Mindoro Imperial-Pigeon
Ducula mindorensis
A large pigeon of montane forest canopy on Mindoro with a metallic green wing and rump, a bronzy back, a buffy throat, and gray underparts, sides of the neck, and crown. Note the red eye-ring and the broad gray central band in the black tail. Somewhat similar to Pink-bellied Imperial-Pigeon, but Mindoro lacks the dark neck and chest. Also similar to Green Imperial-Pigeon, but Mindoro is usually found higher up and has a dark back and a red eye-ring. Song is two deep, booming hoots.
识别特征
The Mindoro imperial pigeon is the largest Philippine pigeon. It measures from 42 cm to 50 cm in length. Its wings are about 24 cm long and its tail measures from 15 cm to 17 cm. Its forehead and throat are both pinkish grey. The head, neck and most underparts are bluish grey, darkest on the belly and under the tail. The hind neck goes from dark grey to black around the upper part of its back. The rest of the back and the inner wings go from a bronzy red colour to a green colour. The majority of the upper parts of the bird are emerald green. It has a black ring around and extending behind the eye. The tail is greenish black with an obvious grey band in the centre. The feathers under the tail are grey with a cinnamon coloured tinge. They have a black bill and their legs are pinkish red. In males, the iris is bright yellow and the eyelids are red. In females, the iris is brownish yellow and the eyelids are yellow orange. No information on juvenile plumage was recorded.
分类信息
The Mindoro imperial pigeon is a bird from the genus Ducula, otherwise known as the group consisting of imperial pigeons. The species Ducula mindorensis, formerly known as Carpophaga mindorensis and Zonophaps mindorensis, was first described by John Whitehead in 1896. Together with Ducula radiata, it forms a superspecies. It is also known to be closely related to Ducula poliocephala and Ducula forsteni, and these three species together may relate Ptilinopus fruit doves to other imperial pigeons.
- 学名
- Ducula mindorensis
- 命名信息
- (Whitehead, J, 1896)
- 目
- Columbiformes
- 科
- Columbidae
- 属
- Ducula
分布与栖息地
The Mindoro imperial pigeon is distributed throughout Mindoro, where sufficient closed canopy forests remain. They used to be found mostly in mountain forests above 1000m. However, in 1991, most of the observations were made in understory trees of the remaining low altitude forests of Mindoro (800-950m). IUCN assessed this bird as Endangered with an estimate of 600 - 1,700 mature individuals. This species is rare and uncommon, but known to be found more easily in Mount Ilong and Mount Halcon. Its habitat is threatened by logging, cultivation, deforestation and forest destruction. <p>Conservation actions proposed include more surveys to better understand population, distribution and ecology. Also, protect the remaining forest on Mt Halcon and lobby for improved protected status.
- 迁徙
- Resident species
行为
The Mindoro imperial pigeon can be seen singly, in pairs or in groups up to four individuals. This species tends to roost together with Ducula poliocephala and Columba vitiensis in the canopy. They tend to be inconspicuous, making it difficult to observe when roosting.<p>No recordings were found, but it is known to be a distinct disyllabic call. Their voice is similar to the other imperial pigeons of Mindoro, but much more resonant and deeper. The Mindoro imperial pigeon's call is frequently heard at dawn.<p>Little to no information is known about their diet. The Mindoro imperial pigeon was seen feeding on fruits, from small berries up to large ones as big as the size of a pigeon's egg.<p>No information can be found about their breeding behaviours. One male was recorded as being in breeding conditions in April and one immature was found in August.
保护状况
- 种群趋势
- declining
照片
分布
其他鸟类
Christmas Island Boobook
Ninox natalis
Small, distinctive boobook with extensive chestnut-brown barring. Favors surviving primary rainforest, but can sometimes be found in secondary growth; can be found on roadsides through suitable habitat when hunting. The only resident owl on the island; the migratory Northern Boobook is a winter visitor to the island, and is significantly larger and much darker overall, with an all-brown head and brown-striped white underparts. Present species gives an odd, distorted-sounding “qwr-qwerk.” Begging birds give a shrill trill. Unfortunately, like many other Christmas Island species, has suffered declines due to the introduced yellow crazy ant, which has caused the owl to disappear from parts of its range.
Rwenzori Apalis
Oreolais ruwenzorii
Slim, pretty, long-tailed member of the cisticola family that sports gray upperparts and buffy underparts with a black chest band. Common in montane forest of the Albertine Rift. Usually in pairs or small groups, readily joining mixed-species flocks. Vocalizations include a ringing “svink” and a lower “veet” which are often given in duet by a pair. Not known to overlap in range with Black-collared Apalis, and differs in having a buffy rather than white throat, and no white in the outer tail.
Mosque Swallow
Cecropis senegalensis
This large swallow has rusty-red underparts, a pale buff throat, and a white leading edge to the underwing that is obvious only in flight. It is mostly resident, although it is also a wet season migrant to the north of its range. Pairs prefer wooded savanna, nesting in banks, termite mounds, and often holes in trees, particularly baobabs. The Mosque Swallow may be confused with the juvenile Rufous-chested Swallow, but it lacks the latter species’ dark “ear-flaps” and buffy forward part of the underwing.
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