The point is: I want to see if you guys will admit that humans are natural enemies of anything. Care to answer the OP?
I would say that humans are natural enemies of most species on the planet. All those species that we have not domesticated, or have not adapated to living off of our civilization. Such species are being destroyed by us and by our activities.
Some examples of species for which humans are natural enemies are:
otters, ducks, whales, tucans, polar bears, foxes, tigers, lions, gazelles, elephants.
Some examples of species for which humans are not natural enemies of:
mice, rats, rabbits, squirrels, roaches, ants, termites, cows, goats, pigs, chickens.
As far as the O.P. is concerned, No.