What has one letter and starts with an E?

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?

What demands an answer, but asks no questions

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?

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?

I know a nine-letter word having only one vowel.
Do you ?

How many times can you subtract the number two from the number fifty?

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 hole in my back and legs I lack.
I live where I can’t breathe and I eat without teeth.
What am I?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?