Dusky Eagle-Owl
Ketupa coromanda
A very large, grayish-brown owl with yellow eyes and distinctive ears. Note the fine barring and dark streaks on the pale underparts, and white patches on the shoulders. In flight, wings and tail are strongly barred below. Perches in tall trees, usually near a water body, where it waits for birds and mammals to pounce upon. The call is a distinctive series of low, guttural notes that increase in volume and speed before trailing off towards the end.
识别特征
The dusky eagle-owl is a large greyish-brown owl with prominent ear tufts. Its underparts are greyish white with some dark brown streaks, and its dark brown wings have some whitish streaks. K. c. klossii is similar to the nominate subspecies but much darker and with no obvious whitish markings on wings and scapulars. Wings are 380–435 mm, and tail is 187–224 mm.
分类信息
The species was first described by John Latham in 1790 as Strix coromanda. This is the nominate subspecies that occurs in South Asia. In the 20th century, the following subspecies was described:
- 学名
- Ketupa coromanda
- 命名信息
- (Latham, 1790)
- 目
- Strigiformes
- 科
- Strigidae
- 属
- Ketupa
分布与栖息地
The dusky eagle-owl occurs from Pakistan, India, Nepal and Bangladesh to Myanmar, Thailand, Malaysia into China.In Peninsular Malaysia, it has been recorded in oil palm plantations during surveys carried out between autumn 2009 and 2010 in the states of Selangor, Perak, Pahang and Negeri Sembilan.<p>It inhabits forests, wooded wetlands, agricultural areas with scattered groves and trees, and roadside avenues with old large trees.
- 迁徙
- Resident species
行为
The dusky eagle-owl is not deterred by daylight though is largely active at night emerging from its roost shortly before sunset. The species has been seen hunting during the day during cloudy weather.<p>The nesting season is from November to April, with most of the breeding observed during December and January. The dusky eagle-owls use stick nests of other large birds on trees such as Ficus, Mitragyna and Dalbergia. In Haryana, breeding owl pairs preferentially reused nests of woolly-necked Storks Ciconia episcopus. Very few dusky eagle-owl pairs used nests made by other bird species, which included red-naped ibis Pseudibis papillosa and Indian spotted eagle Clanga hastata. Storks showed a preference for native Dalbergia sissoo and Ficus religiosa trees along with the exotic Eucalyptus trees. The owls exercised a second level of preference of tree species that had stork nests, and preferentially reused nests on Eucalyptus sp. Most dusky eagle-owls reused stork nests in areas that had high densities of stork nests suggesting that the owls were tracking the breeding progress of woolly-necked storks. The study in Haryana underscored the importance of multifunctional agriculture – agroforestry amid cereal crops – to maintain healthy breeding populations of dusky eagle-owls.<p>The dusky eagle owl species is one of the least studied owls in the world, and the majority of information on its biology is from anecdotal observations.
保护状况
- 种群趋势
- declining
照片
分布
鸟叫声
其他鸟类
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Polioptila dumicola
Bold patterned gnatcatcher usually found in the canopy of savanna, open woodlands, and forest edges where it may join mixed-species flocks. Largely grayish overall with a white-edged black tail. Males have a black mask while females have a small black ear patch on a generally pale face. Males of the subspecies from Northwest Brazil are whiter below and grayish in other populations.
Greater Flameback
Chrysocolaptes guttacristatus
A large, crested woodpecker with a golden back found in wet tropical and subtropical forests across South and Southeast Asia. Separated from Common Flameback and other “small-billed” flamebacks by a much larger bill, a mottled black-and-white nape instead of a black nape, and a divided black horizontal stripe below the cheek. Separated from the similarly large-billed White-naped Woodpecker by a red rump, the lack of a clean white nape, and a preference for wetter habitat. Greater Flameback is a loose participant in mixed-species foraging flocks, often detected by its loud, high-pitched trill similar to that of Common Flameback.
Singing Quail
Dactylortyx thoracicus
Small, retiring quail of forest understory. Rarely seen, but can be located by listening for noisy rustling in the leaf litter as birds scratch like chickens. Prefers to run away rather than flush. Loud song often reveals its presence, given mainly early and late in the day: first few notes similar to Little Tinamou song, but then breaks into rollicking choruses that can be almost deafening if close by. Male has rusty face and gray body, female colors reversed, with gray face and rusty body.
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