African Fish-Eagle
Icthyophaga vocifer
The adult is a large, distinctive, chestnut-and-white eagle that sits prominently on perches near rivers, lakes, and other waterbodies. The scruffy immature is dark brown and mottled with white on head. In flight the white windows in the wings and pale, dark-tipped tail make the juvenile distinctive. It catches fish with a graceful, shallow plunge to the water’s surface, but it will also eat birds, reptiles, and carrion. It tosses its head backwards while making a loud penetrating “wheeee-ah-kleeuw-kleeuw-kluuu” call; it is one of the most distinctive bird sounds of Africa.
识别特征
The African fish eagle is a large bird. The female, at 3.2–3.6 kg (7.1–7.9 lb) is larger than the male, at 2.0–2.5 kg (4.4–5.5 lb). This is typical sexual dimorphism in birds of prey. Males usually have wingspans around 2.0 m (6.6 ft), while females have wingspans of 2.4 m (7.9 ft). The body length is 63–75 cm (25–29.5 in). The adult is very distinctive in appearance with a mostly brown body with a white head like the bald eagle and large, powerful, black wings. The head, breast, and tail of African fish eagles are snow white, except for the featherless face, which is yellow. The eyes are dark brown in colour. The hook-shaped beak, ideal for a carnivorous lifestyle, is yellow with a black tip. The plumage of the juvenile is brown, and the eyes are paler than the adult's. The feet have rough soles and are equipped with powerful talons to enable the eagle to grasp slippery aquatic prey. While this species mainly subsists on fish, it is opportunistic and may take a wider variety of prey, such as waterbirds. Its distinctive cry is, for many, evocative of the spirit or essence of Africa. The call, shriller when uttered by males, is a weee-ah, hyo-hyo or a heee-ah, heeah-heeah.
分类信息
The African fish eagle is a species placed in the genus Icthyophaga (fish eagles). Its closest relative appears to be the critically endangered Madagascar fish eagle (I. vociferoides). Like all sea eagle species pairs, this one consists of a white-headed species (the African fish eagle) and a tan-headed one (Madagascar fish eagle). These are an ancient lineage of sea eagles; like other sea eagles, they have dark talons, beaks, and eyes Both species have at least partially white tails even as juveniles. The vocifer is derived from its original genus name, so named by the French naturalist François Levaillant, who called it 'the vociferous one'.
- 学名
- Icthyophaga vocifer
- 命名信息
- (Daudin, 1800)
- 目
- Accipitriformes
- 科
- Accipitridae
- 属
- Icthyophaga
分布与栖息地
This species is still quite common near freshwater lakes, reservoirs, and rivers, although it can sometimes be found near the coast at the mouths of rivers or lagoons. African fish eagles are indigenous to sub-Saharan Africa, ranging over most of continental Africa south of the Sahara Desert. Several examples of places where they may be resident, include the Orange River in South Africa and Namibia, the Okavango Delta in Botswana, and Lake Malawi bordering Malawi, Tanzania, and Mozambique. The African fish eagle is thought to occur in substantial numbers around the locations of Lake Victoria and other large lakes in Central Africa, particularly the Rift Valley lakes. This is a generalist species, requiring only open water with sufficient prey and a good perch, as evidenced by the number of habitat types in which this species may be found, including grasslands, swamps, marshes, tropical rainforests, fynbos, and even desert-bordering coastlines, such as that of Namibia. The African fish eagle is absent from arid areas with little surface water.
- 迁徙
- Resident species
保护状况
- 种群趋势
- stable
照片
分布
鸟叫声
其他鸟类
Ayres's Hawk-Eagle
Hieraaetus ayresii
Small black-and-white eagle. Has a compact, powerful shape, and the hint of a crest. The upperparts are black, and there are heavy black markings on the underparts and evenly across the underwing. Found in thick woodland and forest. Soars frequently. Call is a loud, repeated “kwee-ya.” Similar to other hawk-eagles, but has more heavily marked underparts. Easily separated in flight, when Ayres’s Hawk-Eagle shows black barring across the entire underwing.
Pincoya Storm-Petrel
Oceanites pincoyae
Very local in inshore marine waters near Puerto Montt, Chile, where it can be locally numerous. Similar to the common and widespread Wilson’s Storm-Petrel (and may simply be a localized population of that species), but averages more white in plumage, especially on underwing and vent area. “Classic” Pincoya has big white panel on underside of wing, but other birds darker overall, and may not be distinguishable from Wilson’s Storm-Petrel.
Black-legged Seriema
Chunga burmeisteri
Tall terrestrial predator of the Chaco region. Plumage distinctively shaggy. Prefers dense, spiny vegetation, often with thick undergrowth, but can occur in nearby open areas. Smaller and shyer than Red-legged Seriema. Despite its large size, can be difficult to see, and is more often detected by its loud, far-carrying song.
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