Best riddles with simple answers

What is represented by this BrainBat Pattern? EST EST EST EST

I visit you every night even if you don't call me. I'm lost every day. What Am I?

At night they come without being fetched. By day they are lost without being stolen. What are they?

What is a Owl's favourite subject at school?

I eat other animals. I have a big mouth. I am green. I live in the water. Who am I?

I had no father, only a grandfather. I shall bear no sons, only daughters. What am I?

Thirty white horses on a red hill. First they champ, Then they stamp, Then they stand still. Who are they?

I can be as thin as a picture frame but my insides have many things you can see. What am I?

What has a neck but no head?

When you have me, you feel like sharing me. But, if you do share me, you don't have me. What am i?