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揭秘鸟类的性爱生活:也有同性恋和自慰(组图)(4)

2007-07-31 10:40:17 论坛　【大中小】发表评论

    鸟类有性欲和快感吗？雄鸟睾丸的体积繁殖期间会增大五百倍，重量增加四百倍。为了满足性需要，有些鸟会作出暴力行为，比如绿头鸭，可以成群追赶一只母鸭，并粗暴地把它的头按在水中“强奸”。雄松鸡发情时如找不到性伴侣，会用泥巴来自慰，蜂鸟则用树叶。

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英国最珍稀鸟类大鸨 175年首次在英下蛋(图) (2007-07-25 09:22:00)

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