Best riddles

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?

A man lives on the 44th floor of his building. On rainy days, when he gets home from work, he takes the elevator all the way up to his floor. But on sunny days, he goes up to floor 20 and walks the rest of the way. Why does he do this?

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

What do you get if you add 3 to 300 five times?

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?

Someone said you sounded like an owl.

When I look at her, she smiles at me. When I wink at her, she winks at me. When I kiss her, she kisses me back. When I say I love you, she says it back. Who am I?