花鸟图鉴 › 鸟类

钳嘴鹳

Asian Openbill|スキハシコウ

Anastomus oscitans · 鹳科 Ciconiidae

钳嘴鹳
摄影:Charles J. Sharp,来自 Wikimedia Commons,以 CC BY-SA 4.0 授权。照片未经修改(仅缩放)。
地区
新加坡与热带亚洲
环境
河湖湿地
颜色
白、灰、黑
体型
大型(50 厘米以上)
IUCN 等级
无危 (LC)

识别特征

大型涉禽。非繁殖期灰白色,繁殖期白色,翅和尾有光泽的黑色带绿或紫的光泽;成鸟上下嘴之间有一道明显的缝隙,上嘴拱起、下嘴反弯,被认为是处理螺类的适应,幼鸟没有这道缝。嘴角质灰色,腿粉到灰色,繁殖前变红。远看有点像白鹳或东方白鹳。

栖息环境

湿地、水田、沼泽和浅水湖泊,主食螺类(包括福寿螺等苹果螺),在水田里成群觅食;在树上集群营巢。

分布

主要分布于印度次大陆和东南亚;2006 年 10 月在云南洱源西湖首次记录于中国,此后在云南、广西等地频繁出现并有繁殖;新加坡近年冬季有大群到访。日本无。

季节与习性

新加坡 11 月到次年 3 月有成群出现的年份;中国西南全年可见并繁殖。在稻田里慢步,用嘴夹出螺肉。

拍摄建议

以下为 FilmAnalysis 编辑的拍摄经验,不是资料来源中的内容。

嘴的缝隙要从侧面近距离拍才清楚,长焦大光圈。它们在水田里成群觅食时用车当掩体;傍晚大群盘旋升空、乘热气流迁移的画面用稍广的焦段。白色身体在稻田的绿色前很干净,别过曝。

拍鸟守则:与鸟保持它不改变行为的距离;不靠近、不公开巢和繁殖地点;不用食物、录音回放或闪光灯引诱;不修剪巢周围的枝叶;在保护区遵守观察区和步道的规定。

适合的摄影风格

稻田里的白色群像;黄昏盘旋的鸟群。

相似物种

白鹳和东方白鹳(嘴直无缝隙,腿红,大得多);白鹭类(嘴尖细)。

相关徽章

暂无。本种还没有经过验证的照片识别,所以没有对应的徽章:图鉴里有名字不等于照片里有证据。

本页插图为 FilmAnalysis 原创绘制。照片来自维基共享资源,授权和作者见图下说明。

收录缘由:本种来自 《观鸟笔记》物种清单(名称经 IOC 15.2 核对)。名称以IOC 世界鸟类名录 15.2为准,事实依据下列资料来源,照片识别暂不提供。

资料来源

Flora & Birds › Birds

Asian Openbill

钳嘴鹳 · スキハシコウ

Anastomus oscitans · Ciconiidae

Asian Openbill
Photo: Charles J. Sharp, via Wikimedia Commons, licensed CC BY-SA 4.0. Unmodified apart from resizing.
Region
Singapore and tropical Asia
Habitat
rivers and wetlands
Colour
white, grey, black
Size
large (over 50 cm)
IUCN status
Least Concern
IOC breeding range
OR (India and se Asia)

Identification

A large wader. Greyish outside the breeding season, white when breeding, with glossy black wings and tail with a green or purple sheen; adults have a distinct gap between the arched upper mandible and recurved lower one, thought to help in handling snails, which young birds lack. The bill is horn-grey, the legs pinkish to grey, turning red before breeding. At a distance it can look like a white or Oriental stork.

Habitat

Wetlands, paddies, marshes and shallow lakes, feeding mainly on snails including apple snails, in flocks in the rice fields; nests colonially in trees.

Distribution

Mainly the Indian subcontinent and South-East Asia; first recorded in China in October 2006 at Xihu, Eryuan, Yunnan, and since then regular and breeding in Yunnan and Guangxi; large flocks have visited Singapore in recent winters. Absent from Japan.

Season and behaviour

In Singapore in flock years from November to March; in south-west China all year, breeding. Walks slowly through paddies extracting snails from their shells.

Photography tips

These are the FilmAnalysis editors' notes, not content from the sources.

The gap in the bill needs a close side view with a long lens wide open. Use a car as a hide when flocks feed in the paddies; the evening flocks spiralling up on thermals to move on want a slightly wider lens. The white body is clean against the green of the rice, so do not let it clip.

Field ethics: keep a distance at which the bird does not change its behaviour; never approach or publish nest sites; no baiting, playback or flash; never clear vegetation around a nest; follow reserve rules and stay on paths.

Photographic styles

White flocks in paddy fields; birds circling at dusk.

Similar species

White and Oriental storks (straight bills without a gap, red legs, much larger); egrets (thin pointed bills).

Related badge

None yet. No validated photo recognition exists for this species, so no badge is tied to it: a name in the encyclopedia is not evidence in a photograph.

The illustration is original FilmAnalysis artwork. The photograph is from Wikimedia Commons; its licence and author are under it.

Why it is listed: this species comes from the Birdwatching Notebook species list (names checked against IOC 15.2). Names follow the IOC World Bird List 15.2; the facts follow the sources below; photo recognition is not offered.

Sources