Well I love the people who complain about Humans doing human things for human reasons but applaud animals doing animal things for animal reasons. Humans build dams and destroy habitats. Beavers build dams and destroy habitats. Humans build colonies stacking themselves on top of each other, destroying habitats. Ants and Termites build huge colonies (you really need to see the ones in South and Central America as well as Africa to see just how huge they get) destroying habitats for other species. Every species that has ever existed is parasitic upon other species all the way down to bacteria and viruses. Humans aren't even the most effective parasites to have ever destroyed the entire worlds eco system. Cyano bacteria did that Billions of years ago converting animal life on Earth into species that could use Oxygen instead of CO2 and Cyanogens which dominated the atmosphere of Earth for 2 Billion years. ALL life is parasitic and there is only an ever changing push and pull for survival. The Balance of Nature is a fictitious illusion made up by people who impune Humanity in favor of any other life forms, regardless of how selfish and self centered those life forms are for themselves and their own survival over ALL others.