ScienceDaily Posted November 15, 2018 Share Posted November 15, 2018 Researchers have studied flight routes to determine how far willow warblers migrate in the autumn. The results show that the willow warbler holds a long-distance migration record in the 10-gram weight category -- with the small birds flying around 13,000 kilometers or longer to reach their destination. View the full article Quote Link to comment Share on other sites More sharing options...
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