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| | Animals in winter - hibernation, migration, hibernate, migrate, adaptation, adapt, animal behavior |
 | | For example, a hibernating woodchuck's heart rate slows from 80 to 4 beats per minute, and its temperature drops from 98 F to as low as 38 F. If its temperature falls too low, it will awaken slightly and shiver to warm up a bit. |
 | | However, even when the weather is severe, hibernators may wake up for short periods every few weeks to use their "toilet rooms" and eat if food is available. |
 | | While the northern ground squirrels spend the summer eating and preparing for winter hibernation, ground squirrels living in the southwest desert may avoid the extreme heat by aestivating in their burrows. |
| www.sciencemadesimple.com /animals.html (2141 words) |
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