Little brown bat

All right, the little brown bat is just one of millions of bats. Now only one is a blood-sucker: the vampire bat, we all know that. And we pretty much all know that they really don't turn into vampires - and anyway these vampire bats they actually suck blood from cows. Some really big kinds of bats eat lizards. But most eat mosquitoes or pollen. Now little brown bats have this little way of seeing in the dark - well not seeing - it's echolocation, like when I posted about the platypus. The little brown bat, or any other kind of bat, squeaks a high-pitched squeak so high that us humans cannot hear it. And then it bounces on something, then it goes back to the bat's ear. That's why bats have such big ears. And then the bat knows where the prey is. And here's something about the bat's wing: from millions of years of evolution: it's really just a wing finger because the pinky is just a really long pinky. But on the down side the thumb was pretty much taken off. And that was the same wing design as the ancient pterosaurs used.

(photo from caveofthemounds.com)