Answer:
I have a neck but no head. I have a body but no arm. I have a bottom but no leg.
Take one out and scratch my head I am now black but once was red.
I have a tongue, but do not talk. I follow close, but neither run nor walk. Coupled and hitched, but never married. You couldn't bear the load I've carried.
Until I am measured I am not known, Yet how you miss me when I have flown.
Put into a pit, locked beneath a grate, guarded through the night, yet it still goes out.
When is it bad luck to see a black cat?