Red Goshawk
Erythrotriorchis radiatus
Heavily built rusty red raptor with large yellow legs and feet. When perched, the tail is longer than folded wings (Square-tailed Kite has wings extending below the tail). In flight note bulging trailing edge to wing. Tends to soar with wings back and head protruding. Extremely rare and typically limited to tropical areas near river systems in northern Australia. Please try to get a photo if you see one!
识别特征
Plumage is generally rufous; on the head streaked with black and white, having more white on the face and throat; on the upper surfaces (body and upperwings) marked with black. Flight feathers and tail are barred grey, dark above and light below. Underside (belly and underwing coverts) are rufous with slight black ticking. The female has a paler belly than the male. Juveniles (first year) have less streaking on the head.<p>Adults have yellow irides (brown to yellow in the male); juveniles brown. The cere and skin around the eye vary from pale-blue in the juvenile through pale blue-grey to pale-grey in the adult. Adults' legs and feet are yellow; juveniles are pale grey, cream, or pale yellow.<p>Wings are long, broad and fingered at the tips. Its long wings are unlike the short wings of the Accipiter goshawks. Its tail is long and broad; square-tipped and about half its total length. It has a robust bill, slight brow ridge, and very heavy feet with bare tarsi having scutellate scale pattern.<p>Pattern of direct flight is described as "sometimes leisurely, rather heavy and crow-like, with sustained flapping". Pursuit is "powerful and energetic with deep, fluid wing beats, like a fast-flying Brown Falcon". It soars with wings raised in a slight dihedral, almost flat; glides with wings flat or slightly bowed; and sometimes stoops with closed wings. <p>Size is 45–60 cm long, with 110–135 cm wingspan. Males weigh 635 g, females 1100–1400 g. The female is similar in size to a whistling kite, and the male to a female brown falcon.
分类信息
The red goshawk was first described by the English ornithologist John Latham in 1801 under the binomial name Falco radiatus.<p>The species used to be regarded as a very large member of the goshawk subfamily, Accipitrinae, but it is now believed that the resemblance to these other birds is convergent. Experts now group the red goshawk with the superficially dissimilar black-breasted buzzard Hamirostra melanosternon and square-tailed kite Lophoictinia isura as one of the Australasian old endemic raptors. It is believed that the ancestors of these birds, possibly together with a handful of species from South-east Asia and Africa, occupied Gondwana and over millions of years have diverged into their current forms.<p>Gene sequencing studies have found a relationship between Hamirostra and Lophoictinia, however samples had not been obtained from Erythrotriorchis.
- 学名
- Erythrotriorchis radiatus
- 命名信息
- (Latham, 1801)
- 目
- Accipitriformes
- 科
- Accipitridae
- 属
- Erythrotriorchis
分布与栖息地
Sites identified by BirdLife International as being important for red goshawk conservation are Lilyvale in Far North Queensland, Kakadu Savanna and the Tiwi Islands in the Northern Territory, and Mornington Sanctuary in the Kimberley region of Western Australia.
- 迁徙
- Resident species
行为
Migration pattern: Resident species.
保护状况
Population trend: declining.
- 种群趋势
- declining
照片
分布
鸟叫声
其他鸟类
American Herring Gull
Larus smithsonianus
Common and widespread large gull found throughout North America. Adults have a fairly pale gray back, pale eye, and dull pinkish legs. Takes four years for immatures to progress from mostly brown to fully white and gray adult plumage; intermediate plumages are often mottled and messy. Usually shows a dull pinkish base to the bill by the first winter, and develops a pale eye by the second winter. Some immature birds can fade to almost white, especially in their first or second summer, but they always show darker wingtips. Occurs inland and along the coast, frequenting fishing boats, beaches, lakes, and landfills. Often forms large flocks with other gulls.
Marañon Spinetail
Synallaxis maranonica
Very shy spinetail restricted to the Marañon Valley of northwestern Peru and extreme southern Ecuador; highly threatened due to ongoing habitat loss. Plumage is mostly gray with chestnut back, wings, and tail. Inhabits dense tangles inside forest, often in damp gullies or near rivers and streams. Hard to see well, and usually first detected by voice. Typical song is a whining “chew, pit-year” repeated every few seconds.
Ecuadorian Thrush
Turdus maculirostris
A common thrush of clearings and forest edge in most of western Ecuador; also reaches far northwestern Peru. Adult’s tan plumage, yellow bill, and orange eyering are distinct in its range. Young birds have pale spots on their wings, and a mottled breast; they may also have darker bills. Sings a melodious song that can last for many minutes, and also gives a cat-like meow. Visits fruit feeders in some areas.
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