What am I riddles

I am a white box having no key or any lid. Yet there is a golden treasure inside it. What Am I ?

I am small and shy. I have eight legs. I eat bugs. I catch them in my web. I am a...

I have four legs and a long tail. I eat oats and hay. I love to run fast. I let people ride on my back. I am a...

I am the black child of a white father, a wingless bird, flying even to the clouds of heaven. I give birth to tears of mourning in pupils that meet me, even though there is no cause for grief, and at once on my birth I am dissolved into air. What am I?

To you, rude would I never be, Though I flag my tongue for all to see. What am I?

If will follow you for 1000 miles but not miss home. It desires neither food nor flowers. It fears not water, fire, knives, nor soldiers. But it disappears when the sun sets behind the western mountains. Who Am I?

What am I?

Wash it and it isn't clean. Don't wash it and then it's clean. What I Am?

I’m tall when I’m young, I’m short when I’m old, and every Halloween I stand up inside Jack O Lanterns. What am I?

Only one color, but not one size. Stuck at the bottom, yet I easily fly. Present in sun, but not in rain. Doing no harm, and feeling no pain. What Am I?