花鸟图鉴 › 鸟类

冰岛鸥

Iceland Gull|アイスランドカモメ

Larus glaucoides · 鸥科 Laridae

冰岛鸥
摄影:MPF,来自 Wikimedia Commons,以 CC BY-SA 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
白、灰、黄
体型
大型(50 厘米以上)
IUCN 等级
无危 (LC)

识别特征

中型鸥,但相对纤细轻盈,体长 50 到 64 厘米,翼展 115 到 150 厘米,体重 480 到 1100 克。成鸟上体极淡的灰色,翼尖白色或仅带淡灰斑,没有黑色;头圆、嘴相对细小,眼淡黄,腿粉色。幼鸟全身奶白带细密的淡褐斑纹,翼尖也淡。比北极鸥小而嘴细,通常也比银鸥小。四年成熟。

栖息环境

北极的海岸悬崖繁殖;越冬于海岸、港口、渔港和河口,常混在大型鸥群中。

分布

繁殖于加拿大东北部北极地区和格陵兰,不在冰岛(名字有误导),冰岛只有冬季能见到;越冬于北大西洋南到不列颠群岛和美国东北部,内陆到五大湖。东亚只有日本北部(北海道)冬季有少量记录,中国、新加坡无。

季节与习性

北海道渔港 12 月到次年 3 月偶见,多为单只混在西伯利亚银鸥和灰背鸥群中。

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。

在成百上千的大鸥里找「翼尖没有黑色」的那一只,长焦先扫群体;白翼尖在它张翅时最明显,1/1600 秒。淡色的鸟在雪天港口容易过曝,减半档。与旁边的银鸥同框才看得出它更小更淡。

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

渔港雪天的淡色鸥;灰白的极简。

相似物种

北极鸥(更大,嘴粗,头更平,同样翼尖白);灰林鸥(北美,翼尖灰);一二龄的白化银鸥偶尔相似。

相关徽章

花鸟册里的「海鸥」:当视觉模型在照片里明确认出海鸥并在你评分后解锁。徽章只认到「海鸥」这一层,不区分具体的种,也不会因为这一页存在就解锁。

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

Iceland Gull

冰岛鸥 · アイスランドカモメ

Larus glaucoides · Laridae

Iceland Gull
Photo: MPF, via Wikimedia Commons, licensed CC BY-SA 3.0. Unmodified apart from resizing.
Region
Japan and temperate East Asia
Habitat
coast and mangroves
Colour
white, grey, yellow
Size
large (over 50 cm)
IUCN status
Least Concern
IOC breeding range
NA, PAL (Arctic ne Canada to Greenland)
IOC non-breeding range
coastal Iceland to nw Europe, Labrador to wc North Atlantic coast, and ec North Pacific coast

Identification

A medium-sized but relatively slender, light gull, 50–64 cm long with a wingspan of 115–150 cm and weighing 480–1,100 g. Adults are very pale grey above with white or faintly grey-marked wingtips and no black; round head, rather small bill, pale yellow eye, pink legs. Juveniles are creamy white finely patterned pale brown with pale wingtips too. Smaller and thinner-billed than the glaucous gull and usually smaller than a herring gull. Four years to maturity.

Habitat

Breeds on Arctic sea cliffs; winters on coasts, harbours, fishing ports and estuaries, usually among flocks of large gulls.

Distribution

Breeds in Arctic north-eastern Canada and Greenland, not in Iceland despite the name, where it is only a winter visitor; winters in the North Atlantic south to the British Isles and the north-eastern United States and inland to the Great Lakes. In East Asia only a few winter records from Hokkaido in northern Japan; absent from China and Singapore.

Season and behaviour

Occasional in Hokkaido fishing ports from December to March, usually a single bird among Vega and slaty-backed gulls.

Photography tips

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

Among hundreds of large gulls look for the one with no black in the wingtips, scanning the flock with a long lens; the white tips show best when it opens its wings, at 1/1600 s. A pale bird in a snowy harbour clips easily, so half a stop under. Frame it beside a herring gull to show how much smaller and paler it is.

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

A pale gull in a snowy fishing port; grey-white minimalism.

Similar species

Glaucous gull (larger, heavy bill, flatter head, also white wingtips); Thayer's/Kumlien's forms in North America (grey wingtips); leucistic herring gulls occasionally resemble it.

Related badge

The album badge "a gull" unlocks when the vision model explicitly names a a gull in your photo and you rate the analysis. The badge stops at "a gull": it does not tell species apart, and this page existing unlocks nothing.

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