D’oh, I thought that JThunder was just saying that badgers were embleer. I completely missed the other reference.
For the longest time, I thought this book was about a disabled submarine.
And the Irish city of Dunleary (Dun Laoghire).
And the Discworld palace of Dunmanifestin . . . Wait . . .

What we know about King Darzin is that “King Darzin ruled over the biggest and richest of the animal cities in the world. . .” My guess is that, like Brainglutton suggests, King Darzin is a hare, which is why Rabscuttle was “the same size as one of his children and not much different to look at”.
It does, however, add to the mystery, that when King Darzin’s people go to war against the rabbits, and El-ahrairah makes a deal with the Black Rabbit to defeat them, they are all driven away and “That is why nobody can say what kind of animals they were or what they looked like.”

“That is why nobody can say what kind of animals they were or what they looked like.”
Yet we know they weren’t very different from the rabbit-people of the time. So all the kinds of animals must have been more alike than now.