送交者: 老椰子 于 May 23, 2011 14:22:12:
回答: 【消遣】春天．生命．他乡 由 小朋友 于 May 23, 2011 13:18:31:
亲近自然，乐趣无穷。
知更鸟真是多。我这里的傍晚，有许多知更鸟在草地上双双觅食。这么多的鸟，不知道它们的窝都在哪里。其他鸟只会跳（如麻雀）或者走（如海鸥），知更鸟两者都会，是个天赋。
知更鸟的雄雌差别不是很显然，你确定分辨对了吗？有以下四个参数（头、腹、脖、尾）：
1) Examine the color of the bird's head. A dark head indicates a male robin, while a pale brownish-gray head means the bird is female.
2) Examine the belly of the robin. A male robin will have a bright reddish-orange belly, while a female's will be a dull orange.
3) Determine the color of the robin's throat. A male robin will have a white throat with a black streak down the middle. A female robin will have a pure white throat.
4) View the underside of the robin's tail. The male robin has white feathers here, while the feathers of a female are a pale gray.
PDF使版面整洁，易于设计和自行修改。