Common Sandpiper
Actitis hypoleucos
Small bicolored sandpiper which often bobs its tail in a distinctively wagtail-like manner. Plain brown with white underparts; distinguished from bulkier and rounder-headed Green Sandpiper by a prominent white spur at the shoulder. Found in a variety of wetland habitats; breeds on stony ground along rivers and lakeshores, with migrants occurring on muddy and rocky substrates from concrete canal banks to channels in tidal mudflats. Mainly found as singles or in small groups, not in flocks or mixed with other species.
识别特征
The adult is 18–20 cm (7.1–7.9 in) long with a 32–35 cm (13–14 in) wingspan. It has greyish-brown upperparts, white underparts, short dark-yellowish legs and feet, and a bill with a pale base and dark tip. In winter plumage, they are duller and have more conspicuous barring on the wings, though this is still only visible at close range. Juveniles are more heavily barred above and have buff edges to the wing feathers.<p>This species is very similar to the slightly larger spotted sandpiper (A. macularia) in non-breeding plumage. But its darker legs and feet and the crisper wing pattern (visible in flight) tend to give it away, and of course they are only rarely found in the same location.
分类信息
The common sandpiper was formally described by the Swedish naturalist Carl Linnaeus in 1758 in the tenth edition of his Systema Naturae under the binomial name Tringa hypoleucos. The species is now placed together with the spotted sandpiper in the genus Actitis that was introduced in 1811 by the German zoologist Johann Karl Wilhelm Illiger. The genus name Actitis is from Ancient Greek aktites meaning "coast-dweller" from akte meaning "coast". The specific epithet hypoleucos combines the Ancient Greek hupo meaning "beneath" with leukos meaning "white". The species is monotypic and no subspecies are recognised.
- 学名
- Actitis hypoleucos
- 命名信息
- (Linnaeus, 1758)
- 目
- Charadriiformes
- 科
- Scolopacidae
- 属
- Actitis
分布与栖息地
The common sandpiper breeds across most of temperate and subtropical Europe and Asia, and migrates to Africa, southern Asia and Australia in winter. The eastern edge of its migration route passes by Palau in Micronesia, where hundreds of birds may gather for a stop-over. They depart the Palau region for their breeding quarters around the last week of April to the first week of May.
- 繁殖区
- PAL : widespread, subarctic to temperate inland waterbody margins of Palearctic: British Is. n to Scandinavia s to Iberian Pen., e through temperate Russia to ec Chukotskiy Pen. (ne Russia), s from Turkey, Caucasus, Iran, c Asia to Kashmir (nw Himalayas), n Mongolia, ne China and Japan
- 非繁殖区
- AF, OR, AU, also Middle East : tropical to subtropical inland and coastal waterbodies of Paleotropics: sw Europe, s Macaronesia (nw of w Africa), Africa, Malagasy region, s Middle East, s, se Asia, Indonesian Arch., Philippines, Taiwan, e China, s Japan, New Guinea, Australia, Bismarck Arch. to Vanuatu, New Caledonia, and Micronesia
- 迁徙
- Complete migrants
行为
The Common Sandpiper is usually encountered alone, occasionally in small groups, although larger flocks are sometimes formed around migration or at breeding season roosts. It seldom joins multispecies flocks. This species has a distinctive stiff-winged flight, low over the water.<p>It nests on the ground near freshwater. When threatened, the young may cling to their parent's body to be flown away to safety.<p>The common sandpiper forages by sight on the ground or in shallow water, picking up small food items such as insects, crustaceans and other invertebrates; it may even catch insects in flight.
保护状况
It is widespread and common, and therefore classified as a species of least concern on the IUCN Red List but is a vulnerable species in some states of Australia. The common sandpiper is one of the species to which the Agreement on the Conservation of African-Eurasian Migratory Waterbirds (AEWA) applies.
- 种群趋势
- declining
照片
分布
鸟叫声
其他鸟类
Ultramarine Grosbeak
Cyanoloxia brissonii
Stunning dark blue bird with a huge bill. Male is mostly deep cobalt with paler highlights on the shoulder and eyebrow and a darker patch around the eye. Female is rich reddish-brown overall. Found singly or in pairs in scrubby wooded habitats, often near water. Can be skulky, preferring to forage in dense thickets. Occurs mostly in southeastern South America, with disjunct populations in Venezuela and Colombia. Compare with Blue-black Grosbeak, which doesn’t overlap much in range and is typically found in heavier forest.
Golden-bellied Gerygone
Gerygone sulphurea
Tiny and rather unobtrusive bird with brownish upperparts and luminous lemon-yellow underparts. Superficially similar to female and juvenile Olive-backed Sunbirds, but note gerygone’s short, uncurved bill. Forages in parks, forests, and plantations, where it often joins mixed flocks moving through the middle and upper layers. Song is variable throughout its range but invariably includes buzzy notes with obvious rises and falls in pitch.
Straneck's Tyrannulet
Serpophaga griseicapilla
Small flycatcher with a gray head, an olive-brown back, a whitish throat, and a yellow belly. Note the white eyebrow and broken eye-ring. Occurs in woodland and scrub; migrates to the northeast during the austral winter. The song is a single note followed by a trill: “twie tirrrrrrrrrrrrrrrrrr.” The similar White-crested Tyrannulet has a different song and is also slightly larger, with a white crown patch that is often concealed.
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