Climate change may be why birds are migrating earlier across the United States

Birds are migrating earlier in recent decades, which could disrupt feeding and nesting cycles


Every year, whimbrels (Numenius phaeopus) nest in the Canadian and Alaskan tundra before migrating to spend the rest of the year in the mud flats, salt marshes and beaches of the southern United States and South America.

K. Horton/Colorado State Univ.

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