Answer:
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 have many feathers to help me fly. I have a body and head, but I'm not alive. It is your strength which determines how far I go. You can hold me in your hand, but I'm never thrown.
Bold are the first; true are the second; playful are the third; clever are the fourth; forceful are the fifth.
They're up near the sky, on something very tall. Sometimes they die, only then do they fall.
Two horses, swiftest traveling, harnessed in a pair, and grazing ever in places. Distant from them.
I am your mother's brother's only brother in law. Who am I?