Answer:
Put into a pit, locked beneath a grate, guarded through the night, yet it still goes out.
What is that over the head and under the hat?
Only one color, but not one size. Stuck at the bottom, yet easily flies. Present in sun, but not in rain. Doing no harm, and feeling no pain.
An iron horse with a flaxen tail. The faster the horse runs, the shorter his tail becomes.
Soldiers line up spaced with pride. Two long rows lined side by side. One sole unit can decide, if the rows will unite or divide.
When is it bad luck to see a black cat?