Amy, as you can see, there are hungry mosquitoes that come out on warm nights! There are no screens in Spain, so if it's warm out and you want to sleep with the windows open, you'll want to protect yourself. You can buy little bottles of stuff that is slowly let out into the air that either kills mosquitoes or keeps them away - I'm not sure which - and they really work. You plug them into an electrical outlet. We always use them when we're in Spain in the summer. I wish I could remember what they're called.... But you can buy them in any supermarket.