What am I?

Forwards im heavy, backwards im not. What am I?

I'm not a bird, but I can fly through the sky. I'm not a river, but I'm full of water. What am I?

The time between daylight and darkness when blood drinkers like to come out. What am I?

Half of the population uses me, and you lose me all the time. I'm small and yellow, black, brown or silver. You use me to hold things up. What am I?

Riddles and Answers