Answer:
Stealthy as a shadow in the dead of night, cunning but affectionate if given a bite. Never owned but often loved. At my sport considered cruel, but that's because you never know me at all.
When they are caught, they are thrown away. When they escape, you itch all day.
I fly through the air on small feathered wings, seeking out life and destroying all things.
If you break me, I do not stop working. If you touch me, I may be snared. If you lose me, nothing will matter.
I march before armies, a thousand salute me. My fall can bring victory, but no one would shoot me. The wind is my lover, one-Βlegged am I. Name me and see me at home in the sky.
I spend most of my day eating white. When I am quick enough I get rewarded with fruit and something blue. In a dark room with blue walls I run from the ghosts that roam the halls