“Many people think that animals of all kinds can be neatly put into groups and labelled Friend, or Foe; or Harmless, or Harmful. Unfortunately, nature does not work like this, and there are very few creatures in this country that can be described as wholly beneficial or equally destructive… 

This business of friends and foes in nature is a complicated one, but the way to approach it is to learn all we can about the habits of these animals before we decide whether they are guilty or not guilty.”

– Maxwell Knight (Source: The Frightened Face of Nature).