The Ark has been expanding and now offers two new biomes: the swamp and the snow – of course with a complete own flora and fauna.
The snow biomes offer a very cold area at the top left of the map. These areas are very hostile and should only be visited with proper equipment. Of course you’ll find more “cold – loving” animals up there – like the Mammoth or the new Direwolf.
The swamp on the other hand is a very humid place on the Island with normal to hot conditions which will host animals like the Sarcosuchus or the new Beelzebufo.
Both are a huge increase in the variability of the Island. So visit them as soon as possible.