Totems are
symbols.  It is an efficient way of
getting a complete message to you with one image.  If an animal shows itself to you in your mind
for no apparent reason, pay attention.  This
may be a sign … a message carrying characteristics you need to become aware
of.  Symbols carry messages.  Totems are symbols. 

If one animal shows up
repeatedly in your life, this is most likely the symbol of your predominant or
most meaningful characteristics, but again we say, if one suddenly comes to
mind in an unexpected moment, pay attention. 
There may be a message for you.
As always, use
intuitive discernment.  Is it a symbol
from spirit or a random thought of the ego? 
How does it feel?  Why would you
need to pay attention to such a message now? 
If the message speaks to your heart, give thanks for the message and
thanks to the messengers.