Pygmy Eagle
Hieraaetus weiskei
A small eagle of lowland and montane forest. Stocky body with streaky chest. Finely barred and fairly broad wings and tail fanned out in flight and black wing tips. Often soars low over the canopy. Pygmy Eagle has a different shape than the numerous sparrowhawks and goshawks, with a shorter, broader tail. Much smaller than other eagles. Similar in size to some kites but different underwing pattern. Call, a simple, high-pitched “piwit!” in flight.
识别特征
The pygmy eagle is one of the world's smallest-known species of eagle and smallest living member of the Aquilinae subfamily, only rivaled by the Great Nicobar serpent eagle in diminutive size by all modern species referred to as eagles. Pygmy eagle measures 38 to 48 cm (15 to 19 in) in length. The wingspan measures 112 to 126 cm (44 to 50 in). The female eagle is slightly larger than the male. One male pygmy eagle was found to weigh 483 g (1.065 lb). One study estimated the body mass of males of the species to fall around 406 g (0.895 lb) while that of females to fall around 555 g (1.224 lb).<p>The pygmy eagle shares many characteristics with its counterpart the little eagle. The most notable differences are color. The pygmy eagle has darker more pronounced streaks on the nape, crown and ventral. The bird also shares characteristics with the booted eagle, both eagles have a unique underwing pattern. The plumage of the pygmy eagle can vary depending on the morph, light or dark. The dark morph is very similar to the dark morph of the little eagle, while the light morph shows the most differences that occur in the dark streaking. The dark morph seems to be rarer as 10 out of 11 field sightings have been the light morph. The feet of the eagle are described as grey or dull yellow.<p>The voice of the pygmy eagle has been described as a "sip sip yeeee" during flights. The call can also be compared to the little eagle and booted eagle. The bird has also been observed giving a weaker single tone squeal.
分类信息
The pygmy eagle was described by German naturalist Anton Reichenow as Eutolmaetus weiskei in 1900. It was subsequently considered a subspecies of the little eagle or a distinct species. Gjershaug and colleagues analysed it genetically and found it distinct enough to warrant species status. The International Ornithologists' Union (IOC) subsequently recognised it as a distinct species. "Pygmy eagle" has been designated the official name by the IOC.
- 学名
- Hieraaetus weiskei
- 命名信息
- (Reichenow, 1900)
- 目
- Accipitriformes
- 科
- Accipitridae
- 属
- Hieraaetus
分布与栖息地
The pygmy eagle primarily resides in lowland forests and forest edges in New Guinea. They enjoy nesting in closed forestry but have also been seen in open habitat and forest edges. The bird seems to be sparsely distributed throughout the hilly forests of New Guinea; however much of the forests of New Guinea are inaccessible so the eagle may be more abundant than it seems. One of the densely forested parts of New Guinea is Vogelkop or Bird's Head Peninsula. The pygmy eagle has been observed nineteen times in the Vogelkop over three years. It has also been observed on the island Buru and in the northern Moluccas.
- 迁徙
- Resident species
保护状况
- 种群趋势
- declining
照片
分布
其他鸟类
Little Raven
Corvus mellori
Australian crows and ravens are challenging to identify; concentrate on call, throat-hackles, behavior, and location. Calls usually fairly fast and lack the drawn-out wail typical of Australian Raven. Long throat hackles lend it a slightly bearded appearance. Often flicks wings when calling. Inhabits a broad area of southeastern Australia. The default crow/raven in Adelaide and Melbourne and forms very large flocks in high-elevation areas like the Australian Alps.
Vesper Sparrow
Pooecetes gramineus
Large, drab, streaky sparrow of grasslands, second growth, and bare ground. Most distinctive in flight, when it flashes white outer tail feathers. Also note the thin white eyering and rufous shoulder (often hidden). Forages mainly on the ground. Song usually starts with a couple clear introductory notes, followed by a series of trills and chips.
Little Crake
Zapornia parva
Tiny, with long wings and a short greenish bill with a small red base. Face and underparts are plain slaty gray on male, and buffy to whitish on female and juvenile. Adults have plain flanks and boldly barred undertail coverts. Juvenile has barred flanks; compare to similar Baillon’s Crake. Breeds in freshwater wetlands with extensive emergent vegetation, and spends the non-breeding season in a wide range of marshy habitats. Often favors deeper-water aquatic plant stands than other rails and crakes, clambering about nimbly amongst the vegetation. Usually retiring and rarely seen, but can be confiding. Males give a long song that starts with a series of “qwek” notes that eventually accelerates and tapers off; females respond with a descending trill with a similar quality.
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