From an official state report (PDF doc) sanctioned by the witch hunter blessed Governor of Alaska:

“Rats are highly effective as invaders: They are secretive, intelligent, and reproduce at very high rates. They are also ravenous predators that eat the young, eggs, and sometimes adults of birds and other small animals. Well known as carriers of serious diseases in humans, rats are also responsible for diseases that can adversely affect wildlife and, potentially consumers of those wilflife species.”

Go ahead and change out the word “rats” and marvel at how relevant it is to define other people and topics too.