求翻译：在青海湖的西北隅，有两座大小不一、形状各异的岛屿，一东一西，耸立于蔚蓝的湖畔，这两座魅力的小岛，便是举世闻名的青海湖鸟岛。西边的小岛叫海西岛，又叫小西山，面积0.27平方公里，这里因鸟蛋遍地，也叫蛋岛。东边的大岛叫海西皮，面积4.6平方公里。在这两个岛屿上，仅斑头雁、棕头鸥、鱼鸥、鸬鹚四种候鸟数量就达16.5万只，飞鸟遮天蔽日，十分壮观，数公里外就能听到鸟儿的叫声，可谓是鸟的乐园，鸟的王国。是什么意思？

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Qinghai Lake in the north-west corner, there are two good size, and shape of the Island, east to west, the towering blue lake and the charm of the island, and the Qinghai Lake is world-famous Bird Island. In the West Sea island called the island, also called the Little Western Hills area 0.27 square

In the Northwest corner of Qinghai Lake, two islands