Any of various small sea birds of the family Hydrobatidae, especiallyHydrobates pelagicus, of the North Atlantic and the Mediterranean, having sooty plumage and a white rump. Also called stormy petrel海燕：一种属于水蝙蝠科的小型海鸟，尤指分布于北大西洋与地中海地区的远洋水蝙蝠科 ，具有乌黑色羽毛和白色尾部 也作 stormy petrel