The swamp rabbit is much bigger than the cotton tail but is a member of the cottontail species from what I understand. They are referred to as swamp donkeys, marsh rabbits, cane cutters, swampers, and a few others. They are anywhere from twice the size of a good cottontail up to 7-9 lbs. largest one I ever killed was around 8 lbs. normally they are 2-4lb. They live in swampy areas and swim really well. Hole up in trees when push extremely hard. If you locate a cane break along creek or river bottoms you will find Swampers. I have asked G&F if they are related to hare and they say no!!