Answer:
If a man carried my burden, he would break his back. I am not rich, but leave silver in my track.
It is by nature, soft as silk; A puffy cloud, white as milk; Snow tops this tropical crop; The dirtiest part of a mop
Until I am measured I am not known, Yet how you miss me when I have flown.
A reaction to being spooked that takes its name from waterfowl
By Moon or by Sun, I shall be found. Yet I am undone, if there's no light around
When is it bad luck to see a black cat?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?