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。