[Nullifidian]

Probably one of the creepiest animals are parasites that live inside you, so I'll just post a bit more of them:

Originally Posted by _.Spitfire._

Motherfucking botflies. They lay eggs in flesh, including that of humans!

If you're not yet convinced that these flies are absolutely terrifying, this will do it for you. They lay their eggs usually in cattle but humans will do just fine. They search for wounds to try and lay their eggs in. Once the eggs hatch, the 200 or so larvae will start to burrow and eat flesh from within to grow. The bigger they grow the more flesh they'll need causing all sorts of gross oozing nastiness. Now, they don't always need a wound to lay their eggs in. Nostrils or eyelids will do just fine as seen in this picture:

And to further creep you out, there's these fucks:

These are eye worms that penetrate the inside of your eye and live there. You might be thinking oh well thank goodness that's in a frog's eye. Can't possibly happen to humans, right? Right?!

WRONG!

Now the following bitches are probably even creepier to look at. They're called Leucochloridium Paradoxum and are hatched inside birds. These birds poop them out every once in a while and they just chill in the poop for a while. They have to reproduce though and to do that they have to get back inside the bird to lay their eggs there. But how do you get back inside a bird again if you were just chilling in their poop? Easy, you wait till a snail comes by and try to attract the birds! How do they attract the birds? Like this: