Anything anthropomorphic, other than humans, counts as furry.
First off, what's furry? That's an easy thing to tell:
It's an animal that happens to be human as well.
In technical terms we call it anthropomorphics,
But it's easy to explain without all the linguistics;
If it walks like a person but meows like a cat,
You've got yourself a furry - it's as simple as that!
If it talks like a person and flies like a bird,
Then it's still a furry even though it sounds absurd.
'Cause even though birds have feathers and not fur,
Mammals are the commonest type of furry in the world
So the word comes from them. Even starting with a fly,
You'll end up with a furry no matter how hard you try.