How Bats Evolved Nectar-feeding

A team of evolutionary biologists compared the anatomy and genes of bats to help solve a persistent question in evolution: Why do analyses of different features of an organism result in conflicting patterns of evolutionary relationships? Their findings, “Understanding phylogenetic incongruence: lessons from phyllostomid bats,” appear Read More...

Exploring Life in the Fast Lane

Shrews are voracious, energetic little mammals. So much so that they have even been cast as evil creatures in the 1959 cult classic “The Killer Shrews.” Hollywood depictions aside, shrews do have among the highest basal metabolic rates (BMR) and appear to forage constantly to sustain their high energetic demands. However, there is much variation in activity and energetics even among shrew species.

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Ground Squirrel Hibernation Altered by Climate Change

Climate change is causing a late wake-up call from hibernation for a species of Rocky Mountain ground squirrel and the effect is deadly.

A University of Alberta-led international research team examined data on a population of Columbian ground squirrels (
Spermophilus columbianus) and found a trend of late spring snow falls has delayed the
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Ambushing the Predator: Squirrels and Rattlesnakes

As a young boy growing up in the Adirondack Mountains of Upstate New York, old-timers would often say that if you encounter a black bear in the woods you should shout and wave your arms in an effort to make yourself appear larger and more threatening. Read More...