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Migration dilemma

By: David Inouye
Date: February 16, 2000
phenological mismatchsnowpack persistenceCrested ButteColoradoRocky MountainsRocky Mountain Biological LaboratoryTurdus migratoriusMarmota flaviventris

Summary

Global warming is sending mixed signals to creatures that live in the Rocky Mountains of Colorado. Earlier springs have encouraged robins to migrate to breeding grounds high in the mountains earlier, and marmots to wake sooner from hibernation. But the snow is not disappearing from the ground any ea