Great Slaty Woodpecker

识别特征

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. The average weight was claimed in one study as 430 g (15 oz). 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.<p>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.

分类信息

Genus: Mulleripicus; Family: Picidae; Order: Piciformes.

学名

Mulleripicus pulverulentus

命名信息

(Temminck, 1826)

目

Piciformes

科

Picidae

属

Mulleripicus

分布与栖息地

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). 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.

迁徙

Resident species

行为

Migration pattern: Resident species.

保护状况

Population trend: declining.

种群趋势

declining