Ovambo Sparrowhawk
Accipiter ovampensis
Medium-sized sparrowhawk that is normally gray, but there is a rare black morph. In all plumages, shows diagnostic white streaks along the central part of the tail, but these are hard to see. The legs and the base of the bill are yellow to reddish. On the typical gray birds, there is gray barring below which is finer and denser on the chest and throat than in other gray sparrowhawks. Generally rare in thick woodland, savanna, plantations, and gallery forest. Call is a repeated “chyek.”
识别特征
The Ovambo sparrowhawk is a small sparrowhawk with the typical broad winged, long-tailed shape of a member of the genus Accipiter. The adults have plain grey upperparts with white bars on the rump and white underparts which are finely barred with grey but with a plain white vent. The tail has three dark bars and a broad, dark subterminal band. The bill is black, contrasting with the red cere, the eyes are dark red and the legs are orange. There is a melanistic form which is all black except for the white barred flight feathers on the underwing. The juvenile is browner and may be white over the underparts and head or have a brown head and rufous underparts. Females are about 14% bigger than males, weighing in at 180–305 g (6.3–10.8 oz) to the males 105–190 g (3.7–6.7 oz). The total length is about 30 cm (12 in) and the wingspan is 67 cm (26 in).
分类信息
The Ovambo sparrowhawk is apparently closely related to the Madagascar sparrowhawk Accipiter madagascarensis and phylogenetic analysis supports these two species forming a well defined clade.
- 学名
- Accipiter ovampensis
- 命名信息
- Gurney, JH Sr, 1875
- 目
- Accipitriformes
- 科
- Accipitridae
- 属
- Accipiter
分布与栖息地
The Ovambo sparrowhawk generally favours the edges of drier forest, woodland and exotic plantations, moving into surrounding savanna and tall woodland with patches of open ground, such as riverine and broad-leaved woodland. In southern Africa its habitat is usually dominated by miombo (Brachystegia spp), Mahobohobo (Uapaca kirkiana) or Zambezi teak (Baikiaea plurijuga). It occurs in sub-Saharan Africa and breeds mostly south of the equator. It is a localised and uncommon breeder in east Africa north as far as Ethiopia and Eritrea south to Tanzania. The main range is in southern Africa where it extends from the southern Democratic Republic of Congo to northern Namibia, Botswana, northern South Africa, Eswatini and Mozambique. In western Africa it is found from the Central African Republic in the east to the Ivory Coast in the west. Birds seen in the northern parts of the range, especially in west Africa, are probably nomadic non-breeding visitors.
- 繁殖区
- AF : Senegal and Gambia to Ethiopia s to n South Africa
- 非繁殖区
- c, w AF
- 迁徙
- Nomadic movement
保护状况
- 种群趋势
- rising
照片
分布
其他鸟类
Black Francolin
Francolinus francolinus
Strikingly patterned male is unmistakable with his jet-black face and breast, white cheek patch, dark rust-brown collar, and bright white spots. Brownish female has a small orange nape patch, pale throat, and dense black-and-white markings all over the body; compare with larger Gray Francolin. Occurs in dry grasslands, agricultural land, and weedy fields. Shier than other francolins; more often heard than seen. Usually solitary or in pairs. Male call is a peculiar, metallic-sounding “keek, keek, kek-ke-kek.” Native to Asia, from Turkey east to far eastern India and northern Myanmar; introduced to Hawaii.
Black-headed Greenfinch
Chloris ambigua
Handsome yellowish finch with daffodil-yellow wing patches and a dark head. Streaky olive-yellow overall with grayish striping on the back and underparts. Male has a darker head than the female. Usually encountered foraging in small flocks or flying overhead. Inhabits open forests, forest edge, fields, and village fringes in hilly and montane regions. Song is a series of wheezy notes with bursts of trills and “tinks” in between. Most common call is a high twitter, often heard as the bird flies overhead. Other calls include wheezy and raspy sounds reminiscent of the song.
White-fronted Ground-Tyrant
Muscisaxicola albifrons
Largest ground-tyrant, usually identified readily by (relatively) big size and high Andean range. Usually seen as singles or pairs foraging on bogs, but also ranges into adjacent rocky puna habitats. Plumage rather plain overall with contrasting dirty whitish forehead patch; pale wing edgings create distinctive “frosty-winged” appearance in flight. Confusion only likely with smaller Ochre-naped Ground-Tyrant, on which ochre nape can be hard to see.
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