I really these hybrid suggestions wold make great additions to Niche. What if there was also a creature exclusive to the swamp as well? It could a mixure of a long haired car (like a maincoon), and a orchid praying mantis. It would be called somrthing like prayingcoon. It could possibly have the following mutatable genes:
Compond eyes- +2 sight
Silky Body- +2 Cold Resistence +2 Stelth
Scythe Claw- +3 (or 4) Strength
Silky Tail- +1 Cold Resistence +1 Stelth