Answer:
Though easy to spot, when allowed to plume, It is hard to see, when held in a room.
Sleeping during the day, I hide away. Watchful through the night, I open at dawn's light. But only for the briefest time, do I shine. And then I hide away. And sleep through the day.
I have a neck but no head. I have a body but no arm. I have a bottom but no leg.
Whilst I was engaged in sitting. I spied the dead carrying the living
Hoofed frolicking.
I can only be played on a windy day