ELI5: Explain Like I'm 5

Infrared sensing in vampire bats

Imagine you're playing hide-and-seek in the dark. You can't see anything, and you're trying hard to listen for your friend's footsteps. But what if I told you that there's a special ability some animals have that lets them "see" heat instead of light? That's what vampire bats can do!

You know how you can feel when someone gets close to you, even if you can't see them? That's because your body gives off heat, and you can sense that heat with your skin. Vampire bats can do the same thing, but they have a special part of their nose called the "nose leaf" that helps them do it even better.

When vampire bats are out looking for food (which happens to be blood), they use their infrared sensors to find warm-blooded animals like cows or pigs. The sensors pick up on the heat the animal is giving off, even if it's hiding in a dark barn or under the leaves of a tree. The vampire bat can then swoop in and use its sharp teeth to make a tiny incision in the animal's skin and drink its blood. Gross, right?

But don't worry, vampire bats don't usually bite humans. They prefer to snack on farm animals, and they're actually pretty important to our ecosystem. And they're pretty cool, too – imagine being able to "see" heat like a superhero!
Related topics others have asked about: