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Double-crested Cormorant
Nicknamed "crow duck", the Double-crested Cormorant is a large, dark bird with a long neck, longish tail, naked orange-yellow throat pouch and slender hooked bill. It flies with a kinked neck, silently, alone or in ragged v-shaped flocks. In spring, adults display either black or whitish bushy feather tufts on either side of the head, earning them their name. The Double-crested Cormorant nests across much of North America, at scattered locations on the Pacific Coast from the Aleutian Islands to Baja California and from the Rocky Mountains east across the northern Great Plains, around the Great Lakes, along the St. Lawrence River, and on the Atlantic coast in Newfoundland, New England, Florida, and Cuba. Some coastal populations are resident, but most northern and interior nesting birds migrate as far south as Mexico and the southeastern U.S.A.
（以上来自谷歌）
（以下来自百度）
双冠鸬鹚（学名：Phalacrocorax auritus）是鹈形目鸬鹚科的鸟类，鸟嘴强而长，上嘴两侧有沟，嘴端有钩，适于啄鱼；下嘴基部有喉囊；鼻孔小，在成鸟完全隐闭；眼先裸出；颈细长；两翅长度适中，缺第五枚次级飞羽；尾圆而硬直，有12-14枚尾羽；脚位于体的后部；跗蹠短而无羽；趾扁，后趾长，有蹼相连。潜水后羽毛湿透，需张开双翅在阳光下晒干后才能飞翔。
栖息于岛屿、海滨及其沼泽地带。主要食鱼类和甲壳类动物为食。鸬鹚在捕猎的时候，脑袋扎在水里追踪猎物。鸬鹚的翅膀已经进化到可以帮助划水。分布于阿拉斯加和纽芬兰南部到墨西哥和古巴中部。 |
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