Groundhog dens, which may or may not be occupied by their digger. No fox or coon here at the moment.
Groundhogs will often partially block their over-wintering holes with leaves and dirt in order to keep out wet and cold.
During the summer a groundhog's heart rate is around 80 beats a minute, and it has a temperature of 98 degrees Fahrenheit.
In the coldest parts of winter, however, a groundhog's heartbeat drops to only 5 beats a minute, and its body temperature drops to just 38 degrees.
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