Great slaty woodpecker

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Great slaty woodpecker
Great Slaty Woodpecker Kaladhungi Nainital Uttarakhand India 07.10.2014.jpg
Mulleripicus pulverulentus mohun(♂) from the lower Himalayas of Kaladhungi, Uttarakhand, India
Scientific classification Red Pencil Icon.png
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Piciformes
Family: Picidae
Genus: Mulleripicus
Species:
M. pulverulentus
Binomial name
Mulleripicus pulverulentus
(Temminck, 1826)
Mulleripicus pulverulentus distr.png

The great slaty woodpecker (Mulleripicus pulverulentus) is a species of bird in the family Picidae. It is found across the Indian Subcontinent and Southeast Asia. A unique and basically unmistakable bird, it is the largest species of woodpecker that is certain to exist today. It is a fairly gregarious species.

Contents

Range

It is found in the Indian subcontinent and Southeast Asia, ranging across Bangladesh, Bhutan, Brunei, Cambodia, India, Indonesia, Laos, Malaysia, Myanmar, Nepal, the Philippines, Singapore, Thailand and Vietnam. It is found in the Greater Sundas, but it does not inhabit Bali. [1] [2]

Habitat

The great slaty woodpecker is dependent on dense, old-growth forest, particularly broadleaf forests. Great Slaty Woodpecker - Mulleripicus pulverulentus - P1100509.jpg
The great slaty woodpecker is dependent on dense, old-growth forest, particularly broadleaf forests.

This species prefers to inhabit areas of primary semi-open, moist deciduous and tropical evergreen forest though can on occasion range into adjacent secondary forests, clearings with scattered tall trees and similar almost park-like areas but do not generally visit heavily disturbed areas. Locally, the great slaty woodpecker prefers sprawling stands of dipterocarp and teak trees. Also found in mature sal forests, swamp forest and mangroves with tall, mature trees. The species usually occurs below an elevation of 600 m (2,000 ft), but also locally in montane areas of up to 1,100 m (3,600 ft), occasionally ranging up to 2,000 m (6,600 ft). [2]

Description

Great slaty woodpeckers are one of the largest woodpeckers and the largest species certain to exist. Great slaty woodpecker.jpg
Great slaty woodpeckers are one of the largest woodpeckers and the largest species certain to exist.

With the probable extinctions of the imperial woodpecker and the ivory-billed woodpecker, this species, at 48–58 cm (19–23 in) long and a weight of 360–563 g (0.794–1.241 lb), stands as the largest woodpecker in the world. [3] The average weight was claimed in one study as 430 g (15 oz). [4] Among standard measurements, the wing chord is 21.5 to 25 cm (8.5 to 9.8 in), the tail is 13.4 to 16.2 cm (5.3 to 6.4 in), the bill is 6 to 6.5 cm (2.4 to 2.6 in) and the tarsus is 3.6 to 4.1 cm (1.4 to 1.6 in). This unique-looking woodpecker has several obvious distinctive features: a very long, strong chisel-tipped bill, an elongated neck and a long tail. A slight crest maybe occasionally evident. This species plumage is almost entirely dark grey or blackish slate-grey overlaid with small white spots. The throat is paler grey and males have small red moustache. Normally, the nominate subspecies is the darkest, most slaty gray race. M. p. harterti has a more pale throat with a greater amount of whitish feather tips forming small spot and is slightly paler below than the nominate, sometimes appearing almost whitish on the belly. The size and structure readily distinguishes this bird from almost any other species, including other woodpeckers. Occasionally, at first glance, the great slaty woodpecker is mistaken for a hornbill but, obviously, such a resemblance is slight at best. [2]

For a bird of such great size, the great slaty woodpecker has a weak, quiet voice, especially compared to other large woodpeckers, which tend to have loud, booming voices. The species call is a whinnying cackle of 2 to 5, usually 4 notes, woikwoikwoikwoik, the initial being higher in pitched and the middle note being distinctly lower. Single dwot calls, variable in sound, strength and duration, are sometimes given while perched or in flight. Breeding pairs of these woodpeckers have been heard to softly mew at each other. In more antagonistic situations, sharp taw-whit or dew-it calls are uttered while the birds swing their heads back and forth. [2]

Ecology

The great slaty woodpecker is somewhat unusual for its habit of traveling in foraging groups. Greatslatywoodpecker.jpg
The great slaty woodpecker is somewhat unusual for its habit of traveling in foraging groups.

Great slaty woodpeckers are mostly seen in groups consisting of 3 to 6 individuals, which consist of a breeding pair and their young from prior years. Groups often forage on shared feeding sites in the form of nests of social insects as ants, termites, wood-boring beetles and stingless bees. Ants seem to be generally favored in the diet, though larvae of other species may be eaten quite regularly as well. Occasionally, small fruit may supplement the diet. Females spend more time searching for feeding sources and males, which have slightly larger bills, spend more time opening the sources. Preferred feeding sources are mostly found in large branches or trunks of large, living trees. The groups will travel considerable distance to access these trees and, as such, the home ranges of the species are quite large. Occasionally, though, they will feed at lower levels in trees and even amongst saplings. Usually, feeding groups of these woodpeckers do not linger in any given area for long. Sometimes this species associates with slightly smaller white-bellied woodpeckers and considerably smaller greater flamebacks, with the foraging methods of the very different woodpeckers minimizing competition between the species. Perhaps more considerable competition for food sources generally comes in the form of hornbills and arboreal (or tree-dwelling) mammals. The great slaty woodpecker usually works a tree upwards and, though capable of swifter movements, has been described while foraging as if moving in "slow motion". It forages by gleaning, probing, pecking, prising off bark and hammering with powerful and loud blows to excavate the wood. Gleaning is the most important foraging method for the species, with the long neck and bill allowing it to reach out over a considerable distance into the cracks and crevices of trees. This species often flies high over the trees for long distances between successful foraging patches. In flight, its feather rustle noisily. The great slaty woodpecker usually engages in less dipping during than other woodpeckers and flies in a mixed flying style described as quite crow-like. [2]

Like all woodpeckers, breeding pairs roost in separate tree holes but regularly vocalized to stay in contact. The pair bond appears to be lifelong. These woodpeckers engage in displays, largely for territorial purposes. Displays include head-swinging, where the appears to lag behind the body in swinging movements, whinnying calls and widen their wings and tail considerably. Few nests of the species have been described in detail, but at least occasionally nests are raised cooperatively by groups. [5] Known nests, at anywhere from 9 to 45 m (30 to 148 ft) in height in the trees, were located in very large trees. When excavating the nest hole, both parents participate but reportedly the male does the majority of the work. The nest hole entrance will be around 10 cm (3.9 in) across, but much wider inside the tree. The pair will only use a nest from a prior year if competition is too overbearing for a newly constructed hole. The nesting season, in Malaysia at least, appears to be from March to August. The clutch reportedly consists of two to four eggs, which are incubated by both parents. Both parents also feed and generally brood the young. The young great slaty woodpeckers probably stay with their parents until the next breeding season. [2]

Status

Like many forest birds of South and Southeast Asia, the great slaty woodpecker is declining due to deforestation and is thus now considered Vulnerable to extinction by IUCN. Mulleripicus pulverulentus.jpg
Like many forest birds of South and Southeast Asia, the great slaty woodpecker is declining due to deforestation and is thus now considered Vulnerable to extinction by IUCN.

Probably because of their feeding and breeding dependence on large old trees, great slaty woodpeckers are most common in primary forests and show density reductions of over 80% in logged forests. [6] The global population is in decline because of the loss of forest cover and logging of old-growth forest throughout its range, with habitat loss being particularly rapid in Myanmar, Cambodia and Indonesia which are the countries that still hold the majority of the global population. In 2010, the great slaty woodpecker was included in the IUCN Red List in the Vulnerable category. [1]

Related Research Articles

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Hornbills (Bucerotidae) are a family of bird found in tropical and subtropical Africa, Asia and Melanesia. They are characterized by a long, down-curved bill which is frequently brightly coloured and sometimes has a casque on the upper mandible. Both the common English and the scientific name of the family refer to the shape of the bill, "buceros" being "cow horn" in Greek. 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.

<span class="mw-page-title-main">Great spotted woodpecker</span> Species of bird

The great spotted woodpecker is a medium-sized woodpecker with pied black and white plumage and a red patch on the lower belly. Males and young birds also have red markings on the neck or head. This species is found across the Palearctic including parts of North Africa. Across most of its range it is resident, but in the north some will migrate if the conifer cone crop fails. Some individuals have a tendency to wander, leading to the recent recolonisation of Ireland and to vagrancy to North America. Great spotted woodpeckers chisel into trees to find food or excavate nest holes, and also drum for contact and territorial advertisement; like other woodpeckers, they have anatomical adaptations to manage the physical stresses from the hammering action. This species is similar to the Syrian woodpecker.

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

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<span class="mw-page-title-main">Eurasian nuthatch</span> Small passerine bird found in temperate Eurasia

The Eurasian nuthatch or wood nuthatch is a small passerine bird found throughout the Palearctic and in Europe. Like other nuthatches, it is a short-tailed bird with a long bill, blue-gray upperparts and a black eye-stripe. It is a vocal bird with a repeated loud dwip call. There are more than 20 subspecies in three main groups; birds in the west of the range have orange-buff underparts and a white throat, those in Russia have whitish underparts, and those in the east have a similar appearance to European birds, but lack the white throat.

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

Woodpeckers are part of the bird family Picidae, which also includes the piculets, wrynecks, and sapsuckers. Members of this family are found worldwide, except for Australia, New Guinea, New Zealand, Madagascar, and the extreme polar regions. Most species live in forests or woodland habitats, although a few species are known that live in treeless areas, such as rocky hillsides and deserts, and the Gila woodpecker specialises in exploiting cacti.

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

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<span class="mw-page-title-main">Pileated woodpecker</span> Species of bird

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

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References

  1. 1 2 3 BirdLife International (2016). "Mulleripicus pulverulentus". IUCN Red List of Threatened Species . 2016: e.T22681585A92911785. doi: 10.2305/IUCN.UK.2016-3.RLTS.T22681585A92911785.en . Retrieved 12 November 2021.
  2. 1 2 3 4 5 6 Hans Winkler, David A. Christie & David Nurney (1995) Woodpeckers: An Identification Guide to the Woodpeckers of the World. Houghton Mifflin, ISBN   978-0395720431.
  3. CRC Handbook of Avian Body Masses by John B. Dunning Jr. (Editor). CRC Press (1992), ISBN   978-0-8493-4258-5.
  4. Styring, A. R., & bin Hussin, M. Z. (2004). Foraging ecology of woodpeckers in lowland Malaysian rain forests. Journal of Tropical Ecology, 20(5), 487-494.
  5. Martjan Lammertink (2004). "Grouping and Cooperative Breeding in the Great Slaty Woodpecker". The Condor. 106 (2): 309–319. doi:10.1650/7433. JSTOR   1370638. S2CID   86059150.
  6. Meijaard, Erik (2005). Life after logging: Reconciling wildlife conservation and production forestry in Indonesian Borneo (PDF). CIFOR (Center for International Forestry Research). ISBN   979-3361-56-5 . Retrieved 10 September 2018.