What does a groundhog do?

Answer 1

Last I checked with my groundhog he didn't have any superstitions, however, humans who live predominantly in North America have a weather forecasting superstition (or more precisely a myth) about him.

It is believed that the groundhog always comes out of his den on the second of February to ascertain the weather conditions.

If when he pokes his head out of hi den, he sees his shadow (the day is bright & sunny) then it is said he returns to his den because winter has six more weeks of control of the land.

If he does not see his shadow (the day is overcast or the weather inclement) he remains above ground and expects Spring to appear.

This can most likely be traced back to an old British rhyme:

If Candlemas be fair and bright,

Come, Winter, have another flight.

If Candlemas brings clouds and rain,

Go Winter, and come not again.

Answer 2

There is no special meaning to seeing a groundhog. You are probably thinking of Ground Hog Day - February 2 - when the groundhog comes out of his burrow and sees his shadow there will be 6 more weeks of winter.

Answer 3

groundhogs live in a burrow