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Climate cycles and insect pests drive migration timing of reindeer's North American cousin
 

Climate cycles and insect pests drive migration timing of reindeer's North American cousin

Biologists have discovered two unexpected drivers for migration timing that dispute long-held assumptions and provide insight into potential future effects of climate change on caribou. First, the start of migration is synchronized across North America and tied to large-scale, ocean-driven climate cycles. Second, warm, windless summers that favored insect pests lead to poorer maternal health and delayed arrivals at the calving grounds the following spring. ... read more

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