燕属(Hirundo)在动物分类学上是脊索动物门(Chordata)、脊椎动物亚门(Vertebrata)、鸟纲(Aves)、雀形目(Passeriformes)、燕科(Hirundinidae)的一属。世界有20种,中国有4种,其中以家燕和金腰燕等比较常见。
在英国周围的海岸,象北极燕鸥、三只鸥、海雀和海鸭等海鸟数量的显著减少,可能是由于玉筋属鱼类消失导致的。
The striking drop in numbers round British coasts of such seabirds as arctic terns, kittiwakes, guillemots and puffins is probably a result of the disappearance of sand eels.
河间在春秋属燕国之域,战国时期分属燕、赵二国,秦属巨鹿郡。
Hejian Yan State in the Spring and Autumn are the domain, belong to the Warring States period Yan, Zhao two countries, Qin is Julu County.
一种燕鸥黑燕鸥和小黑燕鸥属,发现生长于热带水中,头为白色或灰色,身为深褐色或黑色。
Any of several terns of the genera Anous and Micranous, found in tropical waters and having a dark brown or black color with a white or gray head.
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