The Love Song of the Cuddly Koala

...sounds remarkably like a hippo with hiccups.  A hicco, if you will (but only if you will-- I'm not pushy).

I have to admit, I've never met a koala in real life, and if I had ever thought about how they sounded, which I didn't, I would have assumed that they made some sort of typical medium sized fuzzy animal sound.  Like a growl, or a slightly deeper raccoon-like chitter.

But no.  Their mating call, at least, is a surprisingly deep raspy staccato sort of bellow.  Here's a short video clip.

I tell you, if I heard that coming from the trees, "koala" would not be my first thought.