalai National Park is a national park in the Nilgiri Mountains in Tamil Nadu in southern India. It covers 321 km2 (124 sq mi) at an elevation range of 850–1,250 m (2,790–4,100 ft) in the Nilgiri District and shares boundaries with the states of Karnataka and Kerala. A part of this area has been protected since 1940. The national park has been part of Nilgiri Biosphere Reserve since 1986 and was declared a tiger reserve together with a buffer zone of 367.59 km2 (141.93 sq mi) in 2007. It receives an annual rainfall of about 1,420 mm (56 in) and harbours tropical and subtropical moist broadleaf forests with 498 plant species, at least 266 bird species, 18 carnivore and 10 herbivore species. It is drained by the Moyar River and several tributaries, which harbour 38 fish species.

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

The black baza is a small bird of prey found in the forests of Northeast India, the eastern Himalayas, China and Southeast Asia. Many populations are migratory, including those in the Indian region, which winter in the south of the Peninsula and Sri Lanka. Black bazas have short, stout legs and feet with strong talons, and a prominent crest. They are found in dense forest, often in small groups, and can often be found perched on bare branches of tall trees rising above the forest canopy.

<span class="mw-page-title-main">Painted francolin</span> Species of bird

The painted francolin or painted partridge is a species of francolin found in grassy areas in central and southern India and in the lowlands of southeastern Sri Lanka. They are easily detected by their loud calls especially during the breeding season. Thomas C. Jerdon noted that the species was found mainly in Central India south of the Narmada and to the east of the Western Ghats as well as the Chota Nagpur and Northern Circars. It can be confused only with the black francolin with which it partly overlaps and is said to sometimes hybridize. This species can be told apart from a black francolin female by the lack of a rufous hind collar and the white spots on the underside. The face is rufous and there is no dark stripe running behind the eye.

<span class="mw-page-title-main">Bucerotiformes</span> Order of birds

Bucerotiformes is an order of birds that contains the hornbills, ground hornbills, hoopoes and wood hoopoes. These birds were previously classified as members of Coraciiformes. The clade is distributed in Africa, Asia, Europe and Melanesia.

<span class="mw-page-title-main">Black-and-white-casqued hornbill</span> Species of bird

The black-and-white-casqued hornbill also known as the grey-cheeked hornbill, is a large black and white hornbill. It has an oversized blackish bill with a large casque on top. The female is slightly smaller than the male and has a significantly smaller casque. It is a monogamous species, and pairs nest in suitable tree cavities. The female usually lays up to two eggs. The diet consists mainly of figs, fruits, insects and small animals found in the trees.

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

The oriental pied hornbill is an Indo-Malayan pied hornbill, a large canopy-dwelling bird belonging to the family Bucerotidae. Two other common names for this species are Sunda pied hornbill (convexus) and Malaysian pied hornbill.

<span class="mw-page-title-main">Sulu hornbill</span> Species of bird

The Sulu hornbill, or Montano's hornbill, is a species of hornbill in the family Bucerotidae. It is endemic to the Sulu archipelago in the Philippines, with the remaining populations in Tawi-Tawi with it believed to be hunted to extinction on Jolo. Its natural habitat is tropical moist forests. It is threatened by habitat loss as well as potential harvesting for food. Its diet includes fruit, insects, and small lizards.

<span class="mw-page-title-main">New Amarambalam Reserved Forest</span>

New Amarambalam reserved forest is a reserved forest in the Western Ghats, situated in the Malappuram District of Kerala state of India. It extends till Silent Valley National Park of the Palakkad District to the south and to Nadugani in the Nilgiri District of Tamil Nadu to the North. It is under the Karimpuzha Wildlife Sanctuary.

References

  1. BirdLife International (2020). "Ocyceros griseus". IUCN Red List of Threatened Species . 2020: e.T22682421A182384253. doi: 10.2305/IUCN.UK.2020-3.RLTS.T22682421A182384253.en . Retrieved 19 November 2021.
  2. Ranganathan, J; Daniels, RJ; Chandran, MD; Ehrlich, PR; Daily, GC (November 2008). "Sustaining biodiversity in ancient tropical countryside". Proc. Natl. Acad. Sci. 105 (46): 17852–17854. doi: 10.1073/pnas.0808874105 . PMC   2577706 . PMID   18981411.
  3. Ali, S. (1993). The Book of Indian Birds. Bombay: Bombay Natural History Society. ISBN   0-19-563731-3.
  4. 1 2 Rasmussen, PC & Anderton, JC (2005). Birds of South Asia: The Ripley Guide. Smithsonian Institution and Lynx Editions. Vol. 2. p. 272.
  5. Blanford, W. T. (1895). Fauna of British India. Birds. Volume 3. London: Taylor and Francis. pp. 156–157.
  6. Baker, ECS. Fauna of British India. Birds. Volume 4 (2nd ed.). London: Taylor and Francis. pp. 303–304.
  7. 1 2 3 Ali, S. & Ripley, S. D. (1983). Handbook of the Birds of India and Pakistan. Volume 4 (2nd ed.). New Delhi: Oxford University Press. pp. 132–133.
  8. Mudappa, D. & Raman, T. R. S. 2009. A conservation status survey of hornbills (Bucerotidae) in the Western Ghats, India. Indian Birds 5: 90–102 Archived 20 January 2022 at the Wayback Machine .
  9. Raman, T. R. Shankar; Mudappa, Divya (September 2003). "Correlates of hornbill distribution and abundance in rainforest fragments in the southern Western Ghats, India". Bird Conservation International. 13 (3): 199–212. doi: 10.1017/S0959270903003162 . ISSN   1474-0001.
  10. Mudappa, Divya (2000). "Breeding biology of the Malabar Grey Hornbill (Ocyceros griseus) in southern Western Ghats, India". J. Bombay Nat. Hist. Soc. 97 (1): 15–24. Archived from the original on 22 November 2021. Retrieved 21 February 2018.
  11. Abdulali, Humayun (1951). "Some notes on the Malabar Grey Hornbill [Tockus griseus (Bath.)]". J. Bombay Nat. Hist. Soc. 50 (2): 403–404. Archived from the original on 27 September 2017. Retrieved 21 February 2018.
  12. Mudappa, D.C.; Kannan, R. (1997). "Nest-site characteristics and nesting success of the Malabar Gray Hornbill in the southern Western Ghats, India". Wilson Bull. 102–111 (1).
  13. Maheswaran B.; Balasubramanian P. (2003). "Nest tree utilization by the Malabar Grey Hornbill Ocyceros griseus in the semi-evergreen forest of Mudumalai Wildlife Sanctuary (S India)". Acta Ornithol. 38: 33–37. doi: 10.3161/068.038.0108 .
  14. Abdulali, Humayun (1942). "The nesting of the Malabar Grey Hornbill". J. Bombay Nat. Hist. Soc. 43 (1): 102–103. Archived from the original on 22 November 2021. Retrieved 21 February 2018.