"Believe me," the snake said, continuing to instruct her candidate, the 
ass, "no matter what any other animal may say, politics in this forest is 
entirely species-oriented.  A skunk will always vote for a skunk, a rabbit 
for a rabbit, an eagle for an eagle, and so forth.  That's just the way 
things are among us animals."

THE POLITY OF BEASTS

Completely politically incorrect---and completely true.