Yellow-billed Shrike
Corvinella corvina
A large, very long-tailed streaky brownish shrike with a paler eyebrow and underparts, a rusty wing panel, and a chunky bright yellow bill and eye-ring. Resident, found in gregarious family groups and nomadic flocks inhabiting arid savanna and woodland. From a perch at middle height, it swoops onto invertebrates and small vertebrates, often on the ground. Vocalizations include a complex and varied series of noisy chatters, shrieks, and rasping buzzes, often given collectively by the group, but the main pair may also duet.
识别特征
The yellow-billed shrike is 32 cm (13 in) with a long, graduating tail and short wings. The adult has mottled brown upperparts and streaked buff underparts. It has a brown eye mask and a rufous wing patch, and the bill is yellow. Sexes are largely similar, but females have maroon patches on the flanks, while males have rufous parches; these patches are only visible when the bird is in flight, displaying, engaging in territorial disputes, or preening. Immature birds show buff fringes to the wing feathers. The legs and feet are black, and the beak is yellow, even in juveniles. It is a noisy bird, with harsh swee-swee and dreee-too calls.
分类信息
- 学名
- Corvinella corvina
- 命名信息
- Shaw, 1809
- 目
- Passeriformes
- 科
- Laniidae
- 属
- Corvinella
分布与栖息地
The species is resident in tropical Africa, south of the Sahara and north of the equator, but is not present in the Horn of Africa. It is present in Benin, Burkina Faso, Cameroon, Central African Republic, Chad, Congo, the Democratic Republic of Congo, Côte d'Ivoire, Gambia, Ghana, Guinea, Guinea-Bissau, Kenya, Mali, Mauritania, Niger, Nigeria, Senegal, Sierra Leone, South Sudan, Sudan, Togo, and Uganda. It makes localised movements, but these have been little studied.
- 迁徙
- Resident species
行为
This is a conspicuous and gregarious bird and a cooperative breeder, always seen in groups, often lined up on telephone wires. The nest is a cup structure in a bush or tree into which four or five eggs are laid. Only one female in a group breeds at a given time, with other members providing protection and food.<p>The yellow-billed shrike feeds on insects, which it locates from prominent look-out perches in trees, wires, or posts. They also sometimes eat small frogs, reptiles, and mice, but are not known to eat other birds or to form larders.
保护状况
- 种群趋势
- unknown
照片
分布
鸟叫声
其他鸟类
Gray-eyed Bulbul
Iole propinqua
Drab, undistinguished-looking bulbul. Predominantly gray-brown with a white throat and slight rufous tones on the wings and tail. Pale eye and unmarked head distinguish it from other plain brownish bulbuls within its range. Tends to be seen solitarily or in pairs but will occasionally join mixed flocks or forage in larger groups at fruiting trees. Unmusical; gives a loud, ringing nasal note, often repetitively.
Paramillo Tapaculo
Scytalopus canus
A poorly known tapaculo found at high elevations near tree line in the northern reaches of Colombia’s western Andes. It was formerly considered a race of the more widespread Paramo Tapaculo. Adult is uniform gray, lacking obvious markings and without the brown coloration found on many other Andean tapaculos. Young birds are brown and heavily barred. Inhabits tangled understory of stunted forest and clumps of small bushes. Song is a long series of buzzy notes that is steady in pace but descends gradually in pitch.
Rufous-sided Broadbill
Smithornis rufolateralis
A small broadbill of lowland wet forests, often found near water in thick vines and tangles. Note the compact shape, the white throat, the rufous chest, the thin black streaking on the underparts, and the white spangling on the wings. Males have dark heads and backs. Like other African broadbills, has a white patch on the back that can be concealed by other feathers. Overlaps locally with both African Broadbill and Gray-headed Broadbill, but note Rufous-sided Broadbill’s habitat, the rufous on its chest, and the white spots on the wings. Most often located by its display sound, a decidedly frog-like trilling “brrrt” that lasts up to half a second, rising in pitch.
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