The only clear thing is that we humans are the only species with the power to destroy the earth as we know it. The birds have no such power, nor do the insects, nor does any mammal. Yet if we have the capacity to destroy the earth, so, too, do we have the capacity to protect it.
Now came still evening on; and twilight gray Had in her sober livery all things clad: Silence accompanied; for beast and bird, They to they grassy couch, these to their nests, Were slunk, all but the wakeful nightingale.
Men have hitherto treated women like birds which have strayed down to them from the heights; as something more delicate, more fragile, more savage, stranger, sweeter, soulful--but as something which has to be caged up so that it shall not fly away.
Paleontologists have tried to turn Archaeopteryx into an earth-bound, feathered dinosaur. But it's not. It is a bird, a perching bird. And no amount of 'paleobabble' is going to change that.