people gather wild bird eggs for food as a delicacy in city parks. Yet we blame the wild bird decimation (those birds who was able to survive in already tough city environment created by humans) in cities on cats. Cats don't eat eggs, rats do. Cats control rats. Cats also able to catch and eat an ill bird. It is pretty healthy coexistence until humans forcefully insert themselves. And it is so typical of the human race to blame somebody else for the harm humans create. I mean just look at the environmental damage, including the damage to birds population, resulting from production of that burger you've just ate for lunch.