潛鳥科|潛鳥屬

學名：Gavia arctica

英名：Black-throated Diver

形態(tài)：大型游禽，體長56-75cm。繁殖期頭灰色，喉及前頸閃輝墨綠色，上體黑色具白色方形橫紋。頸側及胸部具黑白色細縱紋。非繁殖期下體白色上延及頸側、頦及臉下部，兩脅白色斑塊明顯。第一冬的鳥上體具白色鱗狀紋。

虹膜紅色；嘴灰黑色；腳黑色。

分布：繁殖于北半球，從蘇格蘭北部至西伯利亞。冬季南遷至北緯30°左右。在保護區(qū)屬罕見的旅鳥，2013年9月19日在老鐵山燈塔海域觀察到1只。

習性：單獨在淡水水域繁殖，冬季常成散群在沿海越冬。主要以各種魚類為食。

ID: Large swimming bird.Body length 56-75cm.Summer adult has velvety pale grey crown and hindneck， black throat patch with green gloss， and clear black and white stripes on neck and breast-sides.Upperbody has a pattern of distinct white patches.Winter adult has white extending from cheeks， throat， foreneck to underbody.Distinctive white flank patch in all plumage.Juvenile/1 st-winter has pale， scaled pattern on back and scapulars.

BP: Eyes red； bill greyish black； tarsi black.

SD: Rare migrant.One in the sea near the lighthouse on Laotie Mountain on 19 Sep，2013.

HH: Solitary pairs breed at clear lakes and pools.Winter along coasts at times in loosely scattered gatherings.Feed mainly on fish.

黑喉潛鳥［攝影　劉濤］