Answer:
I fly, yet I have no wings. I cry, yet I have no eyes. Darkness follows me. Lower light I never see.
Through its wounds, water does run. It once held many but now has none. What is it?
The more you take, the more you leave behind.
Creatures of power, creatures of grade, creatures of beauty, creatures of strength. As for their lives, they set everything's pace. For all things must come to live. Under their emerald embrace Either in their life or in their death.
My first is in window but not in pane. My second's in road but not in lane. My third is in oval but not in round. My fourth is in hearing but not in sound. My whole is known as a sign of peace. And from noah's ark won quick release.
If it’s information you seek, come and see me. If it’s pairs of letters you need, I have consecutively three. What am I?