You all know what I will say....so I'll try and say something compleatly different.
We are parasites when we do un-natural things, like deforestation, pollution both land, water and air...and killing other species because we wish to dominate the planet.
We also take FAR too long to become independant...a baby cheetah can become independant within a year or so...a human takes nearly 20 years.
We are parasites when we have the ability to think for ourselves and cause destruction.