What has one letter and starts with an E?

I have four wings but can't fly.
I express no emotions.
I am found on the exact spot every time you look.
I keep toiling away with a little sound.

Do you know what am I?

They do not possess flesh or feathers or scales or bone
But still, they are blessed with fingers and thumbs of their own.

I am beautiful, up in the sky. I am magical, yet I cannot fly. To people I bring luck, and to some people, riches. The boy at my end does whatever he wishes. What am I?

I have a big mouth and I am also quite loud! I am NOT a gossip but I do get involved with everyone's dirty business.

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

The dirtier I get, the whiter I look. Who am I?

O_er_t_o_

Complete the missing letters of the given word.

I hide my treasure in the ground, my tail is big and fluffy. If you spot me in a tree, please don’t call me scruffy. What am I?