内容正文:
第三课 鸟
1
大山雀
你认识下图中的鸟儿吗?
金雕
野鸭
啄木鸟
丹顶鹤
观察和思考
比较它们在形态结构上的异同,完成p31表格
喙
足
强大,末端有弯钩
粗壮,趾端有利爪
以鸟、兽等大
中型动物为食
多山或丘
陵地区
长、直
腿细长,可在
浅水中行走
以鱼、虾为食
湿地
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强直、尖锐
趾端有爪,善于攀附在树干上