PBS.新星.蝴蝶的神奇之旅正片免费在线观看-PBS.新星.蝴蝶的神奇之旅纪录电影-碟调网

正在播放：PBS.新星.蝴蝶的神奇之旅-正片
自定义第一行提示文字支持fa图标
自定义这是第二行文字

报错
刷新
5
136
打赏
分享

复制下方内容粘贴给好友

我的主题网，专业主题设计服务商，https://dwz.cn/AaoAFHCs
复制到剪贴板
手机

扫一扫用手机观看
上集
下集

剧情简介

关键词：纪录片昆虫 PBS 自然 2009 美国动物 Documentary 迁徙自然之美

The documentary depicts monarch butterflies’ great and mysterious migration. Each year’s autumn, millions of monarch butterflies start their incredible southward migration from Canada, cross America, to Mexico. They fly above 2,000 miles to arrive the mountain of Mexico .....The film opens with cate The documentary depicts monarch butterflies’ great and mysterious migration. Each year’s autumn, millions of monarch butterflies start their incredible southward migration from Canada, cross America, to Mexico. They fly above 2,000 miles to arrive the mountain of Mexico .....The film opens with caterpillars munching milkweed in southern Canada in late summer. Soon each caterpillar transforms itself into a silky chrysalis. Roughly 10 days later, a delicate four-winged monarch emerges.Then, at some unknown signal, the monarchs take to the air on a two-month, 2,000-mile flight over fields, forests, cities, plains, open water, deserts, and finally mountains to congregate in a tiny, high-altitude region of central Mexico where they've never been before. Incredibly, they arrive by the millions at the same time each year.Shedding light on this natural wonder are some of the world's leading monarch researchers, including Lincoln Brower of Sweet Briar College, independent biologist Bill Calvert, and Orley "Chip" Taylor of the University of Kansas.Putting the monarch phenomenon into perspective, Taylor says, "You've got a butterfly that's originating in Toronto, or it's originating in Detroit, Michigan, or it's coming down from St. Paul or maybe even Winnipeg, and it's moving south. Somehow it finds its way to Mexico. Could you do that?"No one yet knows how the butterflies do it, but Taylor's research reveals that they are expert navigators. In one experiment, he transported Mexico-bound monarchs from Kansas to Washington, DC, and then set them loose. At first, they flew south as if they were still in Kansas—a course that from Washington would miss Mexico entirely. But after a few days, they corrected their flight path, as if some inborn GPS unit had alerted them to the true direction of their destination.In another sequence, NOVA accompanies celebrated monarch watcher Bill Calvert around backcountry Texas as he looks for signs of the monarch migration. Sure enough, they show up en masse and on time, heading toward the Sierra Madre mountains across the border—the last leg of their flight.And in the Mexican state of Michoacán, NOVA joins mountain villagers as they celebrate the arrival of the monarchs in the first week of November. The butterflies' arrival marks the start of a celebration called the Day of the Dead, since the local people have traditionally associated the monarchs with the returning souls of their departed ancestors.Unfortunately, illegal logging in the Mexican butterfly sanctuaries threatens the unique habitat that monarchs depend on for their survival. Monarchs may not yet be an endangered species, but their annual migration is an endangered phenomenon that could dwindle to insignificance if the giant firs that they cling to during the winter disappear.Gone also would be the colorful festival that closes the program—a fireworks display welcoming the hardy fliers to Mexico, with orange bursts against the black sky, looking almost like the beautiful cloaks of the monarchs.. 详情

大家正在看

影片评论

本站所有视频和图片均来自互联网收集而来，版权归原创者所有，本网站只提供web页面服务，并不提供资源存储，也不参与录制、上传
若本站收录的节目无意侵犯了贵司版权，请发邮件至123456@qq.com （我们会在3个工作日内删除侵权内容，谢谢。）

网站地图 RSS订阅百度蜘蛛谷歌地图必应地图 360地图搜狗地图

电影

剧集

综艺

动漫

专题

明星

扫一扫关注我们