在繁殖季节，雌性改变身上的颜色。
这种鸟雄性比雌性更加色彩艳丽。
挪威的捕鲸人昨天说他们用捕鲸叉捕获了一头雌性小须鲸。
Norwegian whalers said yesterday they had harpooned a female minke whale.
曾被研究过的雌性恐龙也是这样的。
So did female dinosaurs of the kinds that were investigated.
它是雌性，体重近130公斤。
如果雌性企鹅下蛋，所有的雄性企鹅都会筑巢。
All the male penguins will build nests if the female penguins lay eggs.
一种萤火虫的雌性学会了模仿另一种萤火虫的动作。
The female of one species of firefly has learned to imitate the moves of another.
在这些物种中，受精卵发育为雌性，未受精卵发育为雄性。
In these species, fertilized eggs develop into females and unfertilized eggs into males.
这种冷水鱼中只有雌性才能变异出独特的匹诺曹似的鼻子。
Only the females of this cold-water fish sport a distinctive Pinocchio-like snout.
在雌性毒蜘蛛“黑寡妇”的腹部可以看到有威慑作用的红点。
It's the female black widow spider that is venomous and displays a menacing red dot on her abdomen.
“狼蛛，”她说，“会抚摸雌性的腿部，以确保她能接受。”
"A tarantula," she says, "will stroke the female's legs to ensure she is receptive."
这些蜘蛛结成很大的网，雌性蜘蛛在上面用成百上千的卵悬挂茧。
These spiders spin large webs in which females suspend a cocoon with hundreds of eggs.
约一亿六千万年前，一只雌性翼龙隐翅膀受伤而坠落，葬身水底。
About 160 million years ago, a female pterosaur with an injured wing dropped from the sky into a watery grave.
雌性储存精子，可以通过受精或不受精来决定每一个卵细胞的性别。
A female stores sperm and can determine the sex of each egg she lays by fertilizing it or leaving it unfertilized.
这只发现于澳大利亚的小蜘蛛，会向附近的雌性炫耀其彩虹般的色彩。
The tiny arachnid, found in Australia, shows off a rainbow of colors to impress nearby females.
英国的科学家发现，巨型雌性龟能在一条完全的直线上游行上千英里。
British scientists have discovered that the gigantic female turtles can swim for thousands of miles in a perfectly straight line.
这种光来自雌性萤火虫乌贼，它们在春天产卵，然后死亡，被冲到岸上。
The light comes from female firefly squids, which spawn in spring, then die and wash ashore.
与博弈论直接相关的是某些具有大量过剩雌性的寄生蜂种类的性别比例。
Immediately relevant to game theory are the sex ratios in certain parasitic wasp species that have a large excess of females.
可能是雄性可以利用稀少的类胡萝卜素进行免疫防御和解毒，或者吸引雌性。
It may be that males can use scarce carotenoids either for immune defense and detoxification or for attracting females.
这一现象促使德兰格得出结论，这棵野生的贝氏海桐花可能不是真的是雌性的。
This phenomenon led De Lange to conclude that the wild Pennantia baylisiana might not truly be female after all.
对几种动物的研究表明，在选择配偶时，雌性更喜欢鲜艳的类胡萝卜素着色的雄性。
Studies of several animal species have shown that when choosing mates, females prefer males with brighter carotenoid-based coloration.
雌性蜣螂会在每个粪球中种下一个虫卵，虫卵以粪便为食，直到幼虫完全发育成成虫。
Females plant a single egg in a dung ball where it matures from larva to fully formed beetle, feeding off the waste.
当雌性牛鹂被单独养在隔音的房间里，听到雄性歌声的录音，它们就会表现出求偶行为。
When female cowbirds raised in isolation in soundproof chambers were exposed to recordings of male song, they responded by exhibiting mating behavior.
他试图教一只叫巴斯的雄性海豚和一只叫桃瑞丝的雌性海豚隔着一道坚固的屏障互相交流。
What he tried to do was to teach a male dolphin called Bass and a female called Doris to communicate with each other across a solid barrier.
当把雌性牛鹂单独养在隔音的房间里，让它们听到雄性的歌声，它们就会表现出交配行为。
When female cowbirds raised in isolation in sound-proof chambers were exposed to recordings of male song, they responded by exhibiting mating behavior.
一只雄性天堂鸟可能会在最佳的场合中展示他华美的羽毛使自己成为关注的焦点，从而吸引雌性。
A male bird of paradise may put himself in the limelight by displaying his spectacular plumage in the best stage setting to attract a female.
事实上，只要葡萄出现在其它房间里（不用有猴子真的去吃），就足以引起一只雌性卷尾猴的愤恨。
Indeed, the mere presence of a grape in the other chamber (without an actual monkey to eat it) was enough to induce resentment in a female capuchin.
实验设计的美妙之处在于它有效地排除了混淆变量；声学隔离确保了雌性只能对鸣声结构本身做出反应。
The beauty of the experimental design is that it effectively rules out confounding variables; acoustic isolation assures that the female can respond only to the song structure itself.
证据表明，莺主要用它们极其精致的歌声吸引雌性，这清楚地证实了雌雄间选择对鸟类鸣叫进化的影响。
The evidence suggests that warblers use their extremely elaborate songs primarily to attract females, clearly confirming the effect of intersexual selection on the evolution of birdsong.
证据表明，莺主要用它们极其精致的歌声吸引雌性，这清楚地证实了雌雄间选择对鸟类鸣叫进化的影响。
The evidence suggests that warblers use their extremely elaborate songs primarily to attract females, clearly confirming the effect of intersexual selection on the evolution of birdsong.
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