"Was David Seville a Primordial Dwarf?"

Don't be alarmed, it's not Christmas yet, Wait...I actually have no idea what day it is...
...okay, I checked. It's Memorial Day Weekend, not Christmas. So hang in there everyone.

I posted this photo, because if you were born before 1985, this is the way you most likely know the Chipmunks. (I assume, I've done zero research on the matter, and still feel taxed).

But THIS photo immediately leaves me with a question that I posed to Google:

"Was David Seville a primordial dwarf?"

Lately we have had more and more chipmunks showing up in our yard. Today, my wife took a photo of one.

Look at the size of those peanuts compared to that little dude! He's so tiny! Now go back to the top and look at David Seville in comparison to Alvin, Simon, and Theodore...depth of field aside, David is petite! Like, fit in your hand petite! He's not even twice the size of Simon (the tallest of the chipmunks)!

So I repose the question: "Was David Seville a primordial dwarf?"

OR, were the chipmunks in fact, NOT CHIPMUNKS AT ALL? Maybe they were bear cubs. 
Christmas with the Bear Cubs doesn't have the ring to it that "Chipmunks" does, so I could see a big record mogul saying, let's call these bear cubs, chipmunks.

Or maybe they aren't animals, but rather very hair humans. It would explain why they could talk as well as sing Christmas standards. I guess a bear cub can be trained to do that, but while disguised as a chipmunk? Seems pretty far-fetched.

Google didn't give me any results to my question. I'll keep looking and get back to you with my findings. Maybe I'll try Bing.