Not much info on wikipedia this time, but here's a little video from the Korkeasaari zoo. I learned that the name "comb-rat" (in Finnish comb-toe-rat) comes from their back feet where they have bristles that they use to keep their fur in good shape... and they don't drink water at all, they survive on the juices they get from their veggie diet. Here is the back of my card with the short description from the encyclopedia. It was so short, I added the comb-rats family description too. It says they are able to climb up vertical rocks and are noisy, producing almost songbird type whistles! Would you have guessed?