Black-necked Weaver
Ploceus nigricollis
A medium-sized, dark-eyed weaver in which males and females are distinctly different, but both are colorful. Varies geographically: upperparts are black in the east and brownish-black in central Africa. Found in woodland, thick scrub, moist savanna, gallery forest, and forest clearings and edge. Usually alone or in pairs. Vocalizations are typical of weavers: “chet” notes and a sizzling, “radio static” song. Formerly treated as the same species as Olive-naped Weaver, under the name “Black-necked Weaver.”
识别特征
The black-necked weaver is a stocky 16 cm bird with a strong conical bill. The adult male of the northern race has olive upper-parts and wings, and yellow underparts and head. It has a black eye-mask and bib, and a pale yellow iris. The non-breeding male has a yellow head with an olive crown, grey upper-parts and whitish. The wings remain yellow and black.<p>The adult female also has olive upper-parts and wings, and yellow underparts and head. It has a black eyemask but no bib.<p>The southern race found from Nigeria eastwards has a quite different appearance, with almost black upper-parts and tail.<p>The black-necked weaver feeds on insects and vegetable matter. The calls of this bird include a wheezing dew-dew-twee .
分类信息
The species was formally described in 1805 by the French ornithologist Louis Pierre Vieillot, who named it Malimbus nigricollis. The description was based on a specimen that had been collected near Malimbe, now Malembo, in the Cabinda Province of Angola. The species epithet nigricollis combines the Latin words Latin words, niger meaning "black" and collis meaning "necked".<p>There are two subspecies recognized:<p>The black-necked weaver was formerly considered to be conspecific with the olive-naped weaver. The two species differ in plumage and in the colour of the iris. A molecular study published in 2019 found that the two species are genetically very similar.
- 学名
- Ploceus nigricollis
- 命名信息
- (Vieillot, 1805)
- 目
- Passeriformes
- 科
- Ploceidae
- 属
- Ploceus
分布与栖息地
This weaver occurs in forests, especially in wet habitats.
- 迁徙
- Resident species
行为
It builds a large coarsely woven nest made of grass and creepers with a 15 cm downward facing entrance tunnel hanging from the globular egg chamber. The nest is suspended from a branch in a tree and 2-3 eggs are laid. It nests in pairs but forms small flocks when not breeding.
保护状况
- 种群趋势
- stable
照片
分布
鸟叫声
其他鸟类
Double-striped Thick-knee
Hesperoburhinus bistriatus
Large and bizarre shorebird of lowland dry grassland and savannas, usually found in pairs or small groups. Active mainly at night (note the big, yellow, owl-like eyes). During the daytime, usually seen standing or sitting quietly, often in the shade of small trees or bushes. Note cryptic, overall pale sandy plumage, double stripes on the head, and long yellow legs.
Long-tailed Fantail
Rhipidura opistherythra
A small brown songbird with a long tail, often held cocked or fanned. Upperparts largely rufous except for a grayer head with a pale brow. Shows a white throat and uniform buff underparts. Inhabits lowland forest and sometimes mangroves. Confined to the Tanimbar Islands. Told from Arafura Fantail by the lack of a white tip to the tail and the absence of a black breast patch. Gives a distinctive, repetitive, see-sawing two-note song phrase, “wee-oo-wee-oo-wee-oo,” rising on the first note, falling on the second. Also gives nasal jittering calls.
Purple Sandpiper
Calidris maritima
Plump, rock-loving shorebird with slightly droopy bill. Most often seen in nonbreeding plumage, which is fairly dark gray with spotted underparts. Namesake purple sheen (mostly on back, scapulars, and tertials) only visible at close distance in good light. Legs and base of bill usually bright orange. Messy-looking breeding plumage is darker and more heavily marked, with limited rusty tones on upperparts. Largely inaccessible breeding range on high Arctic tundra; most often seen in northern Europe, Spitsbergen, and Iceland. Winters at slightly lower latitudes, regularly south to the mid-Atlantic region in North America and the Iberian Peninsula in Europe; found in flocks on rocky coastlines and jetties pounded by heavy surf.
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