It eats, grows, crawls about a bit, and sleeps (especially when cold). It eventually dies, though if it is lucky, it will get a chance to reproduce first. It is not a very good flyer, but many can...
The English term 'serpent' has several meanings: 1: an obsolete bass cornet; resembles a snake; 2: limbless scaly elongate reptile; some are venomous; 3: a firework that moves in serpentine manner...