Poaching and climate change might be the reasons why more than 1,200 migrating animals did not make it across the wide Arctic waterway.
In less than three years, the number of animals on the island of Kolguyev dropped from more than 12,000 to only 153.
Climate change is triggering behavior change among animals across the Arctic. In Northern Siberia wild reindeer this summer started migrating almost a month earlier than normal.
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