09/21/2010 05:12 am ET | Updated May 25, 2011

Colorado Marmot Population Expanding Rapidly

In a remote valley in the mountains of Colorado, the marmot population has tripled over the past decade, but this may not ultimately be good news for the fat, furry, squirrel-like creatures.

Increasingly, short winters have meant that yellow-bellied marmots (Marmota flaviventris) near the Rocky Mountain Biological Laboratory now emerge 20 days earlier from their seven- to eight-month hibernation than they did in the late '70s.

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