Migration is the second expansion aka thematic pack for Serengeti: A Race For Life. It contains 30 cards and provides an alternative to the starting setup as well as changing the dynamics of the game. In Migration the emphasis is on grassing animals, a class of animals found in the game that is further expanded in this expansion with the addition of the Zebra. The Zebra takes center stage in this thematic pack and is required in every game playing with this setup, alongside the Wildebeests (special cards) that drives a new majority that players will need to vie for. Of course no Great Migration would be complete without Crocodile watching their every move, so expect a game of attrition where our grass-eating friends can roam free, but not as freely as they'd wish! —description from the publisher