花鸟图鉴 › 鸟类

崖海鸦

Common Murre|ウミガラス

Uria aalge · 海雀科 Alcidae

崖海鸦
摄影:Boaworm,来自 Wikimedia Commons,以 CC BY 3.0 授权。照片未经修改(仅缩放)。
地区
日本与温带东亚
环境
海岸与红树林
颜色
黑、白
体型
中型(20 到 50 厘米)
IUCN 等级
无危 (LC)

识别特征

大型海雀,体长 38 到 46 厘米,翼展 61 到 73 厘米,体重约 945 到 1044 克。繁殖羽头、背和翅黑色(南方亚种为深褐),下体白;嘴细长而尖、深色,尾短而圆、黑色。繁殖后换羽,脸变白、眼后有一道深色纹,胁部常有深色纵纹。腿和嘴深灰。飞行快而直但不灵活,水下用翅膀「飞行」,一般潜到 30 到 60 米,最深记录 180 米。

栖息环境

寒冷海域的近海和外海,只在繁殖期上岸,在海崖的岩架和海岛上以极高的密度集群,卵直接产在岩石上,呈梨形以防滚落。

分布

环极地分布于北大西洋和北太平洋的低北极与北方海域;北太平洋的种群繁殖于千岛群岛、北海道天卖岛等地,越冬南到日本北部。日本北部外海冬季可见;中国、新加坡无。寿命约 20 年。

季节与习性

日本北部 11 月到次年 4 月在近海可见;5 到 8 月在天卖岛等地繁殖,北海道的繁殖群曾大幅减少,正在恢复。

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。

海上的个体从船上拍,黑白对比在阴天最柔和,1/2000 秒;潜水前的一跃和出水抖水是动作瞬间。繁殖崖壁从观察点用长焦,密密麻麻站立的群体适合拍图案;别用船靠近崖下惊扰它们。

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

海崖上黑白站立的图案;灰色海面的小剪影。

相似物种

厚嘴崖海鸦(嘴更粗短,嘴基有白线,繁殖羽胁部无纹);斑海雀、扁嘴海雀(小得多)。

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

Common Murre

崖海鸦 · ウミガラス

Uria aalge · Alcidae

Common Murre
Photo: Boaworm, via Wikimedia Commons, licensed CC BY 3.0. Unmodified apart from resizing.
Region
Japan and temperate East Asia
Habitat
coast and mangroves
Colour
black, white
Size
medium (20 to 50 cm)
IUCN status
Least Concern
IOC breeding range
NA, PAL (subarctic to temperate (locally Arctic) n coasts)
IOC non-breeding range
to Virginia in Gulf Stream (w North Atlantic); to Iberian Pen. (e North Atlantic); to n Japan (w North Pacific); to nw Baja California (nw Mexico; e North Pacific)

Identification

A large auk, 38–46 cm long with a 61–73 cm wingspan and weighing about 945–1,044 g. In breeding plumage black on the head, back and wings (dark brown in southern races) and white below; a thin dark pointed bill and a small rounded black tail. After the post-breeding moult the face is white with a dark spur behind the eye and the flanks often streaked dark. Legs and bill dark grey. Fast in direct flight but not agile; underwater it flies with its wings, typically diving to 30–60 m and as deep as 180 m.

Habitat

Inshore and offshore cold waters, coming to land only to breed on cliff ledges and islands in extremely dense colonies, the single pear-shaped egg laid straight onto rock.

Distribution

Circumpolar in low-Arctic and boreal waters of the North Atlantic and North Pacific; Pacific birds breed on the Kurils and at Teuri off Hokkaido and winter south to northern Japan. Seen off northern Japan in winter; absent from China and Singapore. Lives about 20 years.

Season and behaviour

Off northern Japan from November to April; breeds at Teuri and elsewhere from May to August, the Hokkaido colonies once greatly reduced and now recovering.

Photography tips

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

Birds at sea are shot from a boat, the black and white softest under cloud at 1/2000 s; the leap before a dive and the shake on surfacing are the action moments. Breeding cliffs are photographed from the viewpoints with a long lens, the packed standing birds making patterns; never take a boat under the cliff to disturb them.

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

Patterns of black-and-white birds standing on sea cliffs; small silhouettes on grey sea.

Similar species

Thick-billed murre (shorter heavier bill with a white line at the base, unstreaked flanks when breeding); marbled and ancient murrelets (much smaller).

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