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Too warm to sleep

By: Nigel Hawkes
Date: August 17, 2000
phenological mismatchRocky Mountain Biological LaboratoryGothicColoradoRockiesMarmota flaviventrisSpermophilus lateralis

Summary

Six months ago, David Inouye of the Rocky Mountain Biological Laboratory in Gothic, Colorado, reported that yellow-bellied marmots in the Rockies were rising early from their hibernation. In 23 years, he found, the date when they surface from their long sleep has moved forward by 38 days. This corre