Detailed text transcripts for TV channel - DW - 20190428:21:32:00
Winter there are landfill sites after a trip of about nine hundred kilometers. others keep going and fly three and a half thousand kilometers to west africa how come what determines who goes where. biologist and they are flock is the first scientists do have researched this question in any depth and it had only meant undeserved no one had looked into it yet because it's really difficult to gather precise data on the behavior of groups of wild animals. stalks are quite quite you can't get close and stare at them and how can you observe in detail vast flocks on the way dr flock found a way in tw...