Seasonal migration is another form of escape, especially for large mammals or birds.
季节性迁徙是另一种逃避方式，特别是对大型哺乳动物或鸟类来说尤为如此。
When the planetarium sky matched the sky outside, the birds fluttered in the direction of their normal migration.
当天文馆的天空与外面的天空相匹配时，鸟儿们就朝着它们正常迁徙的方向飞翔。
They have led some birds to give up on migration.
它们导致一些鸟类放弃迁徙。
Early in his research, Kramer found that caged migratory birds became very restless at about the time they would normally have begun migration in the wild.
在克雷默早期的研究中，他发现被关在笼中的候鸟在它们通常开始在迁徙的大致时间会变得非常不安。
The antioxidants apparently help the birds deal with the stress of migration.
抗氧化剂显然帮助鸟类度过迁移的压力。
As birders observe new species, they not only learn about different birds, but they also learn about migration, bird behavior, feed preferences, courtship and bird territories.
观鸟者观察各种新的物种，从中他们不止能认识不同的鸟种，还能学到关于迁徙、鸟类行为学、食性、求爱还有鸟类领地的知识。
It has been shown experimentally that birds can align themselvesto their normal migration routes in blue light but have trouble doing so inyellow or red, so the link seemed worth pursuing.
实验表明，在蓝光中鸟类可以按照正常迁徙路线飞行，而在黄光或红光中则做不到，因此其中的关联值得探讨。
They arrive exhausted and Mai Po, however well protected from fishermen and foreshoremen, lacks the food resources to allow so many birds to build up reserves of fat for their onward migration.
它们来到这里已经是精疲力尽了，尽管米埔被渔民保护得很好，但是仍不足以为如此多的鸟在迁徙中补充体力提供食物。
The survey also found that birds were altering their nesting and migration patterns, and travelling further to find food.
研究同时发现，有些鸟类的筑巢、迁徙习惯也有所改变，为了觅食，它们需要飞行更多距离。
Such tall buildings, a conservationist there protested, would interfere with the night migration of birds, which would bang into the unexpected obstructions.
有一位环保主义者认为，大楼如此之高，将会危及喜欢夜间迁徙的鸟类安全，因为飞鸟完全可能“砰”地一声撞在冷不丁出现的障碍物上。
Fear of predators doesn't just affect the penguins' daily activities, however. It also influences the birds' migration patterns, Ainley and Ballard report this week in Polar Biology.
Ainley和Ballard在本周的《极地生物学》中指出，害怕被捕食已经影响到企鹅的日常活动，甚至它们的迁徙规律。
Check all heights: in prime migration habitats and fresh spring areas, check all heights of the foliage for visiting birds.
各个高度都不要忽略：在候鸟的黄金栖息地和新的地区，要注意在树林的每个高度都找找鸟儿的踪影。
I pick them up at the library: Migration Habits of Birds, Urban Structures, and one that I was particularly excited about: Bats in the Belfry: a Joyous Evocation of Architectural Eccentricity.
在图书馆我挑选了这些书籍：《鸟类的迁徙》，《城市的结构》，还有一本，最让我兴奋不已：《钟楼里的蝙蝠：怪异建筑快乐的召唤》。
One piece of evidence is the migration of many birds between their summer homes and winter homes.
很多鸟类在夏冬季节转换时会进行南北迁移。
Bird banding is one of the important means to research the seasonal migration of birds, and is an effective method in researching the faunas, ecology and morphology of birds.
环志是研究鸟类季节性迁徙的重要手段之一，同时也是研究鸟类区系、生态学、形态分类学等的有效方法。
Shorter days affect migration and breeding behavior, so British birds return to summer breeding grounds about ten days earlier than birds that went south.
白昼短这一点可以影响到鸟类的迁移和繁殖行为，所以，英国的这些鸟类会在后院的梁上繁殖十天，之后才飞往南方。
Researches on stopover during migration of Anatidae birds were carried at Yellowriver wetland, freshwater lake areas in Yulin city and Hanjiang river in winter from 1998 to 2003.
2003年冬季，作者相继在关中平原东部的黄河湿地、陕北榆林淡水湖泊区以及汉江流域对雁形目鸟类的迁徙状况进行了研究。
He described the vernal migration of birds in detail.
他详细地描述了鸟的春季移居。
Although much is known about how birds migrate, insect migration is more mysterious, says ecologist Martin Wikelski of Princeton University in New Jersey.
新泽西普林斯顿大学生态学家Martin Wikelski说，虽然对于鸟类迁徙我们已经知道很多，但是昆虫迁徙仍然知之甚少。
The young birds live with their parents until winter, then the family makes its seasonal migration.
雏鸟出壳后，跟随亲鸟生活，直到冬天。
John:We've been able to learn a lot of new things about bird migration, especially about how fast and how far birds move.
我们获取了很多新的信息，特别是鸟的飞行速度和距离。
John:We've been able to learn a lot of new things about bird migration, especially about how fast and how far birds move.
我们获取了很多新的信息，特别是鸟的飞行速度和距离。
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